diff options
Diffstat (limited to 'src/mountinfo.c')
| -rw-r--r-- | src/mountinfo.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/src/mountinfo.c b/src/mountinfo.c new file mode 100644 index 00000000..1fc84420 --- /dev/null +++ b/src/mountinfo.c @@ -0,0 +1,246 @@ +/* + mountinfo.c + Obtains information about mounted filesystems. + + Copyright 2007 Gentoo Foundation + */ + +#include <sys/types.h> +#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) +#include <sys/param.h> +#include <sys/ucred.h> +#include <sys/mount.h> +#elif defined(__linux__) +#include <limits.h> +#endif + +#include <errno.h> +#include <limits.h> +#include <regex.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "einfo.h" +#include "rc.h" +#include "rc-misc.h" +#include "strlist.h" + +#if defined(__FreeBSD__) || defined(__NetBSD__) || defined (__OpenBSD__) +static char **find_mounts (regex_t *node_regex, regex_t *fstype_regex, + char **mounts, bool list_nodes, bool list_fstype) +{ + struct statfs *mnts; + int nmnts; + int i; + char **list = NULL; + + if ((nmnts = getmntinfo (&mnts, MNT_NOWAIT)) == 0) + eerrorx ("getmntinfo: %s", strerror (errno)); + + for (i = 0; i < nmnts; i++) + { + if (node_regex && + regexec (node_regex, mnts[i].f_mntfromname, 0, NULL, 0) != 0) + continue; + if (fstype_regex && + regexec (fstype_regex, mnts[i].f_fstypename, 0, NULL, 0) != 0) + continue; + + if (mounts) + { + bool found = false; + int j; + char *mnt; + STRLIST_FOREACH (mounts, mnt, j) + if (strcmp (mnt, mnts[i].f_mntonname) == 0) + { + found = true; + break; + } + if (! found) + continue; + } + + list = rc_strlist_addsortc (list, list_nodes ? + mnts[i].f_mntfromname : + list_fstype ? mnts[i].f_fstypename : + mnts[i].f_mntonname); + } + + return (list); +} + +#elif defined (__linux__) +static char **find_mounts (regex_t *node_regex, regex_t *fstype_regex, + char **mounts, bool list_nodes, bool list_fstype) +{ + FILE *fp; + char buffer[PATH_MAX * 3]; + char *p; + char *from; + char *to; + char *fstype; + char **list = NULL; + + if ((fp = fopen ("/proc/mounts", "r")) == NULL) + eerrorx ("getmntinfo: %s", strerror (errno)); + + while (fgets (buffer, sizeof (buffer), fp)) + { + p = buffer; + from = strsep (&p, " "); + if (node_regex && + regexec (node_regex, from, 0, NULL, 0) != 0) + continue; + + to = strsep (&p, " "); + fstype = strsep (&p, " "); + /* Skip the really silly rootfs */ + if (strcmp (fstype, "rootfs") == 0) + continue; + if (fstype_regex && + regexec (fstype_regex, fstype, 0, NULL, 0) != 0) + continue; + + if (mounts) + { + bool found = false; + int j; + char *mnt; + STRLIST_FOREACH (mounts, mnt, j) + if (strcmp (mnt, to) == 0) + { + found = true; + break; + } + if (! found) + continue; + } + + list = rc_strlist_addsortc (list, + list_nodes ? + list_fstype ? fstype : + from : to); + } + fclose (fp); + + return (list); +} + +#else +# error "Operating system not supported!" +#endif + +int main (int argc, char **argv) +{ + int i; + regex_t *fstype_regex = NULL; + regex_t *node_regex = NULL; + regex_t *skip_regex = NULL; + char **nodes = NULL; + char *node; + int result; + char buffer[256]; + bool list_nodes = false; + bool list_fstype = false; + bool reverse = false; + char **mounts = NULL; + + for (i = 1; i < argc; i++) + { + if (strcmp (argv[i], "--fstype-regex") == 0 && (i + 1 < argc)) + { + i++; + if (fstype_regex) + free (fstype_regex); + fstype_regex = rc_xmalloc (sizeof (regex_t)); + if ((result = regcomp (fstype_regex, argv[i], + REG_EXTENDED | REG_NOSUB)) != 0) + { + regerror (result, fstype_regex, buffer, sizeof (buffer)); + eerrorx ("%s: invalid regex `%s'", argv[0], buffer); + } + continue; + } + + if (strcmp (argv[i], "--node-regex") == 0 && (i + 1 < argc)) + { + i++; + if (node_regex) + free (node_regex); + node_regex = rc_xmalloc (sizeof (regex_t)); + if ((result = regcomp (node_regex, argv[i], + REG_EXTENDED | REG_NOSUB)) != 0) + { + regerror (result, node_regex, buffer, sizeof (buffer)); + eerrorx ("%s: invalid regex `%s'", argv[0], buffer); + } + continue; + } + + if (strcmp (argv[i], "--skip-regex") == 0 && (i + 1 < argc)) + { + i++; + if (skip_regex) + free (skip_regex); + skip_regex = rc_xmalloc (sizeof (regex_t)); + if ((result = regcomp (skip_regex, argv[i], + REG_EXTENDED | REG_NOSUB)) != 0) + { + regerror (result, skip_regex, buffer, sizeof (buffer)); + eerrorx ("%s: invalid regex `%s'", argv[0], buffer); + } + continue; + } + + if (strcmp (argv[i], "--fstype") == 0) + { + list_fstype = true; + continue; + } + + if (strcmp (argv[i], "--node") == 0) + { + list_nodes = true; + continue; + } + if (strcmp (argv[i], "--reverse") == 0) + { + reverse = true; + continue; + } + + if (argv[i][0] != '/') + eerrorx ("%s: `%s' is not a mount point", argv[0], argv[i]); + + mounts = rc_strlist_add (mounts, argv[i]); + } + + nodes = find_mounts (node_regex, fstype_regex, mounts, + list_nodes, list_fstype); + + if (node_regex) + regfree (node_regex); + if (fstype_regex) + regfree (fstype_regex); + + if (reverse) + rc_strlist_reverse (nodes); + + result = EXIT_FAILURE; + STRLIST_FOREACH (nodes, node, i) + { + if (skip_regex && regexec (skip_regex, node, 0, NULL, 0) == 0) + continue; + printf ("%s\n", node); + result = EXIT_SUCCESS; + } + rc_strlist_free (nodes); + + if (skip_regex) + free (skip_regex); + + exit (result); +} + |