| Message ID | 1516970413-31555-1-git-send-email-stefan@herbrechtsmeier.net |
|---|---|
| State | Accepted |
| Headers | show |
| Series | Lua: Add function to mount and unmount devices | expand |
On 26/01/2018 13:40, stefan@herbrechtsmeier.net wrote: > From: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com> > > Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com> > --- > > corelib/lua_interface.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 70 insertions(+) > > diff --git a/corelib/lua_interface.c b/corelib/lua_interface.c > index 64e5a5f..b8492ae 100644 > --- a/corelib/lua_interface.c > +++ b/corelib/lua_interface.c > @@ -10,6 +10,8 @@ > #include <unistd.h> > #include <stdbool.h> > #include <errno.h> > +#include <sys/mount.h> > + > #include "lua.h" > #include "lauxlib.h" > #include "lualib.h" > @@ -649,6 +651,72 @@ static int l_info(lua_State *L) { > return 0; > } > > +static int l_mount(lua_State *L) { > + const char *device = luaL_checkstring(L, 1); > + const char *filesystem = luaL_checkstring(L, 2); > + char *target; > + > + if (!device || !strlen(device) || !filesystem || !strlen(filesystem)) > + goto l_mount_exit; > + > + if (asprintf(&target, "%s%sXXXXXX", get_tmpdir(), DATADST_DIR_SUFFIX) == -1) { > + TRACE("Unable to allocate memory\n"); > + goto l_mount_exit; > + } > + > + if (!mkdtemp(target)) { > + TRACE("Unable to create a unique temporary directory %s: %s\n", > + target, strerror(errno)); > + goto l_mount_free_exit; > + } > + > + if (mount(device, target, filesystem, 0, NULL) == -1) { > + TRACE("Device %s with filesystem %s cannot be mounted: %s", > + device, filesystem, strerror(errno)); > + goto l_mount_rmdir_exit; > + } > + > + lua_pop(L, 2); > + lua_pushstring(L, target); > + > + free(target); > + > + return 1; > + > +l_mount_rmdir_exit: > + rmdir(target); > +l_mount_free_exit: > + free(target); > +l_mount_exit: > + lua_pop(L, 2); > + lua_pushnil(L); > + return 1; > +} > + > +static int l_umount(lua_State *L) { > + const char *target = luaL_checkstring(L, 1); > + > + if (umount(target) == -1) { > + TRACE("Unable to unmount %s: %s\n", target, strerror(errno)); > + goto l_umount_exit; > + } > + > + if (rmdir(target) == -1) { > + TRACE("Unable to remove directory %s: %s\n", target, strerror(errno)); > + goto l_umount_exit; > + } > + > + lua_pop(L, 1); > + lua_pushboolean(L, true); > + > + return 1; > + > +l_umount_exit: > + lua_pop(L, 1); > + lua_pushnil(L); > + return 1; > +} > + > static int l_get_bootenv(lua_State *L) { > const char *name = luaL_checkstring(L, 1); > char *value = NULL; > @@ -695,6 +763,8 @@ static const luaL_Reg l_swupdate[] = { > { "error", l_error }, > { "trace", l_trace }, > { "info", l_info }, > + { "mount", l_mount }, > + { "umount", l_umount }, > { NULL, NULL } > }; > > Applied to -master, thanks ! Best regards, Stefano Babic
diff --git a/corelib/lua_interface.c b/corelib/lua_interface.c index 64e5a5f..b8492ae 100644 --- a/corelib/lua_interface.c +++ b/corelib/lua_interface.c @@ -10,6 +10,8 @@ #include <unistd.h> #include <stdbool.h> #include <errno.h> +#include <sys/mount.h> + #include "lua.h" #include "lauxlib.h" #include "lualib.h" @@ -649,6 +651,72 @@ static int l_info(lua_State *L) { return 0; } +static int l_mount(lua_State *L) { + const char *device = luaL_checkstring(L, 1); + const char *filesystem = luaL_checkstring(L, 2); + char *target; + + if (!device || !strlen(device) || !filesystem || !strlen(filesystem)) + goto l_mount_exit; + + if (asprintf(&target, "%s%sXXXXXX", get_tmpdir(), DATADST_DIR_SUFFIX) == -1) { + TRACE("Unable to allocate memory\n"); + goto l_mount_exit; + } + + if (!mkdtemp(target)) { + TRACE("Unable to create a unique temporary directory %s: %s\n", + target, strerror(errno)); + goto l_mount_free_exit; + } + + if (mount(device, target, filesystem, 0, NULL) == -1) { + TRACE("Device %s with filesystem %s cannot be mounted: %s", + device, filesystem, strerror(errno)); + goto l_mount_rmdir_exit; + } + + lua_pop(L, 2); + lua_pushstring(L, target); + + free(target); + + return 1; + +l_mount_rmdir_exit: + rmdir(target); +l_mount_free_exit: + free(target); +l_mount_exit: + lua_pop(L, 2); + lua_pushnil(L); + return 1; +} + +static int l_umount(lua_State *L) { + const char *target = luaL_checkstring(L, 1); + + if (umount(target) == -1) { + TRACE("Unable to unmount %s: %s\n", target, strerror(errno)); + goto l_umount_exit; + } + + if (rmdir(target) == -1) { + TRACE("Unable to remove directory %s: %s\n", target, strerror(errno)); + goto l_umount_exit; + } + + lua_pop(L, 1); + lua_pushboolean(L, true); + + return 1; + +l_umount_exit: + lua_pop(L, 1); + lua_pushnil(L); + return 1; +} + static int l_get_bootenv(lua_State *L) { const char *name = luaL_checkstring(L, 1); char *value = NULL; @@ -695,6 +763,8 @@ static const luaL_Reg l_swupdate[] = { { "error", l_error }, { "trace", l_trace }, { "info", l_info }, + { "mount", l_mount }, + { "umount", l_umount }, { NULL, NULL } };