179 lines
4.3 KiB
Diff
179 lines
4.3 KiB
Diff
Index: busybox-1.8.1/include/applets.h
|
|
===================================================================
|
|
--- busybox-1.8.1.orig/include/applets.h 2007-11-10 16:54:28.318054115 +0100
|
|
+++ busybox-1.8.1/include/applets.h 2007-11-10 17:39:21.487529096 +0100
|
|
@@ -218,6 +218,7 @@
|
|
USE_LOAD_POLICY(APPLET(load_policy, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
|
|
USE_LOADFONT(APPLET(loadfont, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
|
|
USE_LOADKMAP(APPLET(loadkmap, _BB_DIR_SBIN, _BB_SUID_NEVER))
|
|
+USE_LOCK(APPLET_NOUSAGE(lock, lock, _BB_DIR_BIN, _BB_SUID_NEVER))
|
|
USE_LOGGER(APPLET(logger, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
|
|
USE_LOGIN(APPLET(login, _BB_DIR_BIN, _BB_SUID_ALWAYS))
|
|
USE_LOGNAME(APPLET_NOFORK(logname, logname, _BB_DIR_USR_BIN, _BB_SUID_NEVER, logname))
|
|
Index: busybox-1.8.1/miscutils/Config.in
|
|
===================================================================
|
|
--- busybox-1.8.1.orig/miscutils/Config.in 2007-11-10 16:54:16.477379354 +0100
|
|
+++ busybox-1.8.1/miscutils/Config.in 2007-11-10 16:54:28.366056851 +0100
|
|
@@ -244,6 +244,12 @@
|
|
Enables the 'hdparm -d' option to get/set using_dma flag.
|
|
This is dangerous stuff, so you should probably say N.
|
|
|
|
+config LOCK
|
|
+ bool "lock"
|
|
+ default y
|
|
+ help
|
|
+ Small utility for using locks in scripts
|
|
+
|
|
config MAKEDEVS
|
|
bool "makedevs"
|
|
default n
|
|
Index: busybox-1.8.1/miscutils/Kbuild
|
|
===================================================================
|
|
--- busybox-1.8.1.orig/miscutils/Kbuild 2007-11-10 16:54:16.481379580 +0100
|
|
+++ busybox-1.8.1/miscutils/Kbuild 2007-11-10 16:54:28.370057076 +0100
|
|
@@ -16,6 +16,7 @@
|
|
lib-$(CONFIG_HDPARM) += hdparm.o
|
|
lib-$(CONFIG_LAST) += last.o
|
|
lib-$(CONFIG_LESS) += less.o
|
|
+lib-$(CONFIG_LOCK) += lock.o
|
|
lib-$(CONFIG_MAKEDEVS) += makedevs.o
|
|
lib-$(CONFIG_MICROCOM) += microcom.o
|
|
lib-$(CONFIG_MOUNTPOINT) += mountpoint.o
|
|
Index: busybox-1.8.1/miscutils/lock.c
|
|
===================================================================
|
|
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
|
|
+++ busybox-1.8.1/miscutils/lock.c 2007-11-10 17:40:37.203843924 +0100
|
|
@@ -0,0 +1,132 @@
|
|
+/*
|
|
+ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
|
|
+ *
|
|
+ * This is free software, licensed under the GNU General Public License v2.
|
|
+ */
|
|
+#include <sys/types.h>
|
|
+#include <sys/file.h>
|
|
+#include <sys/stat.h>
|
|
+#include <signal.h>
|
|
+#include <fcntl.h>
|
|
+#include <unistd.h>
|
|
+#include <stdio.h>
|
|
+#include "busybox.h"
|
|
+
|
|
+static int unlock = 0;
|
|
+static int shared = 0;
|
|
+static int waitonly = 0;
|
|
+static int fd;
|
|
+static char *file;
|
|
+
|
|
+static void usage(char *name)
|
|
+{
|
|
+ fprintf(stderr, "Usage: %s [-suw] <filename>\n"
|
|
+ " -s Use shared locking\n"
|
|
+ " -u Unlock\n"
|
|
+ " -w Wait for the lock to become free, don't acquire lock\n"
|
|
+ "\n", name);
|
|
+ exit(1);
|
|
+}
|
|
+
|
|
+static void exit_unlock(int sig)
|
|
+{
|
|
+ flock(fd, LOCK_UN);
|
|
+ exit(0);
|
|
+}
|
|
+
|
|
+static int do_unlock(void)
|
|
+{
|
|
+ FILE *f;
|
|
+ int i;
|
|
+
|
|
+ if ((f = fopen(file, "r")) == NULL)
|
|
+ return 0;
|
|
+
|
|
+ fscanf(f, "%d", &i);
|
|
+ if (i > 0)
|
|
+ kill(i, SIGTERM);
|
|
+
|
|
+ fclose(f);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int do_lock(void)
|
|
+{
|
|
+ int pid;
|
|
+ char pidstr[8];
|
|
+
|
|
+ if ((fd = open(file, O_RDWR | O_CREAT | O_EXCL, 0700)) < 0) {
|
|
+ if ((fd = open(file, O_RDWR)) < 0) {
|
|
+ fprintf(stderr, "Can't open %s\n", file);
|
|
+ return 1;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (flock(fd, (shared ? LOCK_SH : LOCK_EX)) < 0) {
|
|
+ fprintf(stderr, "Can't lock %s\n", file);
|
|
+ return 1;
|
|
+ }
|
|
+
|
|
+ pid = fork();
|
|
+
|
|
+ if (pid < 0)
|
|
+ return -1;
|
|
+
|
|
+ if (pid == 0) {
|
|
+ signal(SIGKILL, exit_unlock);
|
|
+ signal(SIGTERM, exit_unlock);
|
|
+ signal(SIGINT, exit_unlock);
|
|
+ if (waitonly)
|
|
+ exit_unlock(0);
|
|
+ else
|
|
+ while (1)
|
|
+ sleep(1);
|
|
+ } else {
|
|
+ if (!waitonly) {
|
|
+ lseek(fd, 0, SEEK_SET);
|
|
+ ftruncate(fd, 0);
|
|
+ sprintf(pidstr, "%d\n", pid);
|
|
+ write(fd, pidstr, strlen(pidstr));
|
|
+ close(fd);
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+ }
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+int lock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
+int lock_main(int argc, char **argv)
|
|
+{
|
|
+ char **args = &argv[1];
|
|
+ int c = argc - 1;
|
|
+
|
|
+ while ((*args != NULL) && (*args)[0] == '-') {
|
|
+ char *ch = *args;
|
|
+ while (*(++ch) > 0) {
|
|
+ switch(*ch) {
|
|
+ case 'w':
|
|
+ waitonly = 1;
|
|
+ break;
|
|
+ case 's':
|
|
+ shared = 1;
|
|
+ break;
|
|
+ case 'u':
|
|
+ unlock = 1;
|
|
+ break;
|
|
+ }
|
|
+ }
|
|
+ c--;
|
|
+ args++;
|
|
+ }
|
|
+
|
|
+ if (c != 1)
|
|
+ usage(argv[0]);
|
|
+
|
|
+ file = *args;
|
|
+ if (unlock)
|
|
+ return do_unlock();
|
|
+ else
|
|
+ return do_lock();
|
|
+}
|