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libbb: introduce and use safe_waitpid (loops in EINTR)

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*: use more approproate (shorter) versions of wait()

function                                             old     new   delta
safe_waitpid                                           -      48     +48
wait_any_nohang                                        -      17     +17
send_tree                                            365     369      +4
processorstop                                        432     435      +3
text_yank                                            110     108      -2
make_human_readable_str                              202     200      -2
crond_main                                          1368    1366      -2
handle_sigchld                                        49      43      -6
reapchild                                            166     159      -7
custom                                               260     250     -10
checkscript                                          191     177     -14
wait_nohang                                           17       -     -17
wait_pid                                              43       -     -43
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 2/7 up/down: 72/-103)           Total: -31 bytes
This commit is contained in:
Denis Vlasenko
2008-01-02 19:55:04 +00:00
parent 27963980db
commit fb0eba706c
18 changed files with 51 additions and 55 deletions
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4
include/libbb.h
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@@ -587,9 +587,9 @@ pid_t xspawn(char **argv);
* if (rc < 0) bb_perror_msg("%s", argv[0]);
* if (rc > 0) bb_error_msg("exit code: %d", rc);
*/
int safe_waitpid(int pid, int *wstat, int options);
int wait4pid(int pid);
int wait_pid(int *wstat, int pid);
int wait_nohang(int *wstat);
int wait_any_nohang(int *wstat);
#define wait_crashed(w) ((w) & 127)
#define wait_exitcode(w) ((w) >> 8)
#define wait_stopsig(w) ((w) >> 8)