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add awaitfor and waitfor

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This commit is contained in:
rsc 2004-12-27 19:11:21 +00:00
parent 955a2ca78d
commit 0341761074
3 changed files with 30 additions and 10 deletions
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14
src/lib9/await.c
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@ -74,7 +74,7 @@ _p9strsig(char *s)
}
static int
_await(char *str, int n, int opt)
_await(int pid4, char *str, int n, int opt)
{
int pid, status, cd;
struct rusage ru;
@ -82,7 +82,7 @@ _await(char *str, int n, int opt)
ulong u, s;
for(;;){
pid = wait3(&status, opt, &ru);
pid = wait4(pid4, &status, opt, &ru);
if(pid <= 0)
return -1;
u = ru.ru_utime.tv_sec*1000+((ru.ru_utime.tv_usec+500)/1000);
@ -108,12 +108,18 @@ _await(char *str, int n, int opt)
int
await(char *str, int n)
{
return _await(str, n, 0);
return _await(-1, str, n, 0);
}
int
awaitnohang(char *str, int n)
{
return _await(str, n, WNOHANG);
return _await(-1, str, n, WNOHANG);
}
int
awaitfor(int pid, char *str, int n)
{
return _await(pid, str, n, 0);
}