diff options
Diffstat (limited to 'src/rofiles-fuse/main.c')
| -rw-r--r-- | src/rofiles-fuse/main.c | 171 |
1 files changed, 83 insertions, 88 deletions
diff --git a/src/rofiles-fuse/main.c b/src/rofiles-fuse/main.c index 7f49dd88..937ee4a6 100644 --- a/src/rofiles-fuse/main.c +++ b/src/rofiles-fuse/main.c @@ -23,19 +23,19 @@ #error config.h needs to define FUSE_USE_VERSION #endif -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/statvfs.h> -#include <stdio.h> +#include <dirent.h> #include <err.h> -#include <stdlib.h> -#include <string.h> #include <errno.h> #include <fcntl.h> +#include <fuse.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/stat.h> +#include <sys/statvfs.h> +#include <sys/types.h> #include <sys/xattr.h> -#include <dirent.h> #include <unistd.h> -#include <fuse.h> #include <glib.h> @@ -98,11 +98,11 @@ callback_readlink (const char *path, char *buf, size_t size) static int #if FUSE_USE_VERSION >= 31 -callback_readdir (const char *path, void *buf, fuse_fill_dir_t filler, - off_t offset, struct fuse_file_info *fi, enum fuse_readdir_flags flags) +callback_readdir (const char *path, void *buf, fuse_fill_dir_t filler, off_t offset, + struct fuse_file_info *fi, enum fuse_readdir_flags flags) #else -callback_readdir (const char *path, void *buf, fuse_fill_dir_t filler, - off_t offset, struct fuse_file_info *fi) +callback_readdir (const char *path, void *buf, fuse_fill_dir_t filler, off_t offset, + struct fuse_file_info *fi) #endif { DIR *dp; @@ -146,7 +146,7 @@ callback_readdir (const char *path, void *buf, fuse_fill_dir_t filler, #endif } - (void) closedir (dp); + (void)closedir (dp); return 0; } @@ -195,8 +195,7 @@ callback_symlink (const char *from, const char *to) if (fstatat (basefd, to, &stbuf, AT_SYMLINK_NOFOLLOW) == -1) { - fprintf (stderr, "Failed to find newly created symlink '%s': %s\n", - to, g_strerror (errno)); + fprintf (stderr, "Failed to find newly created symlink '%s': %s\n", to, g_strerror (errno)); exit (EXIT_FAILURE); } return 0; @@ -277,8 +276,7 @@ gioerror_to_errno (GIOErrorEnum e) } static int -verify_write_or_copyup (const char *path, const struct stat *stbuf, - gboolean *out_did_copyup) +verify_write_or_copyup (const char *path, const struct stat *stbuf, gboolean *out_did_copyup) { struct stat stbuf_local; @@ -303,7 +301,7 @@ verify_write_or_copyup (const char *path, const struct stat *stbuf, { if (opt_copyup) { - g_autoptr(GError) tmp_error = NULL; + g_autoptr (GError) tmp_error = NULL; if (!ostree_break_hardlink (basefd, path, FALSE, NULL, &tmp_error)) return -gioerror_to_errno ((GIOErrorEnum)tmp_error->code); if (out_did_copyup) @@ -320,12 +318,15 @@ verify_write_or_copyup (const char *path, const struct stat *stbuf, * to a relative path (even for the caller) and * perform either write verification or copy-up. */ -#define PATH_WRITE_ENTRYPOINT(path) do { \ - path = ENSURE_RELPATH (path); \ - int r = verify_write_or_copyup (path, NULL, NULL); \ - if (r != 0) \ - return r; \ - } while (0) +#define PATH_WRITE_ENTRYPOINT(path) \ + do \ + { \ + path = ENSURE_RELPATH (path); \ + int r = verify_write_or_copyup (path, NULL, NULL); \ + if (r != 0) \ + return r; \ + } \ + while (0) static int #if FUSE_USE_VERSION >= 31 @@ -368,7 +369,7 @@ callback_truncate (const char *path, off_t size) { PATH_WRITE_ENTRYPOINT (path); - glnx_autofd int fd = openat (basefd, path, O_NOFOLLOW|O_WRONLY); + glnx_autofd int fd = openat (basefd, path, O_NOFOLLOW | O_WRONLY); if (fd == -1) return -errno; @@ -422,7 +423,7 @@ do_open (const char *path, mode_t mode, struct fuse_file_info *finfo) if (fstat (fd, &stbuf) == -1) { - (void) close (fd); + (void)close (fd); return -errno; } @@ -430,20 +431,20 @@ do_open (const char *path, mode_t mode, struct fuse_file_info *finfo) int r = verify_write_or_copyup (path, &stbuf, &did_copyup); if (r != 0) { - (void) close (fd); + (void)close (fd); return r; } /* In the copyup case, we need to re-open */ if (did_copyup) { - (void) close (fd); + (void)close (fd); /* Note that unlike the initial open, we will pass through * O_TRUNC. More ideally in this copyup case we'd avoid copying * the whole file in the first place, but eh. It's not like we're * high performance anyways. */ - fd = openat (basefd, path, finfo->flags & ~(O_EXCL|O_CREAT), mode); + fd = openat (basefd, path, finfo->flags & ~(O_EXCL | O_CREAT), mode); if (fd == -1) return -errno; } @@ -456,7 +457,7 @@ do_open (const char *path, mode_t mode, struct fuse_file_info *finfo) { if (ftruncate (fd, 0) == -1) { - (void) close (fd); + (void)close (fd); return -errno; } } @@ -475,14 +476,14 @@ callback_open (const char *path, struct fuse_file_info *finfo) } static int -callback_create(const char *path, mode_t mode, struct fuse_file_info *finfo) +callback_create (const char *path, mode_t mode, struct fuse_file_info *finfo) { return do_open (path, mode, finfo); } static int -callback_read_buf (const char *path, struct fuse_bufvec **bufp, - size_t size, off_t offset, struct fuse_file_info *finfo) +callback_read_buf (const char *path, struct fuse_bufvec **bufp, size_t size, off_t offset, + struct fuse_file_info *finfo) { struct fuse_bufvec *src; @@ -501,8 +502,7 @@ callback_read_buf (const char *path, struct fuse_bufvec **bufp, } static int -callback_read (const char *path, char *buf, size_t size, off_t offset, - struct fuse_file_info *finfo) +callback_read (const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *finfo) { int r; r = pread (finfo->fh, buf, size, offset); @@ -546,7 +546,7 @@ callback_statfs (const char *path, struct statvfs *st_buf) static int callback_release (const char *path, struct fuse_file_info *finfo) { - (void) close (finfo->fh); + (void)close (finfo->fh); return 0; } @@ -573,8 +573,7 @@ callback_access (const char *path, int mode) } static int -callback_setxattr (const char *path, const char *name, const char *value, - size_t size, int flags) +callback_setxattr (const char *path, const char *name, const char *value, size_t size, int flags) { PATH_WRITE_ENTRYPOINT (path); @@ -587,8 +586,7 @@ callback_setxattr (const char *path, const char *name, const char *value, } static int -callback_getxattr (const char *path, const char *name, char *value, - size_t size) +callback_getxattr (const char *path, const char *name, char *value, size_t size) { path = ENSURE_RELPATH (path); @@ -634,40 +632,39 @@ callback_removexattr (const char *path, const char *name) return 0; } -struct fuse_operations callback_oper = { - .getattr = callback_getattr, - .readlink = callback_readlink, - .readdir = callback_readdir, - .mknod = callback_mknod, - .mkdir = callback_mkdir, - .symlink = callback_symlink, - .unlink = callback_unlink, - .rmdir = callback_rmdir, - .rename = callback_rename, - .link = callback_link, - .chmod = callback_chmod, - .chown = callback_chown, - .truncate = callback_truncate, - .utimens = callback_utimens, - .create = callback_create, - .open = callback_open, - .read_buf = callback_read_buf, - .read = callback_read, - .write_buf = callback_write_buf, - .write = callback_write, - .statfs = callback_statfs, - .release = callback_release, - .fsync = callback_fsync, - .access = callback_access, - - /* Extended attributes support for userland interaction */ - .setxattr = callback_setxattr, - .getxattr = callback_getxattr, - .listxattr = callback_listxattr, - .removexattr = callback_removexattr -}; - -enum { +struct fuse_operations callback_oper = { .getattr = callback_getattr, + .readlink = callback_readlink, + .readdir = callback_readdir, + .mknod = callback_mknod, + .mkdir = callback_mkdir, + .symlink = callback_symlink, + .unlink = callback_unlink, + .rmdir = callback_rmdir, + .rename = callback_rename, + .link = callback_link, + .chmod = callback_chmod, + .chown = callback_chown, + .truncate = callback_truncate, + .utimens = callback_utimens, + .create = callback_create, + .open = callback_open, + .read_buf = callback_read_buf, + .read = callback_read, + .write_buf = callback_write_buf, + .write = callback_write, + .statfs = callback_statfs, + .release = callback_release, + .fsync = callback_fsync, + .access = callback_access, + + /* Extended attributes support for userland interaction */ + .setxattr = callback_setxattr, + .getxattr = callback_getxattr, + .listxattr = callback_listxattr, + .removexattr = callback_removexattr }; + +enum +{ KEY_HELP, KEY_VERSION, KEY_COPYUP, @@ -679,26 +676,28 @@ usage (const char *progname) fprintf (stdout, "usage: %s basepath mountpoint [options]\n" "\n" - " Makes basepath visible at mountpoint such that files are read-only, directories are writable\n" + " Makes basepath visible at mountpoint such that files are read-only, directories " + "are writable\n" "\n" "general options:\n" " -o opt,[opt...] mount options\n" " -h --help print help\n" - "\n", progname); + "\n", + progname); } static int -rofs_parse_opt (void *data, const char *arg, int key, - struct fuse_args *outargs) +rofs_parse_opt (void *data, const char *arg, int key, struct fuse_args *outargs) { - (void) data; + (void)data; switch (key) { case FUSE_OPT_KEY_NONOPT: if (basefd == -1) { - basefd = openat (AT_FDCWD, arg, O_RDONLY | O_NONBLOCK | O_DIRECTORY | O_CLOEXEC | O_NOCTTY); + basefd + = openat (AT_FDCWD, arg, O_RDONLY | O_NONBLOCK | O_DIRECTORY | O_CLOEXEC | O_NOCTTY); if (basefd == -1) err (1, "opening rootfs %s", arg); return 0; @@ -722,14 +721,10 @@ rofs_parse_opt (void *data, const char *arg, int key, return 1; } -static struct fuse_opt rofs_opts[] = { - FUSE_OPT_KEY ("-h", KEY_HELP), - FUSE_OPT_KEY ("--help", KEY_HELP), - FUSE_OPT_KEY ("-V", KEY_VERSION), - FUSE_OPT_KEY ("--version", KEY_VERSION), - FUSE_OPT_KEY ("--copyup", KEY_COPYUP), - FUSE_OPT_END -}; +static struct fuse_opt rofs_opts[] + = { FUSE_OPT_KEY ("-h", KEY_HELP), FUSE_OPT_KEY ("--help", KEY_HELP), + FUSE_OPT_KEY ("-V", KEY_VERSION), FUSE_OPT_KEY ("--version", KEY_VERSION), + FUSE_OPT_KEY ("--copyup", KEY_COPYUP), FUSE_OPT_END }; int main (int argc, char *argv[]) |