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90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
#if 0
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/*─────────────────────────────────────────────────────────────────╗
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│ To the extent possible under law, Justine Tunney has waived │
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│ all copyright and related or neighboring rights to this file, │
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│ as it is written in the following disclaimers: │
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│ • http://unlicense.org/ │
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│ • http://creativecommons.org/publicdomain/zero/1.0/ │
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╚─────────────────────────────────────────────────────────────────*/
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#endif
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#include "libc/calls/struct/rusage.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/rusage.h"
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#include "libc/calls/struct/sigaction.h"
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#include "libc/calls/struct/sigset.h"
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#include "libc/calls/struct/timespec.h"
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#include "libc/fmt/itoa.h"
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#include "libc/log/appendresourcereport.internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/stdio/append.h"
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#include "libc/stdio/stdio.h"
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#include "libc/sysv/consts/sig.h"
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int main(int argc, char *argv[]) {
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const char *prog = argv[0];
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if (!prog) prog = "rusage";
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if (argc < 2) {
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tinyprint(2, prog, ": missing command\n", NULL);
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exit(1);
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}
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// block process management signals
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sigset_t mask, orig;
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sigemptyset(&mask);
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sigaddset(&mask, SIGINT);
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sigaddset(&mask, SIGQUIT);
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sigaddset(&mask, SIGCHLD);
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sigprocmask(SIG_BLOCK, &mask, &orig);
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struct timespec started = timespec_real();
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// launch subprocess
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int child = fork();
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if (child == -1) {
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perror(prog);
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exit(1);
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}
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if (!child) {
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sigprocmask(SIG_SETMASK, &orig, 0);
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execvp(argv[1], argv + 1);
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_Exit(127);
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}
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// wait for subprocess
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int ws;
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struct rusage ru;
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struct sigaction ignore;
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ignore.sa_flags = 0;
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ignore.sa_handler = SIG_IGN;
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sigemptyset(&ignore.sa_mask);
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sigaction(SIGINT, &ignore, 0);
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sigaction(SIGQUIT, &ignore, 0);
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if (wait4(child, &ws, 0, &ru) == -1) {
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perror(prog);
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exit(1);
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}
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// compute wall time
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char strmicros[27];
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struct timespec ended = timespec_real();
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struct timespec elapsed = timespec_sub(ended, started);
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FormatInt64Thousands(strmicros, timespec_tomicros(elapsed));
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// show report
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char *b = 0;
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appends(&b, "took ");
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appends(&b, strmicros);
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appends(&b, "µs wall time\n");
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AppendResourceReport(&b, &ru, "\n");
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write(2, b, appendz(b).i);
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// propagate status
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if (WIFSIGNALED(ws)) {
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signal(WTERMSIG(ws), SIG_DFL);
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raise(WTERMSIG(ws));
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}
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return WEXITSTATUS(ws);
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}
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