diff options
Diffstat (limited to 'package/aufs2-util/src/mount.aufs.c')
| -rw-r--r-- | package/aufs2-util/src/mount.aufs.c | 255 |
1 files changed, 0 insertions, 255 deletions
diff --git a/package/aufs2-util/src/mount.aufs.c b/package/aufs2-util/src/mount.aufs.c deleted file mode 100644 index d801cfd3c..000000000 --- a/package/aufs2-util/src/mount.aufs.c +++ /dev/null @@ -1,255 +0,0 @@ -/* - * Copyright (C) 2005-2009 Junjiro Okajima - * - * This program, aufs is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/* - * The main purpose of this script is updating /etc/mtab and calling auplilnk. - * This behaviour is highly depending on mount(8) in util-linux package. - */ - -#define _XOPEN_SOURCE 500 /* getsubopt */ -#define _BSD_SOURCE /* dirfd */ - -#include <sys/types.h> -#include <dirent.h> -#include <mntent.h> -#include <regex.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <wait.h> - -#include <linux/aufs_type.h> -#include "au_util.h" - -enum { Remount, Bind, Fake, Update, Verbose, AuFlush, LastOpt }; -static void test_opts(char opts[], unsigned char flags[]) -{ - int c; - char *p, *o, *val, *pat[] = { - [Remount] = "remount", - [Bind] = "bind", - NULL - }; - - o = strdup(opts); - if (!o) - AuFin("stdup"); - - p = o; - while (*p) { - c = getsubopt(&p, pat, &val); - switch (c) { - case Remount: - flags[Remount] = 1; - break; - case Bind: - flags[Bind] = 1; - break; - } - } - free(o); -} - -static int test_flush(char opts[]) -{ - int err, i; - regex_t preg; - char *p, *o; - const char *pat = "^((add|ins|append|prepend|del)[:=]" - "|(mod|imod)[:=][^,]*=ro" - "|(noplink|ro)$)"; - - - o = strdup(opts); - if (!o) - AuFin("stdup"); - - p = o; - i = 1; - while ((p = strchr(p, ','))) { - i++; - *p++ = 0; - } - - /* todo: try getsubopt(3)? */ - err = regcomp(&preg, pat, REG_EXTENDED | REG_NOSUB); - if (err) - AuFin("regcomp"); - - p = o; - while (i--) { - if (!regexec(&preg, p, 0, NULL, 0)) { - err = 1; - break; - } else - p += strlen(p) + 1; - } - regfree(&preg); - free(o); - - return err; -} - -static void do_mount(char *dev, char *mntpnt, int argc, char *argv[], - unsigned char flags[]) -{ - int i; - const int ac = argc + 6; - char *av[ac], **a; - - /* todo: eliminate the duplicated options */ - a = av; - *a++ = "mount"; - *a++ = "-i"; - if (flags[Fake]) - *a++ = "-f"; - if (!flags[Bind] || !flags[Update]) - *a++ = "-n"; - if (flags[Bind] && flags[Verbose]) - *a++ = "-v"; - *a++ = "-t"; - *a++ = AUFS_NAME; - - for (i = 3; i < argc; i++) - if (strcmp(argv[i], "-v") && strcmp(argv[i], "-n")) - *a++ = argv[i]; - *a++ = dev; - *a++ = mntpnt; - *a++ = NULL; - -#ifdef DEBUG - for (i = 0; av[i] && i < ac; i++) - puts(av[i]); - exit(0); -#endif - execvp("mount", av); - AuFin("mount"); -} - -/* ---------------------------------------------------------------------- */ - -int main(int argc, char *argv[]) -{ - int err, c, status; - pid_t pid; - unsigned char flags[LastOpt]; - struct mntent ent; - char *dev, *mntpnt, *opts, *cwd; - DIR *cur; - - if (argc < 3) { - errno = EINVAL; - AuFin(NULL); - } - - memset(flags, 0, sizeof(flags)); - flags[Update] = 1; - opts = NULL; - - /* mount(8) always passes the arguments in this order */ - dev = argv[1]; - mntpnt = argv[2]; - while ((c = getopt(argc - 2, argv + 2, "fnvo:")) != -1) { - switch (c) { - case 'f': - flags[Fake] = 1; - break; - case 'n': - flags[Update] = 0; - break; - case 'v': - flags[Verbose] = 1; - break; - case 'o': - opts = optarg; - break; - case '?': - case ':': - errno = EINVAL; - AuFin("internal error"); - } - } - - cur = opendir("."); - if (!cur) - AuFin("."); - err = chdir(mntpnt); - if (err) - AuFin("%s", mntpnt); - cwd = getcwd(NULL, 0); /* glibc */ - if (!cwd) - AuFin("getcwd"); - err = fchdir(dirfd(cur)); - if (err) - AuFin("fchdir"); - closedir(cur); /* ignore */ - - if (opts) - test_opts(opts, flags); - - if (!flags[Bind] && flags[Update]) { - err = access(MTab, R_OK | W_OK); - if (err) - AuFin(MTab); - } - - if (flags[Remount]) { - errno = EINVAL; - if (flags[Bind]) - AuFin("both of remount and bind are specified"); - flags[AuFlush] = test_flush(opts); - if (flags[AuFlush] /* && !flags[Fake] */) { - err = au_plink(cwd, AuPlink_FLUSH, 1, 1); - if (err) - AuFin(NULL); - } - } - - pid = fork(); - if (!pid) { - /* actual mount operation */ - do_mount(dev, mntpnt, argc, argv, flags); - return 0; - } else if (pid < 0) - AuFin("fork"); - - err = waitpid(pid, &status, 0); - if (err < 0) - AuFin("child process"); - - err = !WIFEXITED(status); - if (!err) - err = WEXITSTATUS(status); - - if (!err && !flags[Bind]) { - if (flags[Update]) - err = au_update_mtab(cwd, flags[Remount], - flags[Verbose]); - else if (flags[Verbose]) { - /* withoug blocking plink */ - err = au_proc_getmntent(cwd, &ent); - if (!err) - au_print_ent(&ent); - else - AuFin("internal error"); - } - } - - return err; -} |