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Fix (mostly nonsensible) race condition in multi threaded processes using os/execute with os/setenv.

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This commit is contained in:
Andrew Chambers 2020-05-05 16:03:13 +12:00
parent f7b49a2c91
commit a0f351c9fa
1 changed files with 13 additions and 2 deletions
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15
src/core/os.c
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@ -389,15 +389,26 @@ static Janet os_execute(int32_t argc, Janet *argv) {
char *const *cargv = (char *const *)child_argv;
/* Use posix_spawn to spawn new process */
int use_environ = !janet_flag_at(flags, 0);
if (use_environ) {
janet_lock_environ();
}
pid_t pid;
if (janet_flag_at(flags, 1)) {
status = posix_spawnp(&pid,
child_argv[0], NULL, NULL, cargv,
janet_flag_at(flags, 0) ? envp : environ);
use_environ ? environ : envp);
} else {
status = posix_spawn(&pid,
child_argv[0], NULL, NULL, cargv,
janet_flag_at(flags, 0) ? envp : environ);
use_environ ? environ : envp);
}
if (use_environ) {
janet_unlock_environ();
}
/* Wait for child */