mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-17 19:21:04 +00:00
27 lines
769 B
C
27 lines
769 B
C
#define _GNU_SOURCE /* See feature_test_macros(7) */
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <assert.h>
|
|
#include <stdio.h>
|
|
|
|
#define assert_success(e) do { if ((e) < 0) { perror(#e); abort(); } } while (0)
|
|
|
|
void set_env_prefix(char *env, char *sep, char *prefix) {
|
|
char *existing = getenv(env);
|
|
if (existing) {
|
|
char *val;
|
|
assert_success(asprintf(&val, "%s%s%s", prefix, sep, existing));
|
|
assert_success(setenv(env, val, 1));
|
|
free(val);
|
|
} else {
|
|
assert_success(setenv(env, prefix, 1));
|
|
}
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
set_env_prefix("PATH", ":", "/usr/bin/");
|
|
set_env_prefix("PATH", ":", "/usr/local/bin/");
|
|
argv[0] = "/send/me/flags";
|
|
return execv("/send/me/flags", argv);
|
|
}
|