diff options
| -rw-r--r-- | init/reboot.c | 3 | ||||
| -rw-r--r-- | internal.h | 1 | ||||
| -rw-r--r-- | reboot.c | 3 | ||||
| -rw-r--r-- | utility.c | 43 |
4 files changed, 39 insertions, 11 deletions
diff --git a/init/reboot.c b/init/reboot.c index 53a3520..17ec9f8 100644 --- a/init/reboot.c +++ b/init/reboot.c @@ -26,5 +26,6 @@ extern int reboot_main(int argc, char ** argv) { - exit( kill(1, SIGUSR2)); + /* don't assume init's pid == 1 */ + exit( kill(findInitPid(), SIGUSR2)); } @@ -157,6 +157,7 @@ extern void write_mtab(char* blockDevice, char* directory, extern void erase_mtab(const char * name); extern int check_wildcard_match(const char* text, const char* pattern); extern long getNum (const char *cp); +extern pid_t findInitPid(); #if defined BB_MTAB @@ -26,5 +26,6 @@ extern int reboot_main(int argc, char ** argv) { - exit( kill(1, SIGUSR2)); + /* don't assume init's pid == 1 */ + exit( kill(findInitPid(), SIGUSR2)); } @@ -1068,14 +1068,39 @@ extern long getNum (const char *cp) } #endif +#if 1 +/* findInitPid() + * + * This finds the pid of init (which is not always 1). + * Currently, it's implemented by rummaging through the proc filesystem. + * + * [return] + * 0 failure + * pid when init's pid is found. + */ +extern pid_t +findInitPid() +{ + pid_t init_pid; + char filename[256]; + char buffer[256]; + + /* no need to opendir ;) */ + for (init_pid = 1; init_pid < 65536; init_pid++) { + FILE *status; + + sprintf(filename, "/proc/%d/status", init_pid); + status = fopen(filename, "r"); + if (!status) { continue; } + fgets(buffer, 256, status); + fclose(status); + + if ( (strcmp(&buffer[6], "init\n") == 0)) { + return init_pid; + } + } + return 0; +} +#endif /* END CODE */ - - - - - - - - - |