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/* |
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mountinfo.c |
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Obtains information about mounted filesystems. |
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|
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Copyright 2007 Gentoo Foundation |
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*/ |
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|
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#define APPLET "mountinfo" |
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|
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#include <sys/types.h> |
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#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) |
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#include <sys/param.h> |
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#include <sys/ucred.h> |
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#include <sys/mount.h> |
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#elif defined(__linux__) |
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#include <limits.h> |
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#endif |
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|
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#include <errno.h> |
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#include <getopt.h> |
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#include <limits.h> |
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#include <regex.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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|
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#include "einfo.h" |
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#include "rc.h" |
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#include "rc-misc.h" |
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#include "strlist.h" |
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|
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|
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#if defined(__FreeBSD__) || defined(__NetBSD__) || defined (__OpenBSD__) |
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static char **find_mounts (regex_t *node_regex, regex_t *skip_node_regex, |
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regex_t *fstype_regex, regex_t *skip_fstype_regex, |
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char **mounts, bool list_nodes, bool list_fstype) |
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{ |
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struct statfs *mnts; |
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int nmnts; |
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int i; |
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char **list = NULL; |
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|
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if ((nmnts = getmntinfo (&mnts, MNT_NOWAIT)) == 0) |
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eerrorx ("getmntinfo: %s", strerror (errno)); |
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|
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for (i = 0; i < nmnts; i++) { |
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if (node_regex && |
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regexec (node_regex, mnts[i].f_mntfromname, 0, NULL, 0) != 0) |
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continue; |
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if (skip_node_regex && |
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regexec (skip_node_regex, mnts[i].f_mntfromname, 0, NULL, 0) == 0) |
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continue; |
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if (fstype_regex && |
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regexec (fstype_regex, mnts[i].f_fstypename, 0, NULL, 0) != 0) |
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continue; |
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if (skip_fstype_regex && |
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regexec (skip_fstype_regex, mnts[i].f_fstypename, 0, NULL, 0) == 0) |
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continue; |
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|
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if (mounts) { |
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bool found = false; |
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int j; |
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char *mnt; |
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STRLIST_FOREACH (mounts, mnt, j) |
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if (strcmp (mnt, mnts[i].f_mntonname) == 0) { |
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found = true; |
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break; |
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} |
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if (! found) |
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continue; |
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} |
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|
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list = rc_strlist_addsortc (list, list_nodes ? |
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mnts[i].f_mntfromname : |
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list_fstype ? mnts[i].f_fstypename : |
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mnts[i].f_mntonname); |
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} |
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|
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return (list); |
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} |
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|
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#elif defined (__linux__) |
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static char **find_mounts (regex_t *node_regex, regex_t *skip_node_regex, |
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regex_t *fstype_regex, regex_t *skip_fstype_regex, |
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char **mounts, bool list_nodes, bool list_fstype) |
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{ |
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FILE *fp; |
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char buffer[PATH_MAX * 3]; |
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char *p; |
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char *from; |
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char *to; |
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char *fstype; |
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char **list = NULL; |
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|
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if ((fp = fopen ("/proc/mounts", "r")) == NULL) |
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eerrorx ("getmntinfo: %s", strerror (errno)); |
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|
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while (fgets (buffer, sizeof (buffer), fp)) { |
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p = buffer; |
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from = strsep (&p, " "); |
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if (node_regex && |
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regexec (node_regex, from, 0, NULL, 0) != 0) |
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continue; |
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if (skip_node_regex && |
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regexec (skip_node_regex, from, 0, NULL, 0) == 0) |
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continue; |
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|
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to = strsep (&p, " "); |
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fstype = strsep (&p, " "); |
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/* Skip the really silly rootfs */ |
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if (strcmp (fstype, "rootfs") == 0) |
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continue; |
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if (fstype_regex && |
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regexec (fstype_regex, fstype, 0, NULL, 0) != 0) |
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continue; |
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if (skip_fstype_regex && |
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regexec (skip_fstype_regex, fstype, 0, NULL, 0) == 0) |
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continue; |
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|
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if (mounts) { |
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bool found = false; |
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int j; |
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char *mnt; |
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STRLIST_FOREACH (mounts, mnt, j) |
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if (strcmp (mnt, to) == 0) { |
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found = true; |
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break; |
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} |
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if (! found) |
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continue; |
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} |
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|
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list = rc_strlist_addsortc (list, |
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list_nodes ? |
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list_fstype ? fstype : |
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from : to); |
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} |
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fclose (fp); |
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|
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return (list); |
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} |
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|
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#else |
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# error "Operating system not supported!" |
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#endif |
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|
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static regex_t *get_regex (char *string) |
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{ |
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regex_t *reg = rc_xmalloc (sizeof (regex_t)); |
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int result; |
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char buffer[256]; |
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|
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if ((result = regcomp (reg, string, REG_EXTENDED | REG_NOSUB)) != 0) |
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{ |
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regerror (result, reg, buffer, sizeof (buffer)); |
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eerrorx ("%s: invalid regex `%s'", APPLET, buffer); |
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} |
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|
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return (reg); |
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} |
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|
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#include "_usage.h" |
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#define getoptstring "f:F:n:N:p:P:os" getoptstring_COMMON |
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static struct option longopts[] = { |
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{ "fstype-regex", 1, NULL, 'f'}, |
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{ "skip-fstype-regex", 1, NULL, 'F'}, |
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{ "node-regex", 1, NULL, 'n'}, |
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{ "skip-node-regex", 1, NULL, 'N'}, |
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{ "point-regex", 1, NULL, 'p'}, |
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{ "skip-point-regex", 1, NULL, 'P'}, |
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{ "list-nodes", 0, NULL, 'o'}, |
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{ "list-fstype", 0, NULL, 's'}, |
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longopts_COMMON |
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{ NULL, 0, NULL, 0} |
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}; |
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#include "_usage.c" |
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|
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int main (int argc, char **argv) |
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{ |
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int i; |
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regex_t *fstype_regex = NULL; |
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regex_t *node_regex = NULL; |
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regex_t *point_regex = NULL; |
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regex_t *skip_fstype_regex = NULL; |
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regex_t *skip_node_regex = NULL; |
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regex_t *skip_point_regex = NULL; |
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char **nodes = NULL; |
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char *node; |
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bool list_nodes = false; |
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bool list_fstype = false; |
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char **mounts = NULL; |
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int opt; |
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int result; |
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|
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#define DO_REG(_var) \ |
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if (_var) free (_var); \ |
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_var = get_regex (optarg); |
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|
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while ((opt = getopt_long (argc, argv, getoptstring, |
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longopts, (int *) 0)) != -1) |
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{ |
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switch (opt) { |
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case 'f': |
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DO_REG (fstype_regex); |
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break; |
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case 'F': |
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DO_REG (skip_fstype_regex); |
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break; |
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case 'n': |
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DO_REG (node_regex); |
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break; |
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case 'N': |
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DO_REG (skip_node_regex); |
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break; |
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case 'p': |
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DO_REG (point_regex); |
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break; |
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case 'P': |
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DO_REG (skip_point_regex); |
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break; |
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case 'o': |
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list_nodes = true; |
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list_fstype = false; |
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break; |
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case 's': |
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list_nodes = false; |
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list_fstype = true; |
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break; |
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|
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case_RC_COMMON_GETOPT |
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} |
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} |
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|
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while (optind < argc) { |
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if (argv[optind][0] != '/') |
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eerrorx ("%s: `%s' is not a mount point", argv[0], argv[optind]); |
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mounts = rc_strlist_add (mounts, argv[optind++]); |
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} |
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|
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nodes = find_mounts (node_regex, skip_node_regex, |
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fstype_regex, skip_fstype_regex, |
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mounts, list_nodes, list_fstype); |
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|
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if (node_regex) |
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regfree (node_regex); |
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if (skip_node_regex) |
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regfree (skip_node_regex); |
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if (fstype_regex) |
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regfree (fstype_regex); |
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if (skip_fstype_regex) |
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regfree (skip_fstype_regex); |
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|
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rc_strlist_reverse (nodes); |
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|
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result = EXIT_FAILURE; |
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STRLIST_FOREACH (nodes, node, i) { |
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if (point_regex && regexec (point_regex, node, 0, NULL, 0) != 0) |
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continue; |
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if (skip_point_regex && regexec (skip_point_regex, node, 0, NULL, 0) == 0) |
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continue; |
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printf ("%s\n", node); |
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result = EXIT_SUCCESS; |
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} |
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rc_strlist_free (nodes); |
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|
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if (point_regex) |
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regfree (point_regex); |
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if (skip_point_regex) |
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regfree (skip_point_regex); |
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|
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exit (result); |
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} |
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