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// SPDX-License-Identifier: MIT
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libHX/defs.h>
#include <libHX/option.h>
#include <libHX/proc.h>
#if defined(HAVE_INITGROUPS)
static char *user_name, *group_name;
static const struct HXoption options_table[] = {
{.sh = 'u', .type = HXTYPE_STRING, .ptr = &user_name},
{.sh = 'g', .type = HXTYPE_STRING, .ptr= &group_name},
HXOPT_TABLEEND,
};
static int runner(int argc, const char **argv)
{
HX_getopt(options_table, &argc, &argv, HXOPT_USAGEONERR);
const char *user = user_name != NULL ? user_name : "-";
const char *group = group_name != NULL ? group_name : "-";
switch (HXproc_switch_user(user_name, group_name)) {
case HXPROC_USER_NOT_FOUND:
if (user_name == NULL)
return EXIT_FAILURE; /* impossible outcomes */
printf("No such user \"%s\": %s\n", user_name, strerror(errno));
break;
case HXPROC_GROUP_NOT_FOUND:
if (group_name == NULL || *group_name == '\0')
return EXIT_FAILURE; /* impossible outcome */
printf("No such group \"%s\": %s\n", group_name, strerror(errno));
break;
case HXPROC_SETUID_FAILED:
printf("setuid %s: %s\n", user, strerror(errno));
break;
case HXPROC_SETGID_FAILED:
printf("setgid %s: %s\n", group, strerror(errno));
break;
case HXPROC_INITGROUPS_FAILED:
printf("initgroups for %s: %s\n", user, strerror(errno));
break;
case HXPROC_SU_NOOP:
printf("No action was performed./User identity already reached.\n");
/* fallthrough */
case HXPROC_SU_SUCCESS: {
gid_t list[64] = {-1};
int numgroups = getgroups(ARRAY_SIZE(list), list);
printf("Identity now: uid %lu euid %lu gid %lu egid %lu\n",
static_cast(unsigned long, getuid()),
static_cast(unsigned long, geteuid()),
static_cast(unsigned long, getgid()),
static_cast(unsigned long, getegid()));
printf("Secondary groups:");
for (int i = 0; i < numgroups; ++i)
printf(" %lu", static_cast(unsigned long, list[i]));
printf("\n");
break;
}
}
return EXIT_SUCCESS;
}
int main(int argc, const char **argv)
{
int ret = runner(argc, argv);
if (ret != EXIT_SUCCESS)
fprintf(stderr, "FAILED\n");
return ret;
}
#else
int main(void)
{
return EXIT_SUCCESS;
}
#endif
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