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Bernhard Fischer provided a mountpoint(1) applet. This is apparently something

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sysvinit provides, and which is used by the debian init scripts.
This commit is contained in:
Rob Landley 2005-08-20 05:07:08 +00:00
parent fc3f048f8f
commit d00b3a5e94
5 changed files with 94 additions and 0 deletions
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3
include/applets.h
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@ -435,6 +435,9 @@
#ifdef CONFIG_MOUNT
APPLET(mount, mount_main, _BB_DIR_BIN, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_MOUNTPOINT
APPLET(mountpoint, mountpoint_main, _BB_DIR_BIN, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_MSH
APPLET_NOUSAGE("msh", msh_main, _BB_DIR_BIN, _BB_SUID_NEVER)
#endif

14
include/usage.h
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@ -1922,6 +1922,20 @@
"$ mount /dev/fd0 /mnt -t msdos -o ro\n" \
"$ mount /tmp/diskimage /opt -t ext2 -o loop\n"
#define mountpoint_trivial_usage \
"[-q] <[-d] DIR | -x DEVICE>"
#define mountpoint_full_usage \
"mountpoint checks if the directory is a mountpoint\n\n" \
"Options:\n" \
"\t-q:\t\tBe more quiet\n" \
"\t-d:\t\tPrint major/minor device number of the filesystem\n" \
"\t-x:\t\tPrint major/minor device number of the blockdevice"
#define mountpoint_example_usage \
"$ mountpoint /proc\n" \
"/proc is not a mountpoint\n" \
"$ mountpoint /sys\n" \
"/sys is a mountpoint\n"
#define mt_trivial_usage \
"[-f device] opcode value"
#define mt_full_usage \

6
miscutils/Config.in
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@ -194,6 +194,12 @@ config CONFIG_FEATURE_MAKEDEVS_TABLE
endchoice
config CONFIG_MOUNTPOINT
bool "mountpoint"
default n
help
mountpoint checks if the directory is a mountpoint.
config CONFIG_MT
bool "mt"
default n

1
miscutils/Makefile.in
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@ -34,6 +34,7 @@ MISCUTILS-$(CONFIG_EJECT) += eject.o
MISCUTILS-$(CONFIG_HDPARM) += hdparm.o
MISCUTILS-$(CONFIG_LAST) += last.o
MISCUTILS-$(CONFIG_MAKEDEVS) += makedevs.o
MISCUTILS-$(CONFIG_MOUNTPOINT) += mountpoint.o
MISCUTILS-$(CONFIG_MT) += mt.o
MISCUTILS-$(CONFIG_RX) += rx.o
MISCUTILS-$(CONFIG_SETSID) += setsid.o

70
miscutils/mountpoint.c Normal file
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@ -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;
}
}