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nsenter,unshare: share common code; fix a bug of not closing all fds

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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
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(add/remove: 2/0 grow/shrink: 0/2 up/down: 106/-130)          Total: -27 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2016-04-02 18:06:24 +02:00
parent c87e81f944
commit 8220399173
5 changed files with 38 additions and 35 deletions
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16
libbb/xfuncs_printf.c
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@ -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 */
}