Reverend Homer
2018-12-04 21:28:20 UTC
<...>
+
+// Get a linked list of mount points, with stat information.
+#ifdef __APPLE__
+
+// Not implemented for macOS.
+// See <sys/mount.h>'s getmntinfo(3) for the BSD API.
+
Shouldn't there be some warning?+
+// Get a linked list of mount points, with stat information.
+#ifdef __APPLE__
+
+// Not implemented for macOS.
+// See <sys/mount.h>'s getmntinfo(3) for the BSD API.
+
R.H.
+#else
+
+#include <mntent.h>
+
+static void octal_deslash(char *s)
+{
+ char *o = s;
+
+ while (*s) {
+ if (*s == '\\') {
+ int i, oct = 0;
+
+ for (i = 1; i < 4; i++) {
+ if (!isdigit(s[i])) break;
+ oct = (oct<<3)+s[i]-'0';
+ }
+ if (i == 4) {
+ *o++ = oct;
+ s += i;
+ continue;
+ }
+ }
+ *o++ = *s++;
+ }
+
+ *o = 0;
+}
+
+// Check if this type matches list.
+// Odd syntax: typelist all yes = if any, typelist all no = if none.
+
+int mountlist_istype(struct mtab_list *ml, char *typelist)
+{
+ int len, skip;
+ char *t;
+
+ if (!typelist) return 1;
+
+ skip = strncmp(typelist, "no", 2);
+
+ for (;;) {
+ if (!(t = comma_iterate(&typelist, &len))) break;
+ if (!skip) {
+ // If one -t starts with "no", the rest must too
+ if (strncmp(t, "no", 2)) error_exit("bad typelist");
+ if (!strncmp(t+2, ml->type, len-2)) {
+ skip = 1;
+ break;
+ }
+ } else if (!strncmp(t, ml->type, len) && !ml->type[len]) {
+ skip = 0;
+ break;
+ }
+ }
+
+ return !skip;
+}
+
+// Get list of mounted filesystems, including stat and statvfs info.
+// Returns a reversed list, which is good for finding overmounts and such.
+
+struct mtab_list *xgetmountlist(char *path)
+{
+ struct mtab_list *mtlist = 0, *mt;
+ struct mntent *me;
+ FILE *fp;
+ char *p = path ? path : "/proc/mounts";
+
+ if (!(fp = setmntent(p, "r"))) perror_exit("bad %s", p);
+
+ // The "test" part of the loop is done before the first time through and
+ // again after each "increment", so putting the actual load there avoids
+ // duplicating it. If the load was NULL, the loop stops.
+
+ while ((me = getmntent(fp))) {
+ mt = xzalloc(sizeof(struct mtab_list) + strlen(me->mnt_fsname) +
+ strlen(me->mnt_dir) + strlen(me->mnt_type) + strlen(me->mnt_opts) + 4);
+ dlist_add_nomalloc((void *)&mtlist, (void *)mt);
+
+ // Collect details about mounted filesystem
+ // Don't report errors, just leave data zeroed
+ if (!path) {
+ stat(me->mnt_dir, &(mt->stat));
+ statvfs(me->mnt_dir, &(mt->statvfs));
+ }
+
+ // Remember information from /proc/mounts
+ mt->dir = stpcpy(mt->type, me->mnt_type)+1;
+ mt->device = stpcpy(mt->dir, me->mnt_dir)+1;
+ mt->opts = stpcpy(mt->device, me->mnt_fsname)+1;
+ strcpy(mt->opts, me->mnt_opts);
+
+ octal_deslash(mt->dir);
+ octal_deslash(mt->device);
+ }
+ endmntent(fp);
+
+ return mtlist;
+}
+
+#endif
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+
+#include <mntent.h>
+
+static void octal_deslash(char *s)
+{
+ char *o = s;
+
+ while (*s) {
+ if (*s == '\\') {
+ int i, oct = 0;
+
+ for (i = 1; i < 4; i++) {
+ if (!isdigit(s[i])) break;
+ oct = (oct<<3)+s[i]-'0';
+ }
+ if (i == 4) {
+ *o++ = oct;
+ s += i;
+ continue;
+ }
+ }
+ *o++ = *s++;
+ }
+
+ *o = 0;
+}
+
+// Check if this type matches list.
+// Odd syntax: typelist all yes = if any, typelist all no = if none.
+
+int mountlist_istype(struct mtab_list *ml, char *typelist)
+{
+ int len, skip;
+ char *t;
+
+ if (!typelist) return 1;
+
+ skip = strncmp(typelist, "no", 2);
+
+ for (;;) {
+ if (!(t = comma_iterate(&typelist, &len))) break;
+ if (!skip) {
+ // If one -t starts with "no", the rest must too
+ if (strncmp(t, "no", 2)) error_exit("bad typelist");
+ if (!strncmp(t+2, ml->type, len-2)) {
+ skip = 1;
+ break;
+ }
+ } else if (!strncmp(t, ml->type, len) && !ml->type[len]) {
+ skip = 0;
+ break;
+ }
+ }
+
+ return !skip;
+}
+
+// Get list of mounted filesystems, including stat and statvfs info.
+// Returns a reversed list, which is good for finding overmounts and such.
+
+struct mtab_list *xgetmountlist(char *path)
+{
+ struct mtab_list *mtlist = 0, *mt;
+ struct mntent *me;
+ FILE *fp;
+ char *p = path ? path : "/proc/mounts";
+
+ if (!(fp = setmntent(p, "r"))) perror_exit("bad %s", p);
+
+ // The "test" part of the loop is done before the first time through and
+ // again after each "increment", so putting the actual load there avoids
+ // duplicating it. If the load was NULL, the loop stops.
+
+ while ((me = getmntent(fp))) {
+ mt = xzalloc(sizeof(struct mtab_list) + strlen(me->mnt_fsname) +
+ strlen(me->mnt_dir) + strlen(me->mnt_type) + strlen(me->mnt_opts) + 4);
+ dlist_add_nomalloc((void *)&mtlist, (void *)mt);
+
+ // Collect details about mounted filesystem
+ // Don't report errors, just leave data zeroed
+ if (!path) {
+ stat(me->mnt_dir, &(mt->stat));
+ statvfs(me->mnt_dir, &(mt->statvfs));
+ }
+
+ // Remember information from /proc/mounts
+ mt->dir = stpcpy(mt->type, me->mnt_type)+1;
+ mt->device = stpcpy(mt->dir, me->mnt_dir)+1;
+ mt->opts = stpcpy(mt->device, me->mnt_fsname)+1;
+ strcpy(mt->opts, me->mnt_opts);
+
+ octal_deslash(mt->dir);
+ octal_deslash(mt->device);
+ }
+ endmntent(fp);
+
+ return mtlist;
+}
+
+#endif
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