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/*
* Copyright Red Hat Inc. 2008
*
* Author: Steve Olivieri <sjo@redhat.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2.1 of the GNU Lesser General Public License
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <pwd.h>
#include <grp.h>
#include <errno.h>
#include <string.h>
/*
* This is just a simple program for changing a UID or a GID. Comment out
* whichever block you don't want to use.
*/
int main(int argc, char *argv[])
{
/* User data */
struct passwd *pwd;
/* UID of user */
uid_t uid;
/* Group data */
struct group *grp;
/* GID of group */
gid_t gid;
/* Return codes */
int ret;
if (argc < 2) {
printf("Usage: %s <uid_value> \n", argv[0]);
goto finished;
}
pwd = getpwnam(argv[1]);
uid = pwd->pw_uid;
fprintf(stdout, "Setting UID to %s (%d).\n", pwd->pw_name, uid);
if ((ret = setuid(uid))) {
fprintf(stderr, "Call to setuid() failed with error: %s\n",
strerror(errno));
ret = -errno;
goto finished;
}
// while(1) {
// grp = getgrnam("root");
// gid = grp->gr_gid;
// fprintf(stdout, "Setting GID to %s (%d).\n",
// grp->gr_name, gid);
// if ((ret = setgid(gid))) {
// fprintf(stderr, "Call to setgid() failed with error:"
// " %s\n", strerror(errno));
// ret = -errno;
// goto finished;
// }
// }
while (1) {
usleep(3000000);
}
finished:
return ret;
}
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