freebsd-dev/crypto/kerberosIV/appl/afsutil/pagsh.c
2000-01-09 08:31:47 +00:00

137 lines
3.5 KiB
C

/*
* Copyright (c) 1995, 1996, 1997, 1998, 1999 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
RCSID("$Id: pagsh.c,v 1.22 1999/12/02 16:58:28 joda Exp $");
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <time.h>
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#include <err.h>
#include <roken.h>
#include <krb.h>
#include <kafs.h>
int
main(int argc, char **argv)
{
int f;
char tf[1024];
char *p;
char *path;
char **args;
int i;
do {
snprintf(tf, sizeof(tf), "%s%u_%u", TKT_ROOT, (unsigned int)getuid(),
(unsigned int)(getpid()*time(0)));
f = open(tf, O_CREAT|O_EXCL|O_RDWR);
} while(f < 0);
close(f);
unlink(tf);
setenv("KRBTKFILE", tf, 1);
i = 0;
args = (char **) malloc((argc + 10)*sizeof(char *));
if (args == NULL)
errx (1, "Out of memory allocating %lu bytes",
(unsigned long)((argc + 10)*sizeof(char *)));
argv++;
if(*argv == NULL) {
path = getenv("SHELL");
if(path == NULL){
struct passwd *pw = k_getpwuid(geteuid());
path = strdup(pw->pw_shell);
}
} else {
if(strcmp(*argv, "-c") == 0) argv++;
path = strdup(*argv++);
}
if (path == NULL)
errx (1, "Out of memory copying path");
p=strrchr(path, '/');
if(p)
args[i] = strdup(p+1);
else
args[i] = strdup(path);
if (args[i++] == NULL)
errx (1, "Out of memory copying arguments");
while(*argv)
args[i++] = *argv++;
args[i++] = NULL;
if(k_hasafs())
k_setpag();
execvp(path, args);
if (errno == ENOENT) {
char **sh_args = malloc ((i + 2) * sizeof(char *));
int j;
if (sh_args == NULL)
errx (1, "Out of memory copying sh arguments");
for (j = 1; j < i; ++j)
sh_args[j + 2] = args[j];
sh_args[0] = "sh";
sh_args[1] = "-c";
sh_args[2] = path;
execv ("/bin/sh", sh_args);
}
perror("execvp");
exit(1);
}