cosmopolitan/examples/exec.c
2022-04-21 19:56:21 -07:00

33 lines
1.3 KiB
C

#if 0
/*─────────────────────────────────────────────────────────────────╗
│ To the extent possible under law, Justine Tunney has waived │
│ all copyright and related or neighboring rights to this file, │
│ as it is written in the following disclaimers: │
│ • http://unlicense.org/ │
│ • http://creativecommons.org/publicdomain/zero/1.0/ │
╚─────────────────────────────────────────────────────────────────*/
#endif
#include "libc/calls/calls.h"
#include "libc/calls/sigbits.h"
#include "libc/calls/struct/sigset.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/stdio.h"
#include "libc/sysv/consts/sig.h"
STATIC_YOINK("strerror");
int main(int argc, char *argv[]) {
sigset_t ss;
if (argc < 2) {
fputs("USAGE: EXEC.COM PROG [ARGV₀...]\n", stderr);
return 1;
}
// block arbitrary signal so __printargs() looks cooler
sigemptyset(&ss);
sigaddset(&ss, SIGPWR);
sigprocmask(SIG_BLOCK, &ss, 0);
execv(argv[1], argv + 2);
return 127;
}