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-rw-r--r--toys/pending/mount.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/toys/pending/mount.c b/toys/pending/mount.c
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--- /dev/null
+++ b/toys/pending/mount.c
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+/* mount.c - mount filesystems
+ *
+ * Copyright 2014 Rob Landley <rob@landley.net>
+ *
+ * See http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/mount.html
+ * Note: -hV is bad spec, haven't implemented -FsLU yet
+ * no mtab (/proc/mounts does it) so -n is NOP.
+
+USE_MOUNT(NEWTOY(mount, ">2afnrvwt:o*[-rw]", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_STAYROOT))
+
+config MOUNT
+ bool "mount"
+ default n
+ help
+ usage: mount [-afFrsvw] [-t TYPE] [-o OPTIONS...] [[DEVICE] DIR]
+
+ Mount new filesystem(s) on directories. With no arguments, display existing
+ mounts.
+
+ -a mount all entries in /etc/fstab (with -t, only entries of that TYPE)
+ -f fake it (don't actually mount)
+ -r read only (same as -o ro)
+ -w read/write (default, same as -o rw)
+ -t specify filesystem type
+ -v verbose
+
+ OPTIONS is a comma separated list of options, which can also be supplied
+ as --longopts.
+
+
+
+config MOUNT_AUTODETECT
+ help
+ usage: mount
+
+ This mount autodetects loopback mounts (a file on a directory) and
+ bind mounts (file on file, directory on directory), so you don't need
+ to say --bind or --loop.
+*/
+
+#define FOR_mount
+#include "toys.h"
+
+GLOBALS(
+ struct arg_list *optlist;
+ char *type;
+
+ unsigned long flags;
+ char *opts;
+)
+
+static void do_mount(char *dev, char *dir, char *type, unsigned long flags, char *opts)
+{
+ FILE *fp = 0;
+ int rc = EINVAL;
+
+ if (toys.optflags & FLAG_f) return;
+
+ if (!TT.type) fp = xfopen("/proc/filesystems", "r");
+
+ for (;;) {
+ char *buf = 0;
+
+ // If type wasn't specified, try all of them in order.
+ if (fp) {
+ size_t i;
+
+ if (getline(&buf, &i, fp)<0) break;
+ type = buf;
+ // skip nodev devices
+ if (!isspace(*type)) {
+ free(buf);
+ continue;
+ }
+ // trim whitespace
+ while (isspace(*type)) type++;
+ i = strlen(type);
+ if (i) type[i-1] = 0;
+ }
+ rc = mount(dev, dir, type, flags, opts);
+ if (!fp || (rc && errno != EINVAL)) break;
+ free(buf);
+ }
+ if (fp) fclose(fp);
+
+ if (rc) perror_msg("'%s' on '%s'", dev, dir);
+}
+
+void mount_main(void)
+{
+ if (toys.optflags & FLAG_a) {
+ fprintf(stderr, "not yet\n");
+ return;
+ }
+
+ // show mounts
+ if (!toys.optc) {
+ struct mtab_list *mtl = xgetmountlist(0), *m;
+
+ for (mtl = xgetmountlist(0); mtl && (m = dlist_pop(&mtl)); free(m)) {
+ char *s = 0;
+
+ if (TT.type && strcmp(TT.type, m->type)) continue;
+ if (*m->device == '/') s = xabspath(m->device, 0);
+ xprintf("%s on %s type %s (%s)\n",
+ s ? s : m->device, m->dir, m->type, m->opts);
+ free(s);
+ }
+
+ // one argument: from fstab, remount, subtree
+ } else if (toys.optc == 1) {
+ fprintf(stderr, "not yet\n");
+ return;
+ // two arguments
+ } else do_mount(toys.optargs[0], toys.optargs[1], TT.type, 0, "");
+}