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halt: reinstate -w even if !FEATURE_WTMP; beautify code in halt.c

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This commit is contained in:
Denis Vlasenko
2008-09-11 09:54:23 +00:00
parent 8d89bed840
commit 9725daa03a
2 changed files with 42 additions and 39 deletions
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76
init/halt.c
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@@ -13,44 +13,11 @@
#if ENABLE_FEATURE_WTMP
#include <sys/utsname.h>
#include <utmp.h>
#endif
int halt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int halt_main(int argc UNUSED_PARAM, char **argv)
static void write_wtmp(void)
{
static const int magic[] = {
#ifdef RB_HALT_SYSTEM
RB_HALT_SYSTEM,
#elif defined RB_HALT
RB_HALT,
#endif
#ifdef RB_POWER_OFF
RB_POWER_OFF,
#elif defined RB_POWERDOWN
RB_POWERDOWN,
#endif
RB_AUTOBOOT
};
static const smallint signals[] = { SIGUSR1, SIGUSR2, SIGTERM };
int delay = 0;
int which, flags, rc;
#if ENABLE_FEATURE_WTMP
struct utmp utmp;
struct utsname uts;
#endif
/* Figure out which applet we're running */
for (which = 0; "hpr"[which] != *applet_name; which++)
continue;
/* Parse and handle arguments */
opt_complementary = "d+"; /* -d N */
flags = getopt32(argv, "d:nf" USE_FEATURE_WTMP("w"), &delay);
sleep(delay);
#if ENABLE_FEATURE_WTMP
if (access(bb_path_wtmp_file, R_OK|W_OK) == -1) {
close(creat(bb_path_wtmp_file, 0664));
}
@@ -64,9 +31,48 @@ int halt_main(int argc UNUSED_PARAM, char **argv)
safe_strncpy(utmp.ut_host, uts.release, sizeof(utmp.ut_host));
updwtmp(bb_path_wtmp_file, &utmp);
}
#else
#define write_wtmp() ((void)0)
#endif
#ifndef RB_HALT_SYSTEM
#define RB_HALT_SYSTEM RB_HALT
#endif
#ifndef RB_POWER_OFF
#define RB_POWER_OFF RB_POWERDOWN
#endif
int halt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int halt_main(int argc UNUSED_PARAM, char **argv)
{
static const int magic[] = {
RB_HALT_SYSTEM,
RB_POWER_OFF,
RB_AUTOBOOT
};
static const smallint signals[] = { SIGUSR1, SIGUSR2, SIGTERM };
int delay = 0;
int which, flags, rc;
/* Figure out which applet we're running */
for (which = 0; "hpr"[which] != applet_name[0]; which++)
continue;
/* Parse and handle arguments */
opt_complementary = "d+"; /* -d N */
/* We support -w even if !ENABLE_FEATURE_WTMP, in order
* to not break scripts */
flags = getopt32(argv, "d:nfw", &delay);
sleep(delay);
write_wtmp();
if (flags & 8) /* -w */
return EXIT_SUCCESS;
#endif /* !ENABLE_FEATURE_WTMP */
if (!(flags & 2)) /* no -n */
sync();