137 lines
2.9 KiB
C
137 lines
2.9 KiB
C
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#define NOPLAN9DEFINES
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#include <u.h>
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#include <libc.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#ifndef WCOREDUMP /* not on Mac OS X Tiger */
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#define WCOREDUMP(status) 0
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#endif
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static struct {
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int sig;
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char *str;
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} tab[] = {
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SIGHUP, "hangup",
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SIGINT, "interrupt",
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SIGQUIT, "quit",
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SIGILL, "sys: illegal instruction",
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SIGTRAP, "sys: breakpoint",
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SIGABRT, "sys: abort",
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#ifdef SIGEMT
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SIGEMT, "sys: emulate instruction executed",
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#endif
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SIGFPE, "sys: fp: trap",
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SIGKILL, "sys: kill",
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SIGBUS, "sys: bus error",
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SIGSEGV, "sys: segmentation violation",
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SIGALRM, "alarm",
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SIGTERM, "kill",
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SIGURG, "sys: urgent condition on socket",
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SIGSTOP, "sys: stop",
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SIGTSTP, "sys: tstp",
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SIGCONT, "sys: cont",
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SIGCHLD, "sys: child",
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SIGTTIN, "sys: ttin",
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SIGTTOU, "sys: ttou",
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#ifdef SIGIO /* not on Mac OS X Tiger */
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SIGIO, "sys: i/o possible on fd",
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#endif
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SIGXCPU, "sys: cpu time limit exceeded",
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SIGXFSZ, "sys: file size limit exceeded",
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SIGVTALRM, "sys: virtual time alarm",
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SIGPROF, "sys: profiling timer alarm",
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#ifdef SIGWINCH /* not on Mac OS X Tiger */
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SIGWINCH, "sys: window size change",
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#endif
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#ifdef SIGINFO
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SIGINFO, "sys: status request",
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#endif
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SIGUSR1, "sys: usr1",
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SIGUSR2, "sys: usr2",
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SIGPIPE, "sys: write on closed pipe",
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};
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char*
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_p9sigstr(int sig, char *tmp)
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{
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int i;
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for(i=0; i<nelem(tab); i++)
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if(tab[i].sig == sig)
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return tab[i].str;
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if(tmp == nil)
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return nil;
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sprint(tmp, "sys: signal %d", sig);
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return tmp;
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}
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int
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_p9strsig(char *s)
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{
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int i;
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for(i=0; i<nelem(tab); i++)
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if(strcmp(s, tab[i].str) == 0)
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return tab[i].sig;
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return 0;
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}
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static int
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_await(int pid4, char *str, int n, int opt)
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{
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int pid, status, cd;
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struct rusage ru;
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char buf[128], tmp[64];
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uint64_t u, s;
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for(;;){
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/* On Linux, pid==-1 means anyone; on SunOS, it's pid==0. */
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if(pid4 == -1)
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pid = wait3(&status, opt, &ru);
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else
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pid = wait4(pid4, &status, opt, &ru);
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if(pid <= 0)
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return -1;
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u = ru.ru_utime.tv_sec*1000+((ru.ru_utime.tv_usec+500)/1000);
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s = ru.ru_stime.tv_sec*1000+((ru.ru_stime.tv_usec+500)/1000);
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if(WIFEXITED(status)){
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status = WEXITSTATUS(status);
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if(status)
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snprint(buf, sizeof buf, "%d %lud %lud %lud %d", pid, u, s, u+s, status);
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else
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snprint(buf, sizeof buf, "%d %lud %lud %lud ''", pid, u, s, u+s, status);
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strecpy(str, str+n, buf);
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return strlen(str);
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}
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if(WIFSIGNALED(status)){
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cd = WCOREDUMP(status);
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snprint(buf, sizeof buf, "%d %lud %lud %lud 'signal: %s%s'", pid, u, s, u+s, _p9sigstr(WTERMSIG(status), tmp), cd ? " (core dumped)" : "");
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strecpy(str, str+n, buf);
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return strlen(str);
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}
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}
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}
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int
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await(char *str, int n)
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{
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return _await(-1, str, n, 0);
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}
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int
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awaitnohang(char *str, int n)
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{
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return _await(-1, str, n, WNOHANG);
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}
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int
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awaitfor(int pid, char *str, int n)
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{
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return _await(pid, str, n, 0);
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}
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