@@ -351,7 +351,9 @@ endif
endif
tests-container += \
- tst-popen3
+ tst-popen3 \
+ tst-setvbuf2 \
+ tst-setvbuf2-ind
# tests-container
generated += \
@@ -363,6 +365,8 @@ generated += \
tests-internal = \
tst-grouping_iterator \
+ tst-setvbuf2 \
+ tst-setvbuf2-ind \
# tests-internal
test-srcs = \
@@ -710,6 +714,10 @@ $(objpfx)tst-setvbuf1-cmp.out: tst-setvbuf1.expect $(objpfx)tst-setvbuf1.out
cmp $^ > $@; \
$(evaluate-test)
+CFLAGS-tst-setvbuf2.c += -DIND_PROC=\"$(objpfx)tst-setvbuf2-ind\"
+$(objpfx)tst-setvbuf2-ind : $(objpfx)tst-setvbuf2-ind.o
+$(objpfx)tst-setvbuf2.out: $(objpfx)tst-setvbuf2-ind
+
$(objpfx)tst-printf-round: $(libm)
$(objpfx)tst-scanf-round: $(libm)
new file mode 100644
@@ -0,0 +1,2 @@
+#define INDEPENDENT_PART 1
+#include "tst-setvbuf2.c"
new file mode 100644
@@ -0,0 +1,1036 @@
+/* Test setvbuf under various conditions.
+ Copyright (C) 2025 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/>. */
+
+/* This file is used twice, once as the test itself (where do_test
+ is defined) and once as a subprocess we spawn to test stdin et all
+ (where main is defined). INDEPENDENT_PART is defined for the
+ latter.
+
+ Note also that the purpose of this test is to test setvbuf, not the
+ underlying buffering code. */
+
+#include <dlfcn.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdio_ext.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <errno.h>
+#include <signal.h>
+#include <libio.h>
+#include <termios.h>
+
+#include <support/support.h>
+#include <support/check.h>
+#include <support/temp_file.h>
+#include <support/xstdio.h>
+#include <support/xunistd.h>
+#include <support/xthread.h>
+#include <support/tty.h>
+
+/* Dear future developer: If you are reading this, you are likely
+ trying to change or understand this test. In that case, these
+ debug/dump macros will be helpful. */
+#if 0
+#define debug printf ("\033[3%dm%s:%d\033[0m\n", \
+ (__LINE__%6)+1,__FUNCTION__, __LINE__);
+
+static void
+dumpfp (FILE *fp)
+{
+ char f[10], *p=f;
+
+ if (fp->_flags & _IO_UNBUFFERED)
+ *p++ = 'N';
+ if (fp->_flags & _IO_LINE_BUF)
+ *p++ = 'L';
+ if (p == f)
+ *p++ = 'B';
+ *p = 0;
+
+ printf ("FILE %p flags %s"
+ " read %p \033[%dm%+ld \033[%dm%+ld\033[0m"
+ " write %p \033[%dm%+ld \033[%dm%+ld\033[0m %ld"
+ " buf %p \033[%dm%+ld\033[0m sz %ld pend %ld\n",
+ fp, f,
+
+ fp->_IO_read_base,
+ fp->_IO_read_ptr == fp->_IO_read_base ? 33 : 32,
+ fp->_IO_read_ptr - fp->_IO_read_base,
+ fp->_IO_read_end == fp->_IO_read_base ? 33 : 36,
+ fp->_IO_read_end - fp->_IO_read_base,
+
+ fp->_IO_write_base,
+ fp->_IO_write_ptr == fp->_IO_write_base ? 33 : 32,
+ fp->_IO_write_ptr - fp->_IO_write_base,
+ fp->_IO_write_end == fp->_IO_write_base ? 33 : 36,
+ fp->_IO_write_end - fp->_IO_write_base,
+ fp->_IO_write_end - fp->_IO_write_base,
+
+ fp->_IO_buf_base,
+ fp->_IO_buf_end == fp->_IO_buf_base ? 33 : 35,
+ fp->_IO_buf_end - fp->_IO_buf_base,
+ __fbufsize (fp), __fpending (fp)
+ );
+}
+#else
+#define debug
+#define dumpfp(FP)
+#endif
+
+#ifndef INDEPENDENT_PART
+/* st_blksize value for that file, or BUFSIZ if out of range. */
+static int blksize = BUFSIZ;
+#endif
+
+/* Our test buffer. */
+#define TEST_BUFSIZE 42
+static int bufsize = TEST_BUFSIZE < BUFSIZ ? TEST_BUFSIZE : BUFSIZ;
+static char *buffer;
+
+/* Test data, both written to that file and used as an in-memory
+ stream. */
+char test_data[2 * BUFSIZ];
+
+#define TEST_STRING "abcdef\n"
+
+enum test_source_case
+ {
+ test_source_file,
+ test_source_pipe,
+ test_source_fifo,
+ test_source_pseudo_terminal,
+ test_source_dev_null,
+ test_source_count,
+ };
+
+static const char *const test_source_name[test_source_count] =
+ {
+ "regular file",
+ "pipe",
+ "fifo",
+ "pseudo_terminal",
+ "dev_null"
+ };
+
+enum test_stream_case
+ {
+ test_stream_stdin,
+ test_stream_stdout,
+ test_stream_stderr,
+ test_stream_fopen_r,
+ test_stream_fdopen_r,
+ test_stream_fopen_w,
+ test_stream_fdopen_w,
+ test_stream_count
+ };
+
+static bool test_stream_reads[test_stream_count] =
+ {
+ true,
+ false,
+ false,
+ true,
+ true,
+ false,
+ false
+ };
+
+static const char *const test_stream_name[test_stream_count] =
+ {
+ "stdin",
+ "stdout",
+ "stderr",
+ "fopen (read)",
+ "fdopen (read)",
+ "fopen (write)",
+ "fdopen (write)"
+ };
+
+enum test_config_case
+ {
+ test_config_none,
+ test_config_unbuffered,
+ test_config_line,
+ test_config_fully,
+ test_config_count
+ };
+
+static const char *const test_config_name[test_config_count] =
+ {
+ "no change",
+ "unbuffered",
+ "line buffered",
+ "fully buffered"
+ };
+
+FILE *test_stream;
+
+char *test_file_name = NULL;
+int pty_fd;
+char *test_pipe_name = NULL;
+int test_pipe[2];
+
+/* This is either -1 or represents a pre-opened file descriptor for
+ the test as returned by prepare_test_file. */
+int test_fd;
+
+/*------------------------------------------------------------*/
+
+/* Note that throughout this test we reopen, remove, and change
+ to/from a fifo, the test file. This would normally cause a race
+ condition, except that we're in a test container. No other process
+ can run in the test container simultaneously. */
+
+void
+prepare_test_data (void)
+{
+ buffer = (char *) malloc (bufsize);
+
+#ifndef INDEPENDENT_PART
+ /* Both file and pipe need this. */
+ if (test_file_name == NULL)
+ {
+ debug;
+ int fd = create_temp_file ("tst-setvbuf2", &test_file_name);
+ TEST_VERIFY_EXIT (fd != -1);
+ struct stat64 st;
+ xfstat64 (fd, &st);
+ if (st.st_blksize > 0 && st.st_blksize < BUFSIZ)
+ blksize = st.st_blksize;
+ xclose (fd);
+ }
+#endif
+
+ for (size_t i = 0; i < 2 * BUFSIZ; i++)
+ {
+ unsigned char c = TEST_STRING[i % strlen (TEST_STRING)];
+ test_data[i] = c;
+ }
+}
+
+#ifndef INDEPENDENT_PART
+
+/* These functions provide a source/sink for the "other" side of any
+ pipe-style descriptor we're using for test. */
+
+static pthread_t writer_thread_tid = 0;
+static pthread_t reader_thread_tid = 0;
+
+typedef struct {
+ int fd;
+ const char *fname;
+} ThreadData;
+/* It's OK if this is static, we only run one at a time. */
+ThreadData thread_data;
+
+static void *
+writer_thread_proc (void *closure)
+{
+ ThreadData *td = (ThreadData *) closure;
+ int fd;
+ int i;
+ ssize_t wn;
+ debug;
+
+ if (td->fname)
+ td->fd = xopen (td->fname, O_WRONLY, 0777);
+ fd = td->fd;
+
+ while (1)
+ {
+ i = 0;
+ while (i < BUFSIZ)
+ {
+ wn = write (fd, test_data+i, BUFSIZ-i);
+ if (wn <= 0)
+ break;
+ i += wn;
+ }
+ }
+ return NULL;
+}
+
+static void *
+reader_thread_proc (void *closure)
+{
+ ThreadData *td = (ThreadData *) closure;
+ int fd;
+ ssize_t rn;
+ int n = 0;
+ debug;
+
+ if (td->fname)
+ td->fd = xopen (td->fname, O_RDONLY, 0777);
+ fd = td->fd;
+
+ while (1)
+ {
+ char buf[BUFSIZ];
+ rn = read (fd, buf, BUFSIZ);
+ if (rn <= 0)
+ break;
+ TEST_COMPARE_BLOB (buf, rn, test_data+n, rn);
+ n += rn;
+ }
+ return NULL;
+}
+
+static void
+start_writer_thread (int fd)
+{
+ debug;
+ thread_data.fd = fd;
+ thread_data.fname = NULL;
+ writer_thread_tid = xpthread_create (NULL, writer_thread_proc,
+ (void *)& thread_data);
+}
+
+static void
+start_writer_thread_n (const char *fname)
+{
+ debug;
+ thread_data.fd = 0;
+ thread_data.fname = fname;
+ writer_thread_tid = xpthread_create (NULL, writer_thread_proc,
+ (void *)& thread_data);
+}
+
+static void
+end_writer_thread (void)
+{
+ debug;
+ if (writer_thread_tid)
+ {
+ pthread_cancel (writer_thread_tid);
+ xpthread_join (writer_thread_tid);
+ xclose (thread_data.fd);
+ writer_thread_tid = 0;
+ }
+}
+
+static void
+start_reader_thread (int fd)
+{
+ debug;
+ thread_data.fd = fd;
+ thread_data.fname = NULL;
+ reader_thread_tid = xpthread_create (NULL, reader_thread_proc,
+ (void *)& thread_data);
+}
+
+static void
+start_reader_thread_n (const char *fname)
+{
+ debug;
+ thread_data.fd = 0;
+ thread_data.fname = fname;
+ reader_thread_tid = xpthread_create (NULL, reader_thread_proc,
+ (void *)& thread_data);
+}
+
+static void
+end_reader_thread (void)
+{
+ debug;
+ if (reader_thread_tid)
+ {
+ pthread_cancel (reader_thread_tid);
+ xpthread_join (reader_thread_tid);
+ xclose (thread_data.fd);
+ reader_thread_tid = 0;
+ }
+}
+
+/*------------------------------------------------------------*/
+
+/* These two functions are reponsible for choosing a file to be tested
+ against, typically by returning a filename but in a few cases also
+ providing a file descriptor (i.e. for fdopen). */
+
+static const char *
+prepare_test_file (enum test_source_case f, enum test_stream_case s)
+{
+ debug;
+
+ test_fd = -1;
+
+ switch (f)
+ {
+ case test_source_file:
+ {
+ if (test_stream_reads[f])
+ {
+ debug;
+ FILE *fp = xfopen (test_file_name, "w");
+ TEST_VERIFY_EXIT (fwrite (test_data, 1, 2 * BUFSIZ, fp)
+ == 2 * BUFSIZ);
+ xfclose (fp);
+ }
+ debug;
+ return test_file_name;
+ }
+
+ case test_source_pipe:
+ {
+ debug;
+ TEST_COMPARE (pipe (test_pipe), 0);
+ if (test_stream_reads[s])
+ {
+ start_writer_thread (test_pipe[1]);
+ test_fd = test_pipe[0];
+ }
+ else
+ {
+ start_reader_thread (test_pipe[0]);
+ test_fd = test_pipe[1];
+ }
+ test_pipe_name = xasprintf ("/proc/self/fd/%d", test_fd);
+ debug;
+ return test_pipe_name;
+ }
+
+ case test_source_fifo:
+ {
+ /* We do not want to fail/exit if the file doesn't exist. */
+ unlink (test_file_name);
+ if (mknod (test_file_name, S_IFIFO | 0600, 0) != 0)
+ FAIL_EXIT1 ("mknod: %m");
+ debug;
+ if (test_stream_reads[s])
+ start_writer_thread_n (test_file_name);
+ else
+ start_reader_thread_n (test_file_name);
+ debug;
+ return test_file_name;
+ }
+
+ case test_source_pseudo_terminal:
+ {
+ support_openpty (&pty_fd, &test_fd, &test_pipe_name, NULL, NULL);
+
+ debug;
+ if (test_stream_reads[s])
+ start_writer_thread (pty_fd);
+ else
+ start_reader_thread (pty_fd);
+
+ debug;
+ return test_pipe_name;
+ }
+
+ case test_source_dev_null:
+ debug;
+ return "/dev/null";
+
+ default:
+ abort ();
+ }
+}
+
+static void
+unprepare_test_file (FILE *fp,
+ enum test_source_case f,
+ enum test_stream_case s)
+{
+ debug;
+ switch (f)
+ {
+ case test_source_file:
+ break;
+
+ case test_source_pipe:
+ free (test_pipe_name);
+ if (test_stream_reads[s])
+ end_writer_thread ();
+ else
+ end_reader_thread ();
+ break;
+
+ case test_source_fifo:
+ if (test_stream_reads[s])
+ end_writer_thread ();
+ else
+ end_reader_thread ();
+ unlink (test_file_name);
+ break;
+
+ case test_source_pseudo_terminal:
+ free (test_pipe_name);
+ if (test_stream_reads[s])
+ end_writer_thread ();
+ else
+ end_reader_thread ();
+ break;
+
+ case test_source_dev_null:
+ break;
+
+ default:
+ abort ();
+ }
+ debug;
+}
+
+/*------------------------------------------------------------*/
+
+/* This function takes a filename and returns a file descriptor,
+ opened according to the method requested. */
+
+static FILE *
+open_test_stream (enum test_source_case f, enum test_stream_case s)
+{
+ int fd;
+ FILE *fp;
+ const char *fname;
+
+ debug;
+ fname = prepare_test_file (f, s);
+ if (fname == NULL)
+ return NULL;
+
+ switch (s)
+ {
+ case test_stream_stdin:
+ fp = fopen (fname, "r");
+ break;
+
+ case test_stream_stdout:
+ fp = fopen (fname, "w");
+ break;
+
+ case test_stream_stderr:
+ fp = fopen (fname, "w");
+ break;
+
+ case test_stream_fopen_r:
+ fp = fopen (fname, "r");
+ break;
+
+ case test_stream_fdopen_r:
+ if (test_fd == -1)
+ fd = xopen (fname, O_RDONLY, 0);
+ else
+ fd = test_fd;
+ fp = fdopen (fd, "r");
+ break;
+
+ case test_stream_fopen_w:
+ fp = fopen (fname, "w");
+ break;
+
+ case test_stream_fdopen_w:
+ fd = xopen (fname, O_WRONLY|O_CREAT|O_TRUNC, 0777);
+ fp = fdopen (fd, "w");
+ break;
+
+ default:
+ abort ();
+ }
+
+ if (f == test_source_pseudo_terminal)
+ {
+ struct termios t;
+ /* We disable the NL to CR-LF conversion so that we can compare
+ data without having to remove the extra CRs. */
+ if (tcgetattr (fileno (fp), &t) < 0)
+ FAIL_EXIT1 ("tcgetattr failed: %m");
+ t.c_oflag &= ~ONLCR;
+ if (tcsetattr (fileno (fp), TCSANOW, &t) < 0)
+ FAIL_EXIT1 ("tcsetattr failed: %m");
+ }
+
+ TEST_VERIFY_EXIT (fp != NULL);
+ debug;
+ printf ("source %s stream %s file %s fd %d\n",
+ test_source_name[f],
+ test_stream_name[s], fname, fileno (fp));
+ return fp;
+}
+
+#endif
+
+/*------------------------------------------------------------*/
+
+/* These functions do the actual testing - setting various buffering
+ options and verifying that they buffer as expected. */
+
+static void
+test_put_string (FILE *fp, const char *s, int count)
+{
+ while (*s && count--)
+ {
+ fputc (*s++, fp);
+ TEST_VERIFY_EXIT (!ferror (fp));
+ }
+}
+
+int
+verify_fully_buffered (FILE *fp,
+ enum test_source_case f,
+ enum test_stream_case s,
+ enum test_config_case c)
+{
+ debug;
+ if (test_stream_reads[s])
+ {
+ char buf[10];
+ dumpfp (fp);
+ size_t fc = fread (buf, 1, 10-1, fp);
+ dumpfp (fp);
+
+ ssize_t count = fp->_IO_read_ptr - fp->_IO_read_base;
+
+ TEST_VERIFY (fp->_IO_read_base != NULL);
+ if (f == test_source_dev_null)
+ {
+ TEST_VERIFY (fc == 0);
+ TEST_VERIFY (count == 0);
+ }
+ else if (f == test_source_pseudo_terminal)
+ {
+ TEST_VERIFY (fc == 9);
+ TEST_VERIFY (count == 3 || count == 10);
+ }
+ else
+ {
+ TEST_VERIFY (fc == 9);
+ TEST_VERIFY (count == 10);
+ }
+
+ /* We already checked for the first character being 'a'. */
+ if (count > 1)
+ {
+ TEST_COMPARE_BLOB (buf, count-1, test_data+1, count-1);
+ TEST_COMPARE_BLOB (fp->_IO_read_base, count, test_data, count);
+ }
+ }
+ else
+ {
+ dumpfp (fp);
+ test_put_string (fp, test_data+1, 10-1);
+ dumpfp (fp);
+ TEST_COMPARE (fp->_IO_write_ptr - fp->_IO_write_base, 10);
+ TEST_COMPARE_BLOB (fp->_IO_write_base, 10, test_data, 10);
+ }
+
+ TEST_COMPARE ((fp->_flags & (_IO_UNBUFFERED | _IO_LINE_BUF)), 0);
+ if (c != test_config_none)
+ TEST_COMPARE (__fbufsize (fp), bufsize);
+ return 0;
+}
+
+int
+verify_line_buffered (FILE *fp,
+ enum test_source_case f,
+ enum test_stream_case s,
+ enum test_config_case c)
+{
+ debug;
+ /* "line buffered" for inputs is not really defined; what you really
+ want here is to control the device providing input. For GLIBC a
+ line-buffered input is treated as fully buffered. */
+ if (test_stream_reads[s])
+ {
+ char buf[10];
+ dumpfp (fp);
+ size_t fc = fread (buf, 1, 10-1, fp);
+ dumpfp (fp);
+
+ ssize_t count = fp->_IO_read_ptr - fp->_IO_read_base;
+
+ TEST_VERIFY (fp->_IO_read_base != NULL);
+ if (f == test_source_dev_null)
+ {
+ TEST_VERIFY (fc == 0);
+ TEST_VERIFY (count == 0);
+ }
+ else if (f == test_source_pseudo_terminal)
+ {
+ TEST_VERIFY (fc == 9);
+ TEST_VERIFY (count == 3 || count == 10);
+ }
+ else
+ {
+ TEST_VERIFY (fc == 9);
+ TEST_VERIFY (count == 10);
+ }
+
+ /* We already checked for the first character being 'a'. */
+ if (count > 1)
+ {
+ TEST_COMPARE_BLOB (buf, count-1, test_data+1, count-1);
+ TEST_COMPARE_BLOB (fp->_IO_read_base, count, test_data, count);
+ }
+ }
+ else
+ {
+ dumpfp (fp);
+ test_put_string (fp, test_data+1, 10-1);
+ dumpfp (fp);
+ TEST_COMPARE (fp->_IO_write_ptr - fp->_IO_write_base, 3);
+ /* The first "abcdef\n" got flushed, leaving "abc". */
+ TEST_COMPARE_BLOB (fp->_IO_write_base, 3, test_data + 7, 3);
+ }
+
+ TEST_COMPARE ((fp->_flags & (_IO_UNBUFFERED | _IO_LINE_BUF)), _IO_LINE_BUF);
+ if (c != test_config_none)
+ TEST_COMPARE (__fbufsize (fp), bufsize);
+ return 0;
+}
+
+int
+verify_unbuffered (FILE *fp,
+ enum test_source_case f,
+ enum test_stream_case s,
+ enum test_config_case c)
+{
+ debug;
+ if (test_stream_reads[s])
+ {
+ /* We've already read one byte. */
+ dumpfp (fp);
+ TEST_VERIFY (fp->_IO_read_base != NULL);
+ if (f == test_source_dev_null)
+ TEST_COMPARE (fp->_IO_read_ptr - fp->_IO_read_base, 0);
+ else
+ {
+ TEST_COMPARE (fp->_IO_read_ptr - fp->_IO_read_base, 1);
+ TEST_COMPARE (fp->_IO_read_base[0], test_data[0]);
+ TEST_VERIFY (fp->_IO_read_ptr == fp->_IO_read_end);
+ }
+ }
+ else
+ {
+ dumpfp (fp);
+ fputc (test_data[1], fp);
+ dumpfp (fp);
+ TEST_COMPARE (fp->_IO_write_ptr - fp->_IO_write_base, 0);
+ TEST_COMPARE (fp->_IO_write_base[0], test_data[1]);
+ TEST_VERIFY (fp->_IO_write_end == fp->_IO_write_base);
+ }
+ TEST_COMPARE ((fp->_flags & (_IO_UNBUFFERED | _IO_LINE_BUF)),
+ _IO_UNBUFFERED);
+ TEST_COMPARE (__fbufsize (fp), 1);
+ return 0;
+}
+
+static int
+do_setvbuf (FILE *fp, void *buf, int flags, int size,
+ enum test_stream_case s)
+{
+ if (s != test_stream_stdout)
+ printf ("SETVBUF %p %p %s %d\n",
+ fp, buf,
+ flags == _IONBF ? "_IONBF"
+ : flags == _IOLBF ? "_IOLBF"
+ : flags == _IOFBF ? "_IOFBF"
+ : "???", size);
+ if (setvbuf (fp, buf, flags, size))
+ {
+ perror ("setvbuf");
+ return 1;
+ }
+ return 0;
+}
+
+int
+do_second_part (FILE *fp,
+ enum test_source_case f,
+ enum test_stream_case s,
+ enum test_config_case c)
+{
+ /* At this point, FP is the stream to test according to the other
+ parameters. */
+
+ int rv = 0;
+ int flags_before;
+ int flags_after;
+
+ debug;
+
+ flags_before = fp->_flags & (_IO_UNBUFFERED | _IO_LINE_BUF);
+
+ /* This is where we do the thing we're testing for. */
+ switch (c)
+ {
+ case test_config_none:
+ /* Buffering is unchanged. */
+ break;
+
+ case test_config_unbuffered:
+ do_setvbuf (fp, NULL, _IONBF, 0, s);
+ break;
+
+ case test_config_line:
+ do_setvbuf (fp, buffer, _IOLBF, bufsize, s);
+ break;
+
+ case test_config_fully:
+ do_setvbuf (fp, buffer, _IOFBF, bufsize, s);
+ break;
+
+ default:
+ abort ();
+ }
+
+ flags_after = fp->_flags & (_IO_UNBUFFERED | _IO_LINE_BUF);
+
+ /* Check the buffer mode after we touch it, if we touched it. */
+ switch (c)
+ {
+ case test_config_none:
+ /* Buffering is unchanged, but may change on the first read/write. */
+ TEST_COMPARE (flags_after, flags_before);
+ break;
+
+ case test_config_unbuffered:
+ TEST_COMPARE (flags_after, _IO_UNBUFFERED);
+ break;
+
+ case test_config_line:
+ TEST_COMPARE (flags_after, _IO_LINE_BUF);
+ break;
+
+ case test_config_fully:
+ TEST_COMPARE (flags_after, 0);
+ break;
+
+ default:
+ abort ();
+ }
+
+ /* Glibc defers calculating the appropriate buffering mechanism
+ until it reads from or writes to the device. So we read one
+ character here, and account for that in the tests. */
+ if (test_stream_reads[s])
+ {
+ dumpfp (fp);
+ int c = fgetc (fp);
+ if (c != TEST_STRING[0] && f != test_source_dev_null)
+ FAIL ("first char read is %c not %c", c, TEST_STRING[0]);
+ dumpfp (fp);
+ }
+ else
+ {
+ dumpfp (fp);
+ fputc (TEST_STRING[0], fp);
+ dumpfp (fp);
+ }
+
+ switch (fp->_flags & (_IO_UNBUFFERED | _IO_LINE_BUF))
+ {
+ case _IO_LINE_BUF:
+ rv += verify_line_buffered (fp, f, s, c);
+ break;
+
+ case _IO_UNBUFFERED:
+ rv += verify_unbuffered (fp, f, s, c);
+ break;
+
+ case 0: /* Fully buffered. */
+ rv += verify_fully_buffered (fp, f, s, c);
+ break;
+
+ default:
+ abort ();
+ }
+
+
+ fclose (fp);
+ return rv;
+}
+
+/*------------------------------------------------------------*/
+
+#ifdef INDEPENDENT_PART
+/* This part is the independent sub-process we call to test stdin et
+ al. */
+
+int
+main (int argc, char **argv)
+{
+ /* This is one of the subprocesses we created to test stdin et
+ al. */
+ FILE *fp;
+
+ /* If we're called as a regular test, instead of as a sub-process,
+ don't complain. */
+ if (argc == 1)
+ return 0;
+
+ if (argc != 4)
+ {
+ int i;
+ for (i=0; i<=argc; i++)
+ printf ("argv[%d] = `%s'\n", i, argv[i] ?: "(null)");
+ FAIL_EXIT1 ("sub-process called wrong");
+ }
+
+ prepare_test_data ();
+
+ enum test_source_case f = atoi (argv[1]);
+ enum test_stream_case s = atoi (argv[2]);
+ enum test_config_case c = atoi (argv[3]);
+
+ if (s != test_stream_stdout)
+ printf ("\n\033[41mRunning test %s : %s : %s\033[0m\n",
+ test_source_name[f],
+ test_stream_name[s],
+ test_config_name[c]);
+
+ switch (s)
+ {
+ case test_stream_stdin:
+ fp = stdin;
+ break;
+ case test_stream_stdout:
+ fp = stdout;
+ break;
+ case test_stream_stderr:
+ fp = stderr;
+ break;
+ default:
+ abort ();
+ }
+
+ return do_second_part (fp, f, s, c);
+}
+
+#else
+/* This part is the standard test process. */
+
+/* Spawn an independent sub-process with std* redirected. */
+int
+recurse (FILE *fp,
+ enum test_source_case f,
+ enum test_stream_case s,
+ enum test_config_case c)
+{
+ /* We need to test stdin, stdout, or stderr, which means creating a
+ subprocess with one of those redirected from FP. */
+ debug;
+
+ pid_t pid;
+ int status;
+
+ pid = fork ();
+
+ switch (pid)
+ {
+ case -1: /* error */
+ perror ("fork");
+ return 1;
+ break;
+
+ default: /* parent */
+ fclose (fp);
+ xwaitpid (pid, &status, 0);
+ if (WIFEXITED (status)
+ && WEXITSTATUS (status) == 0)
+ return 0;
+ return 1;
+
+ case 0: /* child */
+ switch (s)
+ {
+ case test_stream_stdin:
+ xclose (0);
+ dup2 (fileno (fp), 0);
+ break;
+ case test_stream_stdout:
+ xclose (1);
+ dup2 (fileno (fp), 1);
+ break;
+ case test_stream_stderr:
+ xclose (2);
+ dup2 (fileno (fp), 2);
+ break;
+ default:
+ abort ();
+ }
+ fclose (fp);
+
+ /* At this point, we have to run a program... which is tricky to
+ properly support for remote targets or crosses, because of
+ glibc versions etc. Hence we run in a test-container. */
+
+ char fs[10], ss[10], cs[10];
+ sprintf (fs, "%d", f);
+ sprintf (ss, "%d", s);
+ sprintf (cs, "%d", c);
+ execl (IND_PROC, IND_PROC, fs, ss, cs, NULL);
+ if (s == test_stream_stdout)
+ fprintf (stderr, "execl (%s) failed, ", IND_PROC);
+ else
+ printf ("execl (%s) failed, ", IND_PROC);
+ perror ("The error was");
+ exit (1);
+ break;
+ }
+
+ return 0;
+}
+
+int
+do_test (void)
+{
+ int rv = 0;
+
+ signal (SIGPIPE, SIG_IGN);
+
+ prepare_test_data ();
+
+ for (enum test_source_case f = 0; f < test_source_count; ++ f)
+ for (enum test_stream_case s = 0; s < test_stream_count; ++ s)
+ for (enum test_config_case c = 0; c < test_config_count; ++ c)
+ {
+ printf ("\n\033[43mRunning test %s : %s : %s\033[0m\n",
+ test_source_name[f],
+ test_stream_name[s],
+ test_config_name[c]);
+
+ FILE *fp = open_test_stream (f, s);
+
+ if (fp)
+ {
+
+ if (s <= test_stream_stderr)
+ {
+ rv += recurse (fp, f, s, c);
+ }
+ else
+ {
+ rv += do_second_part (fp, f, s, c);
+ }
+
+ unprepare_test_file (fp, f, s);
+ }
+ }
+
+ free (buffer);
+
+ printf ("return %d\n", rv);
+ return rv;
+}
+
+#include <support/test-driver.c>
+#endif
+