emo/busybox
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*: introduce and use xvfork()

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function                                             old     new   delta
time_main                                           1052    1285    +233
crontab_main                                         623     856    +233
ifupdown_main                                       2202    2403    +201
xvfork                                                 -      20     +20
passwd_main                                         1049    1053      +4
grave                                               1068    1066      -2
script_main                                          935     921     -14
vfork_or_die                                          20       -     -20
vfork_compressor                                     206     175     -31
open_as_user                                         109       -    -109
popen2                                               218       -    -218
edit_file                                            910     690    -220
run_command                                          268       -    -268
------------------------------------------------------------------------------
(add/remove: 1/4 grow/shrink: 4/4 up/down: 691/-882)         Total: -191 bytes
This commit is contained in:
Denis Vlasenko
2008-07-01 10:40:41 +00:00
parent 148f67af9d
commit 3da5572bfa
12 changed files with 18 additions and 42 deletions
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11
networking/sendmail.c
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@ -120,15 +120,6 @@ static void signal_handler(int signo)
#undef err
}
/* libbb candidate */
static pid_t vfork_or_die(void)
{
pid_t pid = vfork();
if (pid < 0)
bb_perror_msg_and_die("vfork");
return pid;
}
static void launch_helper(const char **argv)
{
// setup vanilla unidirectional pipes interchange
@ -137,7 +128,7 @@ static void launch_helper(const char **argv)
xpipe(pipes);
xpipe(pipes+2);
helper_pid = vfork_or_die();
helper_pid = xvfork();
idx = (!helper_pid) * 2;
xdup2(pipes[idx], STDIN_FILENO);
xdup2(pipes[3-idx], STDOUT_FILENO);