diff options
Diffstat (limited to 'package/busybox/patches/340-lock_util.patch')
| -rw-r--r-- | package/busybox/patches/340-lock_util.patch | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/package/busybox/patches/340-lock_util.patch b/package/busybox/patches/340-lock_util.patch new file mode 100644 index 000000000..f5c0c2e89 --- /dev/null +++ b/package/busybox/patches/340-lock_util.patch @@ -0,0 +1,167 @@ +diff -urN busybox.old/include/applets.h busybox.dev/include/applets.h +--- busybox.old/include/applets.h 2006-04-05 01:06:29.000000000 +0200 ++++ busybox.dev/include/applets.h 2006-04-05 01:19:09.000000000 +0200 +@@ -167,6 +167,7 @@ + USE_LN(APPLET(ln, ln_main, _BB_DIR_BIN, _BB_SUID_NEVER)) + USE_LOADFONT(APPLET(loadfont, loadfont_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)) + USE_LOADKMAP(APPLET(loadkmap, loadkmap_main, _BB_DIR_SBIN, _BB_SUID_NEVER)) ++USE_LOCK(APPLET_NOUSAGE(lock, lock_main, _BB_DIR_BIN, _BB_SUID_NEVER)) + USE_LOGGER(APPLET(logger, logger_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)) + USE_LOGIN(APPLET(login, login_main, _BB_DIR_BIN, _BB_SUID_ALWAYS)) + USE_LOGNAME(APPLET(logname, logname_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)) +diff -urN busybox.old/miscutils/Config.in busybox.dev/miscutils/Config.in +--- busybox.old/miscutils/Config.in 2006-03-22 22:16:24.000000000 +0100 ++++ busybox.dev/miscutils/Config.in 2006-04-05 01:07:12.000000000 +0200 +@@ -209,6 +209,12 @@ + Enables the 'hdparm -d' option to get/set using_dma flag. + This is dangerous stuff, so you should probably say N. + ++config CONFIG_LOCK ++ bool "lock" ++ default y ++ help ++ Small utility for using locks in scripts ++ + config CONFIG_MAKEDEVS + bool "makedevs" + default n +diff -urN busybox.old/miscutils/Makefile.in busybox.dev/miscutils/Makefile.in +--- busybox.old/miscutils/Makefile.in 2006-03-22 22:16:24.000000000 +0100 ++++ busybox.dev/miscutils/Makefile.in 2006-04-05 01:10:50.000000000 +0200 +@@ -20,6 +20,7 @@ + MISCUTILS-$(CONFIG_EJECT) += eject.o + MISCUTILS-$(CONFIG_HDPARM) += hdparm.o + MISCUTILS-$(CONFIG_LAST) += last.o ++MISCUTILS-$(CONFIG_LOCK) += lock.o + MISCUTILS-${CONFIG_LESS} += less.o + MISCUTILS-$(CONFIG_MAKEDEVS) += makedevs.o + MISCUTILS-$(CONFIG_MOUNTPOINT) += mountpoint.o +diff -urN busybox.old/miscutils/lock.c busybox.dev/miscutils/lock.c +--- busybox.old/miscutils/lock.c 1970-01-01 01:00:00.000000000 +0100 ++++ busybox.dev/miscutils/lock.c 2006-04-05 01:07:12.000000000 +0200 +@@ -0,0 +1,125 @@ ++#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); ++ unlink(file); ++ exit(0); ++} ++ ++static int do_unlock(void) ++{ ++ FILE *f; ++ int i; ++ ++ f = fopen(file, "r"); ++ 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, 0700)) < 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; ++ } ++} ++ ++#ifndef CONFIG_LOCK ++int main(int argc, char **argv) ++#else ++int lock_main(int argc, char **argv) ++#endif ++{ ++ 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(); ++} |