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authorGravatar Rob Landley <rob@landley.net>2005-08-20 05:07:08 +0000
committerGravatar Rob Landley <rob@landley.net>2005-08-20 05:07:08 +0000
commitd00b3a5e944e7499bd061c0b8f9d9f0847528fce (patch)
tree2bec1c6e32716bf8bc204ed411e6287ee728e3f9 /miscutils/mountpoint.c
parentfc3f048f8f6de2132c83bbd1124dabd0990a952b (diff)
downloadbusybox-d00b3a5e944e7499bd061c0b8f9d9f0847528fce.tar.gz
busybox-d00b3a5e944e7499bd061c0b8f9d9f0847528fce.tar.bz2
Bernhard Fischer provided a mountpoint(1) applet. This is apparently something
sysvinit provides, and which is used by the debian init scripts.
Diffstat (limited to 'miscutils/mountpoint.c')
-rw-r--r--miscutils/mountpoint.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/miscutils/mountpoint.c b/miscutils/mountpoint.c
new file mode 100644
index 000000000..46b2d4e26
--- /dev/null
+++ b/miscutils/mountpoint.c
@@ -0,0 +1,70 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * mountpoint implementation for busybox
+ *
+ * Copyright (C) 2005 Bernhard Fischer
+ *
+ * Licensed under the GPL v2, see the file LICENSE in this tarball.
+ *
+ * Based on sysvinit's mountpoint
+ */
+
+#include <sys/stat.h>
+#include <errno.h> /* errno */
+#include <string.h> /* strerror */
+#include <getopt.h> /* optind */
+#include "busybox.h"
+
+int mountpoint_main(int argc, char **argv)
+{
+ int opt = bb_getopt_ulflags(argc, argv, "qdx");
+#define OPT_q (1)
+#define OPT_d (2)
+#define OPT_x (4)
+
+ if (optind != argc - 1)
+ bb_show_usage();
+ {
+ char *arg = argv[optind];
+ struct stat st;
+
+ if ( (opt & OPT_x && stat(arg, &st) == 0) || (lstat(arg, &st) == 0) ) {
+ if (opt & OPT_x) {
+ if (S_ISBLK(st.st_mode))
+ {
+ bb_printf("%u:%u\n", major(st.st_rdev),
+ minor(st.st_rdev));
+ return EXIT_SUCCESS;
+ } else {
+ if (opt & OPT_q)
+ putchar('\n');
+ else
+ bb_error_msg("%s: not a block device", arg);
+ }
+ return EXIT_FAILURE;
+ } else
+ if (S_ISDIR(st.st_mode)) {
+ dev_t st_dev = st.st_dev;
+ ino_t st_ino = st.st_ino;
+ char *p;
+ bb_xasprintf(&p, "%s/..", arg);
+ if (stat(p, &st) == 0) {
+ short ret = (st_dev != st.st_dev) ||
+ (st_dev == st.st_dev && st_ino == st.st_ino);
+ if (opt & OPT_d)
+ bb_printf("%u:%u\n", major(st_dev), minor(st_dev));
+ else if (!(opt & OPT_q))
+ bb_printf("%s is %sa mountpoint\n", arg, ret?"":"not ");
+ return !ret;
+ }
+ } else {
+ if (!(opt & OPT_q))
+ bb_error_msg("%s: not a directory", arg);
+ return EXIT_FAILURE;
+ }
+ }
+ if (!(opt & OPT_q))
+ bb_perror_msg(arg);
+ return EXIT_FAILURE;
+ }
+}