@@ -60,6 +60,13 @@ Major new features:
set the cgroupv2 in the new process in a race free manner. These functions
are GNU extensions and require a kernel with clone3 support.
+* On Linux, the pidfd_spawn and pidfd_spawp functions have been added.
+ They have similar prototype and semantic as posix_spawn, but instead of
+ returning a process ID, they return a file descriptor that can be used
+ along other pidfd function (like pidfd_send_signal, poll, or waitid).
+ The pidfd functionality avoid the issue of PID reuse with traditional
+ posix_spawn interface.
+
Deprecated and removed features, and other changes affecting compatibility:
* In the Linux kernel for the hppa/parisc architecture some of the
@@ -35,6 +35,10 @@ extern int __clone_internal_fallback (struct clone_args *__cl_args,
void *__arg)
attribute_hidden;
+/* Return whether the kernel supports pid file descriptor, including clone
+ with CLONE_PIDFD and waitid with P_PIDFD. */
+extern bool __clone_pidfd_supported (void) attribute_hidden;
+
#ifndef _ISOMAC
libc_hidden_proto (__clone3)
libc_hidden_proto (__clone_internal)
@@ -136,13 +136,13 @@ creating a process and making it run another program.
@cindex parent process
@cindex subprocess
A new processes is created when one of the functions
-@code{posix_spawn}, @code{fork}, @code{_Fork} or @code{vfork} is called.
-(The @code{system} and @code{popen} also create new processes internally.)
-Due to the name of the @code{fork} function, the act of creating a new
-process is sometimes called @dfn{forking} a process. Each new process
-(the @dfn{child process} or @dfn{subprocess}) is allocated a process
-ID, distinct from the process ID of the parent process. @xref{Process
-Identification}.
+@code{posix_spawn}, @code{fork}, @code{_Fork}, @code{vfork}, or
+@code{pidfd_spawn} is called. (The @code{system} and @code{popen} also
+create new processes internally.) Due to the name of the @code{fork}
+function, the act of creating a new process is sometimes called
+@dfn{forking} a process. Each new process (the @dfn{child process} or
+@dfn{subprocess}) is allocated a process ID, distinct from the process
+ID of the parent process. @xref{Process Identification}.
After forking a child process, both the parent and child processes
continue to execute normally. If you want your program to wait for a
@@ -602,6 +602,7 @@ tst-spawn-static-ARGS = $(tst-spawn-ARGS)
tst-spawn5-ARGS = -- $(host-test-program-cmd)
tst-spawn6-ARGS = -- $(host-test-program-cmd)
tst-spawn7-ARGS = -- $(host-test-program-cmd)
+tst-posix_spawn-setsid-ARGS = -- $(host-test-program-cmd)
tst-dir-ARGS = `pwd` `cd $(common-objdir)/$(subdir); pwd` `cd $(common-objdir); pwd` $(objpfx)tst-dir
tst-chmod-ARGS = $(objdir)
tst-vfork3-ARGS = --test-dir=$(objpfx)
@@ -76,12 +76,13 @@ struct __spawn_action
#define SPAWN_XFLAGS_USE_PATH 0x1
#define SPAWN_XFLAGS_TRY_SHELL 0x2
+#define SPAWN_XFLAGS_RET_PIDFD 0x4
extern int __posix_spawn_file_actions_realloc (posix_spawn_file_actions_t *
file_actions)
attribute_hidden;
-extern int __spawni (pid_t *pid, const char *path,
+extern int __spawni (int *pid, const char *path,
const posix_spawn_file_actions_t *file_actions,
const posix_spawnattr_t *attrp, char *const argv[],
char *const envp[], int xflags) attribute_hidden;
@@ -18,78 +18,158 @@
#include <errno.h>
#include <fcntl.h>
+#include <getopt.h>
+#include <intprops.h>
+#include <paths.h>
#include <spawn.h>
#include <stdbool.h>
#include <stdio.h>
+#include <stdlib.h>
#include <sys/resource.h>
+#include <sys/wait.h>
#include <unistd.h>
#include <support/check.h>
+#include <support/xunistd.h>
+#include <support/temp_file.h>
+#include <tst-spawn.h>
+
+/* Nonzero if the program gets called via `exec'. */
+static int restart;
+
+/* Hold the four initial argument used to respawn the process, plus
+ the extra '--direct' and '--restart', and a final NULL. */
+static char *initial_argv[7];
+static int initial_argv_count;
+
+#define CMDLINE_OPTIONS \
+ { "restart", no_argument, &restart, 1 },
+
+static char *pidfile;
+
+static pid_t
+read_child_sid (void)
+{
+ int pidfd = xopen (pidfile, O_RDONLY, 0);
+
+ char buf[INT_STRLEN_BOUND (pid_t)];
+ ssize_t n = read (pidfd, buf, sizeof (buf));
+ TEST_VERIFY (n < sizeof buf && n >= 0);
+ buf[n] = '\0';
+
+ /* We only expect to read the PID. */
+ char *endp;
+ long int rpid = strtol (buf, &endp, 10);
+ TEST_VERIFY (endp != buf);
+
+ xclose (pidfd);
+
+ return rpid;
+}
+
+/* Called on process re-execution, write down the session id on PIDFILE. */
+_Noreturn static void
+handle_restart (const char *pidfile)
+{
+ int pidfd = xopen (pidfile, O_WRONLY, 0);
+
+ char buf[INT_STRLEN_BOUND (pid_t)];
+ int s = snprintf (buf, sizeof buf, "%d", getsid (0));
+ size_t n = write (pidfd, buf, s);
+ TEST_VERIFY (n == s);
+
+ xclose (pidfd);
+
+ exit (EXIT_SUCCESS);
+}
static void
do_test_setsid (bool test_setsid)
{
- pid_t sid, child_sid;
- int res;
-
/* Current session ID. */
- sid = getsid(0);
- if (sid == (pid_t) -1)
- FAIL_EXIT1 ("getsid (0): %m");
+ pid_t sid = getsid (0);
+ TEST_VERIFY (sid != (pid_t) -1);
posix_spawnattr_t attrp;
- /* posix_spawnattr_init should not fail (it basically memset the
- attribute). */
- posix_spawnattr_init (&attrp);
+ TEST_COMPARE (posix_spawnattr_init (&attrp), 0);
if (test_setsid)
- {
- res = posix_spawnattr_setflags (&attrp, POSIX_SPAWN_SETSID);
- if (res != 0)
- {
- errno = res;
- FAIL_EXIT1 ("posix_spawnattr_setflags: %m");
- }
- }
-
- /* Program to run. */
- char *args[2] = { (char *) "true", NULL };
- pid_t child;
-
- res = posix_spawnp (&child, "true", NULL, &attrp, args, environ);
- /* posix_spawnattr_destroy is noop. */
- posix_spawnattr_destroy (&attrp);
-
- if (res != 0)
- {
- errno = res;
- FAIL_EXIT1 ("posix_spawnp: %m");
- }
+ TEST_COMPARE (posix_spawnattr_setflags (&attrp, POSIX_SPAWN_SETSID), 0);
+
+ /* 1 or 4 elements from initial_argv:
+ + path to ld.so optional
+ + --library-path optional
+ + the library path optional
+ + application name
+ + --direct
+ + --restart
+ + pidfile */
+ int argv_size = initial_argv_count + 2;
+ char *args[argv_size];
+ int argc = 0;
+
+ for (char **arg = initial_argv; *arg != NULL; arg++)
+ args[argc++] = *arg;
+ args[argc++] = pidfile;
+ args[argc] = NULL;
+ TEST_VERIFY (argc < argv_size);
+
+ PID_T_TYPE pid;
+ TEST_COMPARE (POSIX_SPAWN (&pid, args[0], NULL, &attrp, args, environ), 0);
+ TEST_COMPARE (posix_spawnattr_destroy (&attrp), 0);
+
+ siginfo_t sinfo;
+ TEST_COMPARE (WAITID (P_PID, pid, &sinfo, WEXITED), 0);
+ TEST_COMPARE (sinfo.si_code, CLD_EXITED);
+ TEST_COMPARE (sinfo.si_status, 0);
+
+ pid_t child_sid = read_child_sid ();
/* Child should have a different session ID than parent. */
- child_sid = getsid (child);
-
- if (child_sid == (pid_t) -1)
- FAIL_EXIT1 ("getsid (%i): %m", child);
+ TEST_VERIFY (child_sid != (pid_t) -1);
if (test_setsid)
- {
- if (child_sid == sid)
- FAIL_EXIT1 ("child session ID matched parent one");
- }
+ TEST_VERIFY (child_sid != sid);
else
- {
- if (child_sid != sid)
- FAIL_EXIT1 ("child session ID did not match parent one");
- }
+ TEST_VERIFY (child_sid == sid);
}
static int
-do_test (void)
+do_test (int argc, char *argv[])
{
+ /* We must have either:
+
+ - one or four parameters if called initially:
+ + argv[1]: path for ld.so optional
+ + argv[2]: "--library-path" optional
+ + argv[3]: the library path optional
+ + argv[4]: the application name
+
+ - six parameters left if called through re-execution:
+ + argv[5/1]: the application name
+ + argv[6/2]: the pidfile
+
+ * When built with --enable-hardcoded-path-in-tests or issued without
+ using the loader directly. */
+
+ if (restart)
+ handle_restart (argv[1]);
+
+ TEST_VERIFY_EXIT (argc == 2 || argc == 5);
+
+ int i;
+ for (i = 0; i < argc - 1; i++)
+ initial_argv[i] = argv[i + 1];
+ initial_argv[i++] = (char *) "--direct";
+ initial_argv[i++] = (char *) "--restart";
+ initial_argv_count = i;
+
+ create_temp_file ("tst-posix_spawn-setsid-", &pidfile);
+
do_test_setsid (false);
do_test_setsid (true);
return 0;
}
+#define TEST_FUNCTION_ARGV do_test
#include <support/test-driver.c>
@@ -29,7 +29,9 @@
#include <support/test-driver.h>
#include <support/xstdio.h>
#include <support/xunistd.h>
+#include <sys/wait.h>
#include <unistd.h>
+#include <tst-spawn.h>
/* Reads the file at PATH, which must consist of exactly one line.
Removes the line terminator at the end of the file. */
@@ -169,17 +171,18 @@ do_test (void)
char *const argv[] = { (char *) "pwd", NULL };
char *const envp[] = { NULL } ;
- pid_t pid;
+ PID_T_TYPE pid;
if (do_spawnp)
- TEST_COMPARE (posix_spawnp (&pid, "pwd", &actions,
+ TEST_COMPARE (POSIX_SPAWNP (&pid, "pwd", &actions,
NULL, argv, envp), 0);
else
- TEST_COMPARE (posix_spawn (&pid, "subdir/pwd-symlink", &actions,
+ TEST_COMPARE (POSIX_SPAWN (&pid, "subdir/pwd-symlink", &actions,
NULL, argv, envp), 0);
TEST_VERIFY (pid > 0);
- int status;
- xwaitpid (pid, &status, 0);
- TEST_COMPARE (status, 0);
+ siginfo_t sinfo;
+ TEST_COMPARE (WAITID (P_ALL, 0, &sinfo, WEXITED), 0);
+ TEST_COMPARE (sinfo.si_code, CLD_EXITED);
+ TEST_COMPARE (sinfo.si_status, 0);
/* Check that the current directory did not change. */
{
@@ -25,11 +25,13 @@
#include <stdlib.h>
#include <string.h>
#include <sys/param.h>
+#include <sys/wait.h>
#include <support/check.h>
#include <support/xunistd.h>
#include <support/temp_file.h>
#include <support/support.h>
+#include <tst-spawn.h>
/* Nonzero if the program gets called via `exec'. */
@@ -143,9 +145,9 @@ handle_restart (const char *fd1s, const char *fd2s, const char *fd3s,
static int
do_test (int argc, char *argv[])
{
- pid_t pid;
+ PID_T_TYPE pid;
int fd4;
- int status;
+ siginfo_t sinfo;
posix_spawn_file_actions_t actions;
char fd1name[18];
char fd2name[18];
@@ -233,17 +235,16 @@ do_test (int argc, char *argv[])
spargv[i++] = fd5name;
spargv[i] = NULL;
- TEST_COMPARE (posix_spawn (&pid, argv[1], &actions, NULL, spargv, environ),
+ TEST_COMPARE (POSIX_SPAWN (&pid, argv[1], &actions, NULL, spargv, environ),
0);
/* Wait for the children. */
- TEST_COMPARE (xwaitpid (pid, &status, 0), pid);
- TEST_VERIFY (WIFEXITED (status));
- TEST_VERIFY (!WIFSIGNALED (status));
- TEST_COMPARE (WEXITSTATUS (status), 0);
+ TEST_COMPARE (WAITID (P_PID, pid, &sinfo, WEXITED), 0);
+ TEST_COMPARE (sinfo.si_code, CLD_EXITED);
+ TEST_COMPARE (sinfo.si_status, 0);
/* Same test but with a NULL pid argument. */
- TEST_COMPARE (posix_spawn (NULL, argv[1], &actions, NULL, spargv, environ),
+ TEST_COMPARE (POSIX_SPAWN (NULL, argv[1], &actions, NULL, spargv, environ),
0);
/* Cleanup. */
@@ -251,10 +252,9 @@ do_test (int argc, char *argv[])
free (name3_copy);
/* Wait for the children. */
- xwaitpid (-1, &status, 0);
- TEST_VERIFY (WIFEXITED (status));
- TEST_VERIFY (!WIFSIGNALED (status));
- TEST_COMPARE (WEXITSTATUS (status), 0);
+ TEST_COMPARE (WAITID (P_ALL, 0, &sinfo, WEXITED), 0);
+ TEST_COMPARE (sinfo.si_code, CLD_EXITED);
+ TEST_COMPARE (sinfo.si_status, 0);
return 0;
}
new file mode 100644
@@ -0,0 +1,36 @@
+/* Generic definitions for posix_spawn tests.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef PID_T_TYPE
+# define PID_T_TYPE pid_t
+#endif
+
+#ifndef POSIX_SPAWN
+# define POSIX_SPAWN(__child, __path, __actions, __attr, __argv, __envp) \
+ posix_spawn (__child, __path, __actions, __attr, __argv, __envp)
+#endif
+
+#ifndef POSIX_SPAWNP
+# define POSIX_SPAWNP(__child, __path, __actions, __attr, __argv, __envp) \
+ posix_spawnp (__child, __path, __actions, __attr, __argv, __envp)
+#endif
+
+#ifndef WAITID
+# define WAITID(__idtype, __id, __info, __opts) \
+ waitid (__idtype, __id, __info, __opts)
+#endif
@@ -26,6 +26,7 @@
#include <stdio.h>
#include <support/check.h>
+#include <tst-spawn.h>
int
do_test (void)
@@ -35,9 +36,9 @@ do_test (void)
const char *program = "/path/to/invalid/binary";
char * const args[] = { 0 };
- pid_t pid = -1;
+ PID_T_TYPE pid = -1;
- int ret = posix_spawn (&pid, program, 0, 0, args, environ);
+ int ret = POSIX_SPAWN (&pid, program, 0, 0, args, environ);
if (ret != ENOENT)
{
errno = ret;
@@ -51,14 +52,13 @@ do_test (void)
FAIL_EXIT1 ("posix_spawn returned pid != -1 (%i)", (int) pid);
/* Check if no child is actually created. */
- ret = waitpid (-1, NULL, 0);
- if (ret != -1 || errno != ECHILD)
- FAIL_EXIT1 ("waitpid: %m)");
+ TEST_COMPARE (WAITID (P_ALL, 0, NULL, WEXITED), -1);
+ TEST_COMPARE (errno, ECHILD);
/* Same as before, but with posix_spawnp. */
char *args2[] = { (char*) program, 0 };
- ret = posix_spawnp (&pid, args2[0], 0, 0, args2, environ);
+ ret = POSIX_SPAWNP (&pid, args2[0], 0, 0, args2, environ);
if (ret != ENOENT)
{
errno = ret;
@@ -68,9 +68,8 @@ do_test (void)
if (pid != -1)
FAIL_EXIT1 ("posix_spawnp returned pid != -1 (%i)", (int) pid);
- ret = waitpid (-1, NULL, 0);
- if (ret != -1 || errno != ECHILD)
- FAIL_EXIT1 ("waitpid: %m)");
+ TEST_COMPARE (WAITID (P_ALL, 0, NULL, WEXITED), -1);
+ TEST_COMPARE (errno, ECHILD);
return 0;
}
@@ -16,6 +16,7 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
+#include <assert.h>
#include <stdio.h>
#include <spawn.h>
#include <error.h>
@@ -27,9 +28,12 @@
#include <sys/resource.h>
#include <fcntl.h>
#include <paths.h>
+#include <intprops.h>
#include <support/check.h>
#include <support/temp_file.h>
+#include <support/xunistd.h>
+#include <tst-spawn.h>
static int
do_test (void)
@@ -48,7 +52,6 @@ do_test (void)
struct rlimit rl;
int max_fd = 24;
- int ret;
/* Set maximum number of file descriptor to a low value to avoid open
too many files in environments where RLIMIT_NOFILE is large and to
@@ -66,7 +69,7 @@ do_test (void)
/* Exhauste the file descriptor limit with temporary files. */
int files[max_fd];
int nfiles = 0;
- for (;;)
+ for (; nfiles < max_fd; nfiles++)
{
int fd = create_temp_file ("tst-spawn3.", NULL);
if (fd == -1)
@@ -75,75 +78,82 @@ do_test (void)
FAIL_EXIT1 ("create_temp_file: %m");
break;
}
- files[nfiles++] = fd;
+ files[nfiles] = fd;
}
+ assert (nfiles != 0);
posix_spawn_file_actions_t a;
- if (posix_spawn_file_actions_init (&a) != 0)
- FAIL_EXIT1 ("posix_spawn_file_actions_init");
+ TEST_COMPARE (posix_spawn_file_actions_init (&a), 0);
/* Executes a /bin/sh echo $$ 2>&1 > ${objpfx}tst-spawn3.pid . */
const char pidfile[] = OBJPFX "tst-spawn3.pid";
- if (posix_spawn_file_actions_addopen (&a, STDOUT_FILENO, pidfile, O_WRONLY
- | O_CREAT | O_TRUNC, 0644) != 0)
- FAIL_EXIT1 ("posix_spawn_file_actions_addopen");
+ TEST_COMPARE (posix_spawn_file_actions_addopen (&a, STDOUT_FILENO, pidfile,
+ O_WRONLY| O_CREAT | O_TRUNC,
+ 0644),
+ 0);
- if (posix_spawn_file_actions_adddup2 (&a, STDOUT_FILENO, STDERR_FILENO) != 0)
- FAIL_EXIT1 ("posix_spawn_file_actions_adddup2");
+ TEST_COMPARE (posix_spawn_file_actions_adddup2 (&a, STDOUT_FILENO,
+ STDERR_FILENO),
+ 0);
/* Since execve (called by posix_spawn) might require to open files to
actually execute the shell script, setup to close the temporary file
descriptors. */
- for (int i=0; i<nfiles; i++)
- {
- if (posix_spawn_file_actions_addclose (&a, files[i]))
- FAIL_EXIT1 ("posix_spawn_file_actions_addclose");
- }
+ int maxnfiles =
+#ifdef TST_SPAWN_PIDFD
+ /* The sparing file descriptor will be returned as the pid descriptor,
+ otherwise clone fail with EMFILE. */
+ nfiles - 1;
+#else
+ nfiles;
+#endif
+
+ for (int i=0; i<maxnfiles; i++)
+ TEST_COMPARE (posix_spawn_file_actions_addclose (&a, files[i]), 0);
char *spawn_argv[] = { (char *) _PATH_BSHELL, (char *) "-c",
(char *) "echo $$", NULL };
- pid_t pid;
- if ((ret = posix_spawn (&pid, _PATH_BSHELL, &a, NULL, spawn_argv, NULL))
- != 0)
- {
- errno = ret;
- FAIL_EXIT1 ("posix_spawn: %m");
- }
-
- int status;
- int err = waitpid (pid, &status, 0);
- if (err != pid)
- FAIL_EXIT1 ("waitpid: %m");
+ PID_T_TYPE pid;
+
+ {
+ int r = POSIX_SPAWN (&pid, _PATH_BSHELL, &a, NULL, spawn_argv, NULL);
+ if (r == ENOSYS)
+ FAIL_UNSUPPORTED ("kernel does not support CLONE_PIDFD clone flag");
+#ifdef TST_SPAWN_PIDFD
+ TEST_COMPARE (r, EMFILE);
+
+ /* Free up one file descriptor, so posix_spawn_pidfd_ex can return it. */
+ xclose (files[nfiles-1]);
+ nfiles--;
+ r = POSIX_SPAWN (&pid, _PATH_BSHELL, &a, NULL, spawn_argv, NULL);
+#endif
+ TEST_COMPARE (r, 0);
+ }
+
+ siginfo_t sinfo;
+ TEST_COMPARE (WAITID (P_PID, pid, &sinfo, WEXITED), 0);
+ TEST_COMPARE (sinfo.si_code, CLD_EXITED);
+ TEST_COMPARE (sinfo.si_status, 0);
/* Close the temporary files descriptor so it can check posix_spawn
output. */
for (int i=0; i<nfiles; i++)
- {
- if (close (files[i]))
- FAIL_EXIT1 ("close: %m");
- }
+ xclose (files[i]);
- int pidfd = open (pidfile, O_RDONLY);
- if (pidfd == -1)
- FAIL_EXIT1 ("open: %m");
+ int pidfd = xopen (pidfile, O_RDONLY, 0);
- char buf[64];
- ssize_t n;
- if ((n = read (pidfd, buf, sizeof (buf))) < 0)
- FAIL_EXIT1 ("read: %m");
+ char buf[INT_STRLEN_BOUND (pid_t)];
+ ssize_t n = read (pidfd, buf, sizeof (buf));
+ TEST_VERIFY (n < sizeof buf && n >= 0);
- unlink (pidfile);
+ xunlink (pidfile);
/* We only expect to read the PID. */
char *endp;
long int rpid = strtol (buf, &endp, 10);
- if (*endp != '\n')
- FAIL_EXIT1 ("*endp != \'n\'");
- if (endp == buf)
- FAIL_EXIT1 ("read empty line");
+ TEST_VERIFY (*endp == '\n' && endp != buf);
- if (rpid != pid)
- FAIL_EXIT1 ("found \"%s\", expected pid %ld\n", buf, (long int) pid);
+ TEST_COMPARE (rpid, sinfo.si_pid);
return 0;
}
@@ -24,6 +24,7 @@
#include <support/xunistd.h>
#include <support/check.h>
#include <support/temp_file.h>
+#include <tst-spawn.h>
static int
do_test (void)
@@ -38,15 +39,15 @@ do_test (void)
TEST_VERIFY_EXIT (chmod (scriptname, 0x775) == 0);
- pid_t pid;
+ PID_T_TYPE pid;
int status;
/* Check if scripts without shebang are correctly not executed. */
- status = posix_spawn (&pid, scriptname, NULL, NULL, (char *[]) { 0 },
+ status = POSIX_SPAWN (&pid, scriptname, NULL, NULL, (char *[]) { 0 },
(char *[]) { 0 });
TEST_VERIFY_EXIT (status == ENOEXEC);
- status = posix_spawnp (&pid, scriptname, NULL, NULL, (char *[]) { 0 },
+ status = POSIX_SPAWNP (&pid, scriptname, NULL, NULL, (char *[]) { 0 },
(char *[]) { 0 });
TEST_VERIFY_EXIT (status == ENOEXEC);
@@ -33,6 +33,7 @@
#include <arch-fd_to_filename.h>
#include <array_length.h>
+#include <tst-spawn.h>
/* Nonzero if the program gets called via `exec'. */
static int restart;
@@ -161,14 +162,13 @@ spawn_closefrom_test (posix_spawn_file_actions_t *fa, int lowfd, int highfd,
args[argc] = NULL;
TEST_VERIFY (argc < argv_size);
- pid_t pid;
- int status;
+ PID_T_TYPE pid;
+ siginfo_t sinfo;
- TEST_COMPARE (posix_spawn (&pid, args[0], fa, NULL, args, environ), 0);
- TEST_COMPARE (xwaitpid (pid, &status, 0), pid);
- TEST_VERIFY (WIFEXITED (status));
- TEST_VERIFY (!WIFSIGNALED (status));
- TEST_COMPARE (WEXITSTATUS (status), 0);
+ TEST_COMPARE (POSIX_SPAWN (&pid, args[0], fa, NULL, args, environ), 0);
+ TEST_COMPARE (WAITID (P_PID, pid, &sinfo, WEXITED), 0);
+ TEST_COMPARE (sinfo.si_code, CLD_EXITED);
+ TEST_COMPARE (sinfo.si_status, 0);
}
static void
@@ -32,6 +32,7 @@
#include <sys/ioctl.h>
#include <stdlib.h>
#include <termios.h>
+#include <tst-spawn.h>
#ifndef PATH_MAX
# define PATH_MAX 1024
@@ -108,17 +109,15 @@ run_subprogram (int argc, char *argv[], const posix_spawnattr_t *attr,
spargv[i] = NULL;
pid_t pid;
- TEST_COMPARE (posix_spawn (&pid, argv[1], actions, attr, spargv, environ),
+ TEST_COMPARE (POSIX_SPAWN (&pid, argv[1], actions, attr, spargv, environ),
exp_err);
if (exp_err != 0)
return;
- int status;
- TEST_COMPARE (xwaitpid (pid, &status, WUNTRACED), pid);
- TEST_VERIFY (WIFEXITED (status));
- TEST_VERIFY (!WIFSTOPPED (status));
- TEST_VERIFY (!WIFSIGNALED (status));
- TEST_COMPARE (WEXITSTATUS (status), 0);
+ siginfo_t sinfo;
+ TEST_COMPARE (WAITID (P_ALL, 0, &sinfo, WEXITED), 0);
+ TEST_COMPARE (sinfo.si_code, CLD_EXITED);
+ TEST_COMPARE (sinfo.si_status, 0);
}
static int
@@ -202,7 +201,7 @@ do_test (int argc, char *argv[])
if (restart)
return handle_restart (argv[1], argv[2]);
- pid_t pid = xfork ();
+ PID_T_TYPE pid = xfork ();
if (pid == 0)
{
/* Create a pseudo-terminal to avoid interfering with the one using by
@@ -24,7 +24,9 @@
#include <support/check.h>
#include <support/xsignal.h>
#include <support/xunistd.h>
+#include <sys/wait.h>
#include <unistd.h>
+#include <tst-spawn.h>
/* Nonzero if the program gets called via `exec'. */
#define CMDLINE_OPTIONS \
@@ -81,14 +83,13 @@ spawn_signal_test (const char *type, const posix_spawnattr_t *attr)
{
spargs[check_type_argc] = (char*) type;
- pid_t pid;
- int status;
+ PID_T_TYPE pid;
+ siginfo_t sinfo;
TEST_COMPARE (posix_spawn (&pid, spargs[0], NULL, attr, spargs, environ), 0);
- TEST_COMPARE (xwaitpid (pid, &status, 0), pid);
- TEST_VERIFY (WIFEXITED (status));
- TEST_VERIFY (!WIFSIGNALED (status));
- TEST_COMPARE (WEXITSTATUS (status), 0);
+ TEST_COMPARE (WAITID (P_ALL, 0, &sinfo, WEXITED), 0);
+ TEST_COMPARE (sinfo.si_code, CLD_EXITED);
+ TEST_COMPARE (sinfo.si_status, 0);
}
static void
@@ -62,6 +62,7 @@ sysdep_routines += \
clock_adjtime \
clone \
clone-internal \
+ clone-pidfd-support \
clone3 \
closefrom_fallback \
convert_scm_timestamps \
@@ -492,6 +493,8 @@ sysdep_headers += \
sysdep_routines += \
getcpu \
oldglob \
+ pidfd_spawn \
+ pidfd_spawnp \
sched_getcpu \
spawnattr_getcgroup_np \
spawnattr_setcgroup_np \
@@ -500,7 +503,16 @@ sysdep_routines += \
tests += \
tst-affinity \
tst-affinity-pid \
+ tst-posix_spawn-setsid-pidfd \
tst-spawn-cgroup \
+ tst-spawn-chdir-pidfd \
+ tst-spawn-pidfd \
+ tst-spawn2-pidfd \
+ tst-spawn3-pidfd \
+ tst-spawn4-pidfd \
+ tst-spawn5-pidfd \
+ tst-spawn6-pidfd \
+ tst-spawn7-pidfd \
# tests
tests-static += \
@@ -514,8 +526,14 @@ tests += \
CFLAGS-fork.c = $(libio-mtsafe)
CFLAGS-getpid.o = -fomit-frame-pointer
CFLAGS-getpid.os = -fomit-frame-pointer
+CFLAGS-tst-spawn3-pidfd.c += -DOBJPFX=\"$(objpfx)\"
tst-spawn-cgroup-ARGS = -- $(host-test-program-cmd)
+tst-spawn-pidfd-ARGS = -- $(host-test-program-cmd)
+tst-spawn5-pidfd-ARGS = -- $(host-test-program-cmd)
+tst-spawn6-pidfd-ARGS = -- $(host-test-program-cmd)
+tst-spawn7-pidfd-ARGS = -- $(host-test-program-cmd)
+tst-posix_spawn-setsid-pidfd-ARGS = -- $(host-test-program-cmd)
endif
ifeq ($(subdir),inet)
@@ -324,6 +324,8 @@ libc {
GLIBC_2.38 {
posix_spawnattr_getcgroup_np;
posix_spawnattr_setcgroup_np;
+ pidfd_spawn;
+ pidfd_spawnp;
}
GLIBC_PRIVATE {
# functions used in other libraries
@@ -2669,6 +2669,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2778,6 +2778,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2430,6 +2430,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -550,6 +550,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -547,6 +547,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -37,4 +37,24 @@ extern int posix_spawnattr_setcgroup_np (posix_spawnattr_t *__restrict __attr,
#endif /* __USE_MISC */
+#ifdef __USE_GNU
+
+extern int pidfd_spawn (int *__restrict __pidfd,
+ const char *__restrict __file,
+ const posix_spawn_file_actions_t *__restrict __facts,
+ const posix_spawnattr_t *__restrict __attrp,
+ char *const __argv[__restrict_arr],
+ char *const __envp[__restrict_arr])
+ __nonnull ((2, 5));
+
+extern int pidfd_spawnp (int *__restrict __pidfd,
+ const char *__restrict __path,
+ const posix_spawn_file_actions_t *__restrict __facts,
+ const posix_spawnattr_t *__restrict __attrp,
+ char *const __argv[__restrict_arr],
+ char *const __envp[__restrict_arr])
+ __nonnull ((2, 5));
+
+#endif /* __USE_GNU */
+
__END_DECLS
new file mode 100644
@@ -0,0 +1,58 @@
+/* Check if kernel supports PID file descriptors.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <atomic.h>
+#include <sys/wait.h>
+#include <sysdep.h>
+
+/* The PID file descriptors was added during multiple releases:
+ - Linux 5.2 added CLONE_PIDFD support for clone and __clone_pidfd_supported
+ syscall.
+ - Linux 5.3 added support for poll and CLONE_PIDFD for clone3.
+ - Linux 5.4 added P_PIDFD support on waitid.
+
+ For internal usage on spawn and fork, it only make sense to return a file
+ descriptor if caller can actually waitid on it. */
+bool
+__clone_pidfd_supported (void)
+{
+ static int supported = 0;
+ int state = atomic_load_relaxed (&supported);
+ if (state == 0)
+ {
+ /* Linux define the maximum allocated file descriptor value as
+ 0x7fffffc0 (from fs/file.c):
+
+ #define __const_min(x, y) ((x) < (y) ? (x) : (y))
+ unsigned int sysctl_nr_open_max =
+ __const_min(INT_MAX, ~(size_t)0/sizeof(void *)) & -BITS_PER_LONG;
+
+ So we can detect whether kernel supports all pidfd interfaces by
+ using a valid but never allocated file descriptor: if is not
+ supported waitid will return EINVAL, otherwise EBADF.
+
+ Also the waitid is a cancellation entrypoint, so issue the syscall
+ directly. */
+ int r = INTERNAL_SYSCALL_CALL (waitid, P_PIDFD, INT_MAX, NULL,
+ WEXITED | WNOHANG, NULL);
+ state = r == -EBADF ? 1 : -1;
+ atomic_store_relaxed (&supported, state);
+ }
+
+ return state == 1;
+}
@@ -2706,6 +2706,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2655,6 +2655,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2839,6 +2839,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2604,6 +2604,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2190,6 +2190,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -551,6 +551,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2782,6 +2782,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2755,6 +2755,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2752,6 +2752,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2747,6 +2747,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2745,6 +2745,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2753,6 +2753,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2655,6 +2655,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2794,6 +2794,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2176,6 +2176,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
new file mode 100644
@@ -0,0 +1,30 @@
+/* pidfd_spawn - Spawn a process and return a pid file descriptor.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <spawn.h>
+#include "spawn_int.h"
+
+int
+pidfd_spawn (int *pidfd, const char *path,
+ const posix_spawn_file_actions_t *file_actions,
+ const posix_spawnattr_t *attrp, char *const argv[],
+ char *const envp[])
+{
+ return __spawni (pidfd, path, file_actions, attrp, argv, envp,
+ SPAWN_XFLAGS_RET_PIDFD);
+}
new file mode 100644
@@ -0,0 +1,30 @@
+/* pidfd_spawnp - Spawn a process and return a pid file descriptor.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <spawn.h>
+#include "spawn_int.h"
+
+int
+pidfd_spawnp (int *pidfd, const char *path,
+ const posix_spawn_file_actions_t *file_actions,
+ const posix_spawnattr_t *attrp, char *const argv[],
+ char *const envp[])
+{
+ return __spawni (pidfd, path, file_actions, attrp, argv, envp,
+ SPAWN_XFLAGS_USE_PATH | SPAWN_XFLAGS_RET_PIDFD);
+}
@@ -2821,6 +2821,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2854,6 +2854,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2575,6 +2575,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2889,6 +2889,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2432,6 +2432,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2632,6 +2632,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2819,6 +2819,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2612,6 +2612,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2662,6 +2662,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2659,6 +2659,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2814,6 +2814,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2627,6 +2627,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -68,6 +68,7 @@ struct posix_spawn_args
int xflags;
bool use_clone3;
int err;
+ int pidfd;
};
/* Older version requires that shell script without shebang definition
@@ -309,7 +310,7 @@ fail:
/* Spawn a new process executing PATH with the attributes describes in *ATTRP.
Before running the process perform the actions described in FILE-ACTIONS. */
static int
-__spawnix (pid_t * pid, const char *file,
+__spawnix (int *pid, const char *file,
const posix_spawn_file_actions_t * file_actions,
const posix_spawnattr_t * attrp, char *const argv[],
char *const envp[], int xflags,
@@ -319,6 +320,15 @@ __spawnix (pid_t * pid, const char *file,
struct posix_spawn_args args;
int ec;
+ bool use_pidfd = xflags & SPAWN_XFLAGS_RET_PIDFD;
+
+ /* For CLONE_PIDFD, older kernels might not fail with unsupported flags or
+ some versions might not support waitid (P_PIDFD). So to avoid the need
+ to handle the error on the helper process, check for full pidfd
+ support. */
+ if (use_pidfd && !__clone_pidfd_supported ())
+ return ENOSYS;
+
/* To avoid imposing hard limits on posix_spawn{p} the total number of
arguments is first calculated to allocate a mmap to hold all possible
values. */
@@ -368,6 +378,7 @@ __spawnix (pid_t * pid, const char *file,
args.argv = argv;
args.argc = argc;
args.envp = envp;
+ args.pidfd = 0;
args.xflags = xflags;
internal_signal_block_all (&args.oldmask);
@@ -386,13 +397,16 @@ __spawnix (pid_t * pid, const char *file,
/* Unsupported flags like CLONE_CLEAR_SIGHAND will be cleared up by
__clone_internal_fallback. */
.flags = (set_cgroup ? CLONE_INTO_CGROUP : 0)
+ | (use_pidfd ? CLONE_PIDFD : 0)
| CLONE_CLEAR_SIGHAND
| CLONE_VM
| CLONE_VFORK,
.exit_signal = SIGCHLD,
.stack = (uintptr_t) stack,
.stack_size = stack_size,
- .cgroup = (set_cgroup ? attrp->__cgroup : 0)
+ .cgroup = (set_cgroup ? attrp->__cgroup : 0),
+ .pidfd = use_pidfd ? (uintptr_t) &args.pidfd : 0,
+ .parent_tid = use_pidfd ? (uintptr_t) &args.pidfd : 0,
};
#ifdef HAVE_CLONE3_WRAPPER
args.use_clone3 = true;
@@ -443,7 +457,7 @@ __spawnix (pid_t * pid, const char *file,
__munmap (stack, stack_size);
if ((ec == 0) && (pid != NULL))
- *pid = new_pid;
+ *pid = use_pidfd ? args.pidfd : new_pid;
internal_signal_restore_set (&args.oldmask);
new file mode 100644
@@ -0,0 +1,20 @@
+/* Tests for spawn pidfd extension.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <tst-spawn-pidfd.h>
+#include <posix/tst-posix_spawn-setsid.c>
new file mode 100644
@@ -0,0 +1,20 @@
+/* Tests for spawn pidfd extension.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <tst-spawn-pidfd.h>
+#include <posix/tst-spawn-chdir.c>
new file mode 100644
@@ -0,0 +1,20 @@
+/* Tests for spawn pidfd extension.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <tst-spawn-pidfd.h>
+#include <posix/tst-spawn.c>
new file mode 100644
@@ -0,0 +1,63 @@
+/* Tests for spawn pidfd extension.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <spawn.h>
+#include <support/check.h>
+
+#define PID_T_TYPE int
+
+/* Call posix_spawn with POSIX_SPAWN_PIDFD set. */
+static inline int
+pidfd_spawn_check (int *pidfd, const char *path,
+ const posix_spawn_file_actions_t *fa,
+ const posix_spawnattr_t *attr, char *const argv[],
+ char *const envp[])
+{
+ int r = pidfd_spawn (pidfd, path, fa, attr, argv, envp);
+ if (r == ENOSYS)
+ FAIL_UNSUPPORTED ("kernel does not support CLONE_PIDFD clone flag");
+ return r;
+}
+
+#define POSIX_SPAWN(__pidfd, __path, __actions, __attr, __argv, __envp) \
+ pidfd_spawn_check (__pidfd, __path, __actions, __attr, __argv, __envp)
+
+static inline int
+pidfd_spawnp_check (int *pidfd, const char *file,
+ const posix_spawn_file_actions_t *fa,
+ const posix_spawnattr_t *attr,
+ char *const argv[], char *const envp[])
+{
+ int r = pidfd_spawnp (pidfd, file, fa, attr, argv, envp);
+ if (r == ENOSYS)
+ FAIL_UNSUPPORTED ("kernel does not support CLONE_PIDFD clone flag");
+ return r;
+}
+
+#define POSIX_SPAWNP(__child, __path, __actions, __attr, __argv, __envp) \
+ pidfd_spawnp_check (__child, __path, __actions, __attr, __argv, __envp)
+
+#define WAITID(__idtype, __id, __info, __opts) \
+ ({ \
+ __typeof (__idtype) __new_idtype = __idtype == P_PID \
+ ? P_PIDFD : __idtype; \
+ waitid (__new_idtype, __id, __info, __opts); \
+ })
+
+#define TST_SPAWN_PIDFD 1
new file mode 100644
@@ -0,0 +1,20 @@
+/* Tests for spawn pidfd extension.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <tst-spawn-pidfd.h>
+#include <posix/tst-spawn2.c>
new file mode 100644
@@ -0,0 +1,20 @@
+/* Check posix_spawn add file actions.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <tst-spawn-pidfd.h>
+#include <posix/tst-spawn3.c>
new file mode 100644
@@ -0,0 +1,20 @@
+/* Tests for spawn pidfd extension.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <tst-spawn-pidfd.h>
+#include <posix/tst-spawn4.c>
new file mode 100644
@@ -0,0 +1,20 @@
+/* Tests for spawn pidfd extension.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <tst-spawn-pidfd.h>
+#include <posix/tst-spawn5.c>
new file mode 100644
@@ -0,0 +1,20 @@
+/* Tests for spawn pidfd extension.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <tst-spawn-pidfd.h>
+#include <posix/tst-spawn6.c>
new file mode 100644
@@ -0,0 +1,20 @@
+/* Tests for spawn pidfd extension.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <tst-spawn-pidfd.h>
+#include <posix/tst-spawn7.c>
@@ -2578,6 +2578,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
@@ -2684,6 +2684,8 @@ GLIBC_2.38 __strlcat_chk F
GLIBC_2.38 __strlcpy_chk F
GLIBC_2.38 __wcslcat_chk F
GLIBC_2.38 __wcslcpy_chk F
+GLIBC_2.38 pidfd_spawn F
+GLIBC_2.38 pidfd_spawnp F
GLIBC_2.38 posix_spawnattr_getcgroup_np F
GLIBC_2.38 posix_spawnattr_setcgroup_np F
GLIBC_2.38 strlcat F
Returning a pidfd allows a process to keep a race-free handle to a child process, otherwise the caller will need to either use pidfd_open (which still might be subject to TOCTOU) or keep the old racy interface base on pid_t. The implementation makes sure that kernel must support the complete pidfd interface, meaning that waitid (P_PIDFD) should be supported (added on Linux 5.4). It ensures that non racy workaround is required (such as reading procfs fdinfo pid to use along with old wait interfaces). These interfaces are similar to the posix_spawn and posix_spawnp, with the only different diferent being it returns a process file descriptor (int) instead of process ID (pid_t). Their prototypes are: int pidfd_spawn (int *restrict pidfd, const char *restrict file, const posix_spawn_file_actions_t *restrict facts, const posix_spawnattr_t *restrict attrp, char *const argv[restrict], char *const envp[restrict]) int pidfd_spawnp (int *restrict pidfd, const char *restrict path, const posix_spawn_file_actions_t *restrict facts, const posix_spawnattr_t *restrict attrp, char *const argv[restrict_arr], char *const envp[restrict_arr]); A new symbol is used instead of a posix_spawn extension to avoid possible issue with language bindings that might track the return argument lifetime. Although, on Linux pid_t and int are interchangeable, POSIX only state that pid_t should be a signed interger. Both symbols reuse the posix_spawn posix_spawn_file_actions_t and posix_spawnattr_t, to void rehash posix_spawn API or add a new one. It also mean that both interfaces support the same attribute and file actions, and a new flag or file actions on posix_spawn is also added automatically for pidfd_spawn. Also, using posix_spawn plumbering allows to reuse most of the current testing with some changes: - waitid is used instead of waitpid, since it is a more generic interface. - tst-posix_spawn-setsid.c is adapted to take in consideration that caller can check for session id directly. The test now spawn itself and write the session id a file instead. - tst-spawn3.c need to know where pidfd_spawn is used so it keep an extra file description ununsed. Checked on x86_64-linux-gnu on Linux 4.15 (no CLONE_PID or waitid support), Linux 5.15 (only clone support), and Linux 5.19 (full support including clone3). --- NEWS | 7 + include/clone_internal.h | 4 + manual/process.texi | 14 +- posix/Makefile | 1 + posix/spawn_int.h | 3 +- posix/tst-posix_spawn-setsid.c | 168 +++++++++++++----- posix/tst-spawn-chdir.c | 15 +- posix/tst-spawn.c | 24 +-- posix/tst-spawn.h | 36 ++++ posix/tst-spawn2.c | 17 +- posix/tst-spawn3.c | 100 ++++++----- posix/tst-spawn4.c | 7 +- posix/tst-spawn5.c | 14 +- posix/tst-spawn6.c | 15 +- posix/tst-spawn7.c | 13 +- sysdeps/unix/sysv/linux/Makefile | 18 ++ sysdeps/unix/sysv/linux/Versions | 2 + sysdeps/unix/sysv/linux/aarch64/libc.abilist | 2 + sysdeps/unix/sysv/linux/alpha/libc.abilist | 2 + sysdeps/unix/sysv/linux/arc/libc.abilist | 2 + sysdeps/unix/sysv/linux/arm/be/libc.abilist | 2 + sysdeps/unix/sysv/linux/arm/le/libc.abilist | 2 + sysdeps/unix/sysv/linux/bits/spawn_ext.h | 20 +++ sysdeps/unix/sysv/linux/clone-pidfd-support.c | 58 ++++++ sysdeps/unix/sysv/linux/csky/libc.abilist | 2 + sysdeps/unix/sysv/linux/hppa/libc.abilist | 2 + sysdeps/unix/sysv/linux/i386/libc.abilist | 2 + sysdeps/unix/sysv/linux/ia64/libc.abilist | 2 + .../sysv/linux/loongarch/lp64/libc.abilist | 2 + .../sysv/linux/m68k/coldfire/libc.abilist | 2 + .../unix/sysv/linux/m68k/m680x0/libc.abilist | 2 + .../sysv/linux/microblaze/be/libc.abilist | 2 + .../sysv/linux/microblaze/le/libc.abilist | 2 + .../sysv/linux/mips/mips32/fpu/libc.abilist | 2 + .../sysv/linux/mips/mips32/nofpu/libc.abilist | 2 + .../sysv/linux/mips/mips64/n32/libc.abilist | 2 + .../sysv/linux/mips/mips64/n64/libc.abilist | 2 + sysdeps/unix/sysv/linux/nios2/libc.abilist | 2 + sysdeps/unix/sysv/linux/or1k/libc.abilist | 2 + sysdeps/unix/sysv/linux/pidfd_spawn.c | 30 ++++ sysdeps/unix/sysv/linux/pidfd_spawnp.c | 30 ++++ .../linux/powerpc/powerpc32/fpu/libc.abilist | 2 + .../powerpc/powerpc32/nofpu/libc.abilist | 2 + .../linux/powerpc/powerpc64/be/libc.abilist | 2 + .../linux/powerpc/powerpc64/le/libc.abilist | 2 + .../unix/sysv/linux/riscv/rv32/libc.abilist | 2 + .../unix/sysv/linux/riscv/rv64/libc.abilist | 2 + .../unix/sysv/linux/s390/s390-32/libc.abilist | 2 + .../unix/sysv/linux/s390/s390-64/libc.abilist | 2 + sysdeps/unix/sysv/linux/sh/be/libc.abilist | 2 + sysdeps/unix/sysv/linux/sh/le/libc.abilist | 2 + .../sysv/linux/sparc/sparc32/libc.abilist | 2 + .../sysv/linux/sparc/sparc64/libc.abilist | 2 + sysdeps/unix/sysv/linux/spawni.c | 20 ++- .../sysv/linux/tst-posix_spawn-setsid-pidfd.c | 20 +++ .../unix/sysv/linux/tst-spawn-chdir-pidfd.c | 20 +++ sysdeps/unix/sysv/linux/tst-spawn-pidfd.c | 20 +++ sysdeps/unix/sysv/linux/tst-spawn-pidfd.h | 63 +++++++ sysdeps/unix/sysv/linux/tst-spawn2-pidfd.c | 20 +++ sysdeps/unix/sysv/linux/tst-spawn3-pidfd.c | 20 +++ sysdeps/unix/sysv/linux/tst-spawn4-pidfd.c | 20 +++ sysdeps/unix/sysv/linux/tst-spawn5-pidfd.c | 20 +++ sysdeps/unix/sysv/linux/tst-spawn6-pidfd.c | 20 +++ sysdeps/unix/sysv/linux/tst-spawn7-pidfd.c | 20 +++ .../unix/sysv/linux/x86_64/64/libc.abilist | 2 + .../unix/sysv/linux/x86_64/x32/libc.abilist | 2 + 66 files changed, 776 insertions(+), 151 deletions(-) create mode 100644 posix/tst-spawn.h create mode 100644 sysdeps/unix/sysv/linux/clone-pidfd-support.c create mode 100644 sysdeps/unix/sysv/linux/pidfd_spawn.c create mode 100644 sysdeps/unix/sysv/linux/pidfd_spawnp.c create mode 100644 sysdeps/unix/sysv/linux/tst-posix_spawn-setsid-pidfd.c create mode 100644 sysdeps/unix/sysv/linux/tst-spawn-chdir-pidfd.c create mode 100644 sysdeps/unix/sysv/linux/tst-spawn-pidfd.c create mode 100644 sysdeps/unix/sysv/linux/tst-spawn-pidfd.h create mode 100644 sysdeps/unix/sysv/linux/tst-spawn2-pidfd.c create mode 100644 sysdeps/unix/sysv/linux/tst-spawn3-pidfd.c create mode 100644 sysdeps/unix/sysv/linux/tst-spawn4-pidfd.c create mode 100644 sysdeps/unix/sysv/linux/tst-spawn5-pidfd.c create mode 100644 sysdeps/unix/sysv/linux/tst-spawn6-pidfd.c create mode 100644 sysdeps/unix/sysv/linux/tst-spawn7-pidfd.c