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55f400bd84
This is merely updating the Copyright statements from 1997 to 1998.
It's a once a year thing :-).
NO OTHER CHANGES WERE MADE.
Jeremy.
(This used to be commit b9c1697723)
98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
/*
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Unix SMB/Netbios implementation.
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Version 1.9.
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external program running routine
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Copyright (C) Andrew Tridgell 1992-1998
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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/*******************************************************************
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close the low 3 fd's and open dev/null in their place
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********************************************************************/
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static void close_fds(void)
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{
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int fd;
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int i;
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close(0); close(1); close(2);
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/* try and use up these file descriptors, so silly
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library routines writing to stdout etc won't cause havoc */
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for (i=0;i<3;i++) {
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fd = open("/dev/null",O_RDWR,0);
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if (fd < 0) fd = open("/dev/null",O_WRONLY,0);
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if (fd != i) return;
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}
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}
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/*
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This is a wrapper around the system() call to allow commands to run correctly
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as non root from a program which is switching between root and non-root
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It takes 3 arguments as uid,gid,command and runs command after
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becoming a non-root user */
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int main(int argc,char *argv[])
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{
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int uid,gid;
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close_fds();
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if (argc != 4) exit(2);
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uid = atoi(argv[1]);
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gid = atoi(argv[2]);
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/* first become root - we may need to do this in order to lose
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our privilages! */
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#ifdef USE_SETRES
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setresgid(0,0,0);
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setresuid(0,0,0);
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#else
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setuid(0);
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seteuid(0);
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#endif
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#ifdef USE_SETFS
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setfsuid(uid);
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setfsgid(gid);
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#endif
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#ifdef USE_SETRES
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setresgid(gid,gid,gid);
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setresuid(uid,uid,uid);
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#else
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setgid(gid);
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setegid(gid);
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setuid(uid);
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seteuid(uid);
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#endif
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/* paranoia :-) */
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if (getuid() != uid)
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return(3);
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if (geteuid() != getuid())
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return(4);
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/* this is to make sure that the system() call doesn't run forever */
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alarm(30);
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return(system(argv[3]));
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}
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