diff options
| author | Denys Vlasenko <vda.linux@googlemail.com> | 2019-03-26 18:34:06 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2019-03-26 18:34:06 +0100 |
| commit | 4d1c5149a09722cd6dcf718812a347db60110706 (patch) | |
| tree | cb95c5ea875d5a66dac60c304e449e7bb743d5e0 | |
| parent | 3c6f3336e124be483e4852f022b1d07c1d2f7f2c (diff) | |
| download | busybox-4d1c5149a09722cd6dcf718812a347db60110706.tar.gz | |
hush: add "wait -n" bashism
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | shell/hush.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/shell/hush.c b/shell/hush.c index 920a85299..7c907686e 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -8763,7 +8763,11 @@ static int checkjobs(struct pipe *fg_pipe, pid_t waitfor_pid) /* fg_pipe exited or stopped */ break; } - if (childpid == waitfor_pid) { + if (childpid == waitfor_pid /* "wait PID" */ +#if ENABLE_HUSH_BASH_COMPAT + || -1 == waitfor_pid /* "wait -n" (wait for any one child) */ +#endif + ) { debug_printf_exec("childpid==waitfor_pid:%d status:0x%08x\n", childpid, status); rcode = WEXITSTATUS(status); if (WIFSIGNALED(status)) @@ -11471,6 +11475,12 @@ static int wait_for_child_or_signal(struct pipe *waitfor_pipe, pid_t waitfor_pid ret--; if (ret < 0) /* if ECHILD, may need to fix "ret" */ ret = 0; +#if ENABLE_HUSH_BASH_COMPAT + if (waitfor_pid == -1 && errno == ECHILD) { + /* exitcode of "wait -n" with no children is 127, not 0 */ + ret = 127; + } +#endif sigprocmask(SIG_SETMASK, &oldset, NULL); break; } @@ -11499,6 +11509,12 @@ static int FAST_FUNC builtin_wait(char **argv) int status; argv = skip_dash_dash(argv); +#if ENABLE_HUSH_BASH_COMPAT + if (argv[0] && !argv[1] && strcmp(argv[0], "-n") == 0) { + /* wait -n */ + return wait_for_child_or_signal(NULL, -1 /*(no job, wait for one child)*/); + } +#endif if (argv[0] == NULL) { /* Don't care about wait results */ /* Note 1: must wait until there are no more children */ |