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| author | Denis Vlasenko <vda.linux@googlemail.com> | 2007-01-21 00:41:04 +0000 |
|---|---|---|
| committer | Denis Vlasenko <vda.linux@googlemail.com> | 2007-01-21 00:41:04 +0000 |
| commit | 2f0c0d0b8829b8aea97bc09833e172c59b55cd94 (patch) | |
| tree | 3e82c2dd94d674a723f3d7df350f32dc8892adc1 /init | |
| parent | b3f3c23f786a2486a8545ef0d904061ac83e6453 (diff) | |
| download | busybox-2f0c0d0b8829b8aea97bc09833e172c59b55cd94.tar.gz | |
Introduce FEATURE_EXEC_PREFER_APPLETS = "re-execute our own
executable if we asked to exec someting with argv[0] == known_applet"
Use it in init. Also respect PATH in init, remove explicit "/sbin" etc
from exec. Patch by Gabriel L. Somlo <somlo@cmu.edu>
Diffstat (limited to 'init')
| -rw-r--r-- | init/init.c | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/init/init.c b/init/init.c index 6fc68afb1..7694b4448 100644 --- a/init/init.c +++ b/init/init.c @@ -389,6 +389,7 @@ static pid_t run(const struct init_action *a) #include CUSTOMIZED_BANNER #endif "\nPlease press Enter to activate this console. "; + char *prog; /* Block sigchild while forking. */ sigemptyset(&nmask); @@ -560,7 +561,10 @@ static pid_t run(const struct init_action *a) /* Now run it. The new program will take over this PID, * so nothing further in init.c should be run. */ - execv(cmdpath, cmd); + prog = cmdpath; + if (ENABLE_FEATURE_EXEC_PREFER_APPLETS && find_applet_by_name(prog)) + prog = CONFIG_BUSYBOX_EXEC_PATH; + execvp(prog, cmd); /* We're still here? Some error happened. */ message(LOG | CONSOLE, "Bummer, cannot run '%s': %m", cmdpath); @@ -678,6 +682,7 @@ static void exec_signal(int sig ATTRIBUTE_UNUSED) { struct init_action *a, *tmp; sigset_t unblock_signals; + char *prog; for (a = init_action_list; a; a = tmp) { tmp = a->next; @@ -713,7 +718,10 @@ static void exec_signal(int sig ATTRIBUTE_UNUSED) dup(0); messageD(CONSOLE | LOG, "Trying to re-exec %s", a->command); - execl(a->command, a->command, NULL); + prog = a->command; + if (ENABLE_FEATURE_EXEC_PREFER_APPLETS && find_applet_by_name(prog)) + prog = CONFIG_BUSYBOX_EXEC_PATH; + execlp(prog, a->command, NULL); message(CONSOLE | LOG, "exec of '%s' failed: %m", a->command); @@ -852,13 +860,13 @@ static void parse_inittab(void) /* No inittab file -- set up some default behavior */ #endif /* Reboot on Ctrl-Alt-Del */ - new_init_action(CTRLALTDEL, "/sbin/reboot", ""); + new_init_action(CTRLALTDEL, "reboot", ""); /* Umount all filesystems on halt/reboot */ - new_init_action(SHUTDOWN, "/bin/umount -a -r", ""); + new_init_action(SHUTDOWN, "umount -a -r", ""); /* Swapoff on halt/reboot */ - if(ENABLE_SWAPONOFF) new_init_action(SHUTDOWN, "/sbin/swapoff -a", ""); + if(ENABLE_SWAPONOFF) new_init_action(SHUTDOWN, "swapoff -a", ""); /* Prepare to restart init when a HUP is received */ - new_init_action(RESTART, "/sbin/init", ""); + new_init_action(RESTART, "init", ""); /* Askfirst shell on tty1-4 */ new_init_action(ASKFIRST, bb_default_login_shell, ""); new_init_action(ASKFIRST, bb_default_login_shell, VC_2); @@ -1039,9 +1047,9 @@ int init_main(int argc, char **argv) { message(CONSOLE,"Low memory: forcing swapon."); /* swapon -a requires /proc typically */ - new_init_action(SYSINIT, "/bin/mount -t proc proc /proc", ""); + new_init_action(SYSINIT, "mount -t proc proc /proc", ""); /* Try to turn on swap */ - new_init_action(SYSINIT, "/sbin/swapon -a", ""); + new_init_action(SYSINIT, "swapon -a", ""); run_actions(SYSINIT); /* wait and removing */ } } @@ -1068,7 +1076,10 @@ int init_main(int argc, char **argv) putenv("SELINUX_INIT=YES"); if (selinux_init_load_policy(&enforce) == 0) { - execv(argv[0], argv); + char *prog = argv[0]; + if (ENABLE_FEATURE_EXEC_PREFER_APPLETS && find_applet_by_name(prog)) + prog = CONFIG_BUSYBOX_EXEC_PATH; + execvp(prog, argv); } else if (enforce > 0) { /* SELinux in enforcing mode but load_policy failed */ /* At this point, we probably can't open /dev/console, so log() won't work */ |