diff options
| author | Denys Vlasenko <vda.linux@googlemail.com> | 2016-04-02 18:06:24 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2016-04-02 18:06:24 +0200 |
| commit | 8220399173cf8d25e37059cadac96ac30f94e82a (patch) | |
| tree | ffe5ae4a783c8ddeceda15f57eae74ee69feebea /libbb | |
| parent | c87e81f9440278dd46a3eddd1e0f4773afd46a95 (diff) | |
| download | busybox-8220399173cf8d25e37059cadac96ac30f94e82a.tar.gz | |
nsenter,unshare: share common code; fix a bug of not closing all fds
function old new delta
xvfork_parent_waits_and_exits - 64 +64
exec_prog_or_SHELL - 39 +39
unshare_main 873 810 -63
nsenter_main 663 596 -67
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 0/2 up/down: 106/-130) Total: -27 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb')
| -rw-r--r-- | libbb/executable.c | 11 | ||||
| -rw-r--r-- | libbb/xfuncs_printf.c | 16 |
2 files changed, 26 insertions, 1 deletions
diff --git a/libbb/executable.c b/libbb/executable.c index 85ecc3e6c..05e70312f 100644 --- a/libbb/executable.c +++ b/libbb/executable.c @@ -83,10 +83,19 @@ int FAST_FUNC BB_EXECVP(const char *file, char *const argv[]) } #endif -int FAST_FUNC BB_EXECVP_or_die(char **argv) +void FAST_FUNC BB_EXECVP_or_die(char **argv) { BB_EXECVP(argv[0], argv); /* SUSv3-mandated exit codes */ xfunc_error_retval = (errno == ENOENT) ? 127 : 126; bb_perror_msg_and_die("can't execute '%s'", argv[0]); } + +/* Typical idiom for applets which exec *optional* PROG [ARGS] */ +void FAST_FUNC exec_prog_or_SHELL(char **argv) +{ + if (argv[0]) { + BB_EXECVP_or_die(argv); + } + run_shell(getenv("SHELL"), /*login:*/ 1, NULL, NULL); +} diff --git a/libbb/xfuncs_printf.c b/libbb/xfuncs_printf.c index 4aa1b5ce2..e9222f690 100644 --- a/libbb/xfuncs_printf.c +++ b/libbb/xfuncs_printf.c @@ -659,3 +659,19 @@ pid_t FAST_FUNC xfork(void) return pid; } #endif + +void FAST_FUNC xvfork_parent_waits_and_exits(void) +{ + pid_t pid; + + fflush_all(); + pid = xvfork(); + if (pid > 0) { + /* Parent */ + int exit_status = wait_for_exitstatus(pid); + if (WIFSIGNALED(exit_status)) + kill_myself_with_sig(WTERMSIG(exit_status)); + _exit(WEXITSTATUS(exit_status)); + } + /* Child continues */ +} |