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implement wait builtin

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This commit is contained in:
Mike Frysinger 2009-03-28 20:01:58 +00:00
parent e61f07f036
commit 56bdea1b43
1 changed files with 35 additions and 0 deletions
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35
shell/hush.c
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@ -524,6 +524,7 @@ static int builtin_shift(char **argv);
static int builtin_source(char **argv);
static int builtin_umask(char **argv);
static int builtin_unset(char **argv);
static int builtin_wait(char **argv);
#if ENABLE_HUSH_LOOPS
static int builtin_break(char **argv);
static int builtin_continue(char **argv);
@ -582,6 +583,7 @@ static const struct built_in_command bltins[] = {
// BLTIN("ulimit", builtin_not_written, "Control resource limits"),
BLTIN("umask" , builtin_umask, "Set file creation mask"),
BLTIN("unset" , builtin_unset, "Unset environment variable"),
BLTIN("wait" , builtin_wait, "Wait for process"),
#if ENABLE_HUSH_HELP
BLTIN("help" , builtin_help, "List shell built-in commands"),
#endif
@ -4895,6 +4897,39 @@ static int builtin_unset(char **argv)
return EXIT_SUCCESS;
}
/* http://www.opengroup.org/onlinepubs/9699919799/utilities/wait.html */
static int builtin_wait(char **argv)
{
int ret = EXIT_SUCCESS;
int status;
if (argv[1] == NULL)
/* don't care about exit status */
wait(&status);
while (argv[1]) {
char *endp;
pid_t pid = bb_strtou(argv[1], &endp, 10);
if (*endp) {
bb_perror_msg("wait %s", argv[1]);
return EXIT_FAILURE;
} else if (waitpid(pid, &status, 0) == pid) {
if (WIFSIGNALED(status))
ret = 128 + WTERMSIG(status);
else if (WIFEXITED(status))
ret = WEXITSTATUS(status);
else
ret = EXIT_FAILURE;
} else {
bb_perror_msg("wait %s", argv[1]);
ret = 127;
}
++argv;
}
return ret;
}
#if ENABLE_HUSH_LOOPS
static int builtin_break(char **argv)
{