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/* $OpenBSD: envtest.c,v 1.3 2021/09/01 09:26:32 jasper Exp $ */
/*
* Copyright (c) 2010 Todd C. Miller <millert@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
extern char **environ;
static int
count_instances(const char *name)
{
int count = 0;
size_t namelen;
char **ep;
namelen = strlen(name);
for (ep = environ; *ep != NULL; ep++) {
if (strncmp(name, *ep, namelen) == 0 && (*ep)[namelen] == '=')
count++;
}
return count;
}
static void
fake_env(void)
{
static char *fakenv[7];
fakenv[0] = "HOME=/root";
fakenv[1] = "USER=root";
fakenv[2] = "LOGNAME=root";
fakenv[3] = "SHELL=/bin/sh";
fakenv[4] = "USER=root";
fakenv[5] = NULL;
environ = fakenv;
}
int
main(int argc, char *argv[])
{
char *buf;
int n, failures = 0;
size_t len, bufsize;
fake_env();
n = count_instances("USER");
if (n != 2) {
fprintf(stderr, "initial: %d instances of USER, expected %d\n",
n, 2);
failures++;
}
if (unsetenv("USER") != 0) {
fprintf(stderr, "unsetenv: failed to remove USER\n");
failures++;
}
n = count_instances("USER");
if (n != 0) {
fprintf(stderr, "unsetenv: %d instances of USER, expected %d\n",
n, 0);
failures++;
}
fake_env();
if (setenv("USER", "nobody", 0) != 0) {
fprintf(stderr, "setenv: failed to set USER\n");
failures++;
}
n = count_instances("USER");
if (n != 2) {
fprintf(stderr, "setenv: %d instances of USER, expected %d\n",
n, 2);
failures++;
}
fake_env();
if (setenv("USER", "nobody", 1) != 0) {
fprintf(stderr, "setenv: failed to set USER\n");
failures++;
}
n = count_instances("USER");
if (n != 1) {
fprintf(stderr, "setenv: %d instances of USER, expected %d\n",
n, 1);
failures++;
}
fake_env();
if (putenv("USER=nobody") != 0) {
fprintf(stderr, "putenv: failed to set USER\n");
failures++;
}
n = count_instances("USER");
if (n != 1) {
fprintf(stderr, "putenv: %d instances of USER, expected %d\n",
n, 1);
failures++;
}
return failures;
}
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