diff options
| -rw-r--r-- | include/applets.h | 3 | ||||
| -rw-r--r-- | include/usage.h | 12 | ||||
| -rw-r--r-- | miscutils/Config.in | 9 | ||||
| -rw-r--r-- | miscutils/Makefile.in | 1 | ||||
| -rw-r--r-- | miscutils/runlevel.c | 43 |
5 files changed, 68 insertions, 0 deletions
diff --git a/include/applets.h b/include/applets.h index 2b2c45d67..ec3a892d0 100644 --- a/include/applets.h +++ b/include/applets.h @@ -565,6 +565,9 @@ #ifdef CONFIG_RUN_PARTS APPLET_ODDNAME("run-parts", run_parts_main, _BB_DIR_BIN, _BB_SUID_NEVER, run_parts) #endif +#if BB_APPLET_RUNLEVEL + APPLET(runlevel, runlevel_main, _BB_DIR_SBIN, _BB_SUID_NEVER) +#endif #ifdef CONFIG_RX APPLET(rx, rx_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER) #endif diff --git a/include/usage.h b/include/usage.h index 79a61d20a..a82230e41 100644 --- a/include/usage.h +++ b/include/usage.h @@ -2450,6 +2450,18 @@ "\t-a ARG\tPass ARG as an argument for every program invoked\n" \ "\t-u MASK\tSet the umask to MASK before executing every program" +#if BB_APPLET_RUNLEVEL +#define runlevel_trivial_usage \ + "[utmp]" +#define runlevel_full_usage \ + "Find the current and previous system runlevel.\n\n" \ + "If no utmp file exists or if no runlevel record can be found,\n" \ + "runlevel prints \"unknown\"" +#define runlevel_example_usage \ + "$ runlevel /var/run/utmp\n" \ + "N 2" +#endif + #define rx_trivial_usage \ "FILE" #define rx_full_usage \ diff --git a/miscutils/Config.in b/miscutils/Config.in index f07ca36b3..4d81dde0d 100644 --- a/miscutils/Config.in +++ b/miscutils/Config.in @@ -255,6 +255,15 @@ config CONFIG_MT to advance or rewind a tape past a specified number of archive files on the tape. +config BB_APPLET_RUNLEVEL + bool "runlevel" + default n + help + find the current and previous system runlevel. + + This applet uses utmp but does not rely on busybox supporing + utmp on purpose. It is used by e.g. emdebian via /etc/init.d/rc. + config CONFIG_RX bool "rx" default n diff --git a/miscutils/Makefile.in b/miscutils/Makefile.in index 808ce36de..5bd522c11 100644 --- a/miscutils/Makefile.in +++ b/miscutils/Makefile.in @@ -24,6 +24,7 @@ MISCUTILS-${CONFIG_LESS} += less.o MISCUTILS-$(CONFIG_MAKEDEVS) += makedevs.o MISCUTILS-$(CONFIG_MOUNTPOINT) += mountpoint.o MISCUTILS-$(CONFIG_MT) += mt.o +MISCUTILS-$(BB_APPLET_RUNLEVEL) += runlevel.o MISCUTILS-$(CONFIG_RX) += rx.o MISCUTILS-$(CONFIG_SETSID) += setsid.o MISCUTILS-$(CONFIG_STRINGS) += strings.o diff --git a/miscutils/runlevel.c b/miscutils/runlevel.c new file mode 100644 index 000000000..dfa846f81 --- /dev/null +++ b/miscutils/runlevel.c @@ -0,0 +1,43 @@ +/* + * runlevel Prints out the previous and the current runlevel. + * + * Version: @(#)runlevel 1.20 16-Apr-1997 MvS + * + * This file is part of the sysvinit suite, + * Copyright 1991-1997 Miquel van Smoorenburg. + * + * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. + * + * initially busyboxified by Bernhard Fischer + */ + +#include <stdio.h> +#include <utmp.h> +#include <time.h> +#include <stdlib.h> + +#include "busybox.h" + +int runlevel_main(int argc, char *argv[]) +{ + struct utmp *ut; + char prev; + + if (argc > 1) utmpname(argv[1]); + + setutent(); + while ((ut = getutent()) != NULL) { + if (ut->ut_type == RUN_LVL) { + prev = ut->ut_pid / 256; + if (prev == 0) prev = 'N'; + printf("%c %c\n", prev, ut->ut_pid % 256); + endutent(); + return (0); + } + } + + printf("unknown\n"); + endutent(); + return (1); +} + |