mirror of
https://git.notmuchmail.org/git/notmuch
synced 2024-11-23 11:28:13 +01:00
111 lines
1.7 KiB
C
111 lines
1.7 KiB
C
/*
|
|
** Copyright 1998 - 2002 Double Precision, Inc. See COPYING for
|
|
** distribution information.
|
|
*/
|
|
|
|
#if HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
#include <sys/types.h>
|
|
#if HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <grp.h>
|
|
#include <pwd.h>
|
|
#include <errno.h>
|
|
|
|
#include "numlib.h"
|
|
|
|
static const char rcsid[]="$Id: changeuidgid.c,v 1.2 2003/01/05 04:01:17 mrsam Exp $";
|
|
|
|
void libmail_changegroup(gid_t gid)
|
|
{
|
|
if ( setgid(gid))
|
|
{
|
|
perror("setgid");
|
|
exit(1);
|
|
}
|
|
|
|
#if HAVE_SETGROUPS
|
|
if ( getuid() == 0 && setgroups(1, &gid) )
|
|
{
|
|
perror("setgroups");
|
|
exit(1);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void libmail_changeuidgid(uid_t uid, gid_t gid)
|
|
{
|
|
libmail_changegroup(gid);
|
|
if ( setuid(uid))
|
|
{
|
|
perror("setuid");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
void libmail_changeusername(const char *uname, const gid_t *forcegrp)
|
|
{
|
|
struct passwd *pw;
|
|
uid_t changeuid;
|
|
gid_t changegid;
|
|
|
|
/* uname might be a pointer returned from a previous called to getpw(),
|
|
** and libc has a problem getting it back.
|
|
*/
|
|
char *p=malloc(strlen(uname)+1);
|
|
|
|
if (!p)
|
|
{
|
|
perror("malloc");
|
|
exit(1);
|
|
}
|
|
strcpy(p, uname);
|
|
|
|
errno=ENOENT;
|
|
if ((pw=getpwnam(p)) == 0)
|
|
{
|
|
free(p);
|
|
perror("getpwnam");
|
|
exit(1);
|
|
}
|
|
free(p);
|
|
|
|
changeuid=pw->pw_uid;
|
|
|
|
if ( !forcegrp ) forcegrp= &pw->pw_gid;
|
|
|
|
changegid= *forcegrp;
|
|
|
|
if ( setgid( changegid ))
|
|
{
|
|
perror("setgid");
|
|
exit(1);
|
|
}
|
|
|
|
#if HAVE_INITGROUPS
|
|
if ( getuid() == 0 && initgroups(pw->pw_name, changegid) )
|
|
{
|
|
perror("initgroups");
|
|
exit(1);
|
|
}
|
|
#else
|
|
#if HAVE_SETGROUPS
|
|
if ( getuid() == 0 && setgroups(1, &changegid) )
|
|
{
|
|
perror("setgroups");
|
|
exit(1);
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
if (setuid(changeuid))
|
|
{
|
|
perror("setuid");
|
|
exit(1);
|
|
}
|
|
}
|