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/* install-check
* Copyright (C) 2002 Manish Singh
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
static void
compare (const char *f1,
const char *f2)
{
struct stat b1, b2;
int status;
pid_t pid, rpid;
if (stat (f2, &b2) || stat (f1, &b1))
return;
if (b1.st_size != b2.st_size)
return;
pid = fork ();
if (pid == 0)
execlp ("cmp", "cmp", "-s", f1, f2, NULL);
else if (pid < 0)
return;
do
rpid = waitpid (pid, &status, 0);
while (rpid == -1 && errno == EINTR);
if (rpid != pid)
status = -1;
if (status != -1 && WIFEXITED (status) && WEXITSTATUS (status) == 0)
exit (0);
}
int
main (int argc,
char **argv)
{
struct stat buf;
char **args;
int i, len;
char *dot, *lastarg, *start;
lastarg = argv[argc - 1];
dot = strrchr (lastarg, '.');
if (dot == NULL)
{
len = strlen (lastarg);
if (len < strlen ("orbit-idl-2"))
goto install;
start = lastarg + len - strlen ("orbit-idl-2");
if (strcmp (start, "orbit-idl-2") != 0)
goto install;
}
else if (dot[1] != 'h' && dot[1] != 'c' && strcmp (dot + 1, "idl") != 0)
goto install;
if ((argc == 4) &&
(strcmp (argv[1], "-c") == 0) &&
(strcmp (argv[2], "-d") != 0) &&
!stat (argv[3], &buf) &&
!S_ISDIR (buf.st_mode))
compare (argv[2], argv[3]);
else if ((argc == 3) &&
(strcmp (argv[1], "-d") != 0) &&
!stat (argv[2], &buf) &&
!S_ISDIR (buf.st_mode))
compare (argv[1], argv[2]);
else if ((argc == 6) &&
(strcmp (argv[1], "-c") == 0) &&
(strcmp (argv[2], "-m") == 0) &&
!stat (argv[5], &buf) &&
!S_ISDIR (buf.st_mode))
compare (argv[4], argv[5]);
else if ((argc == 5) &&
(strcmp (argv[1], "-m") == 0) &&
!stat (argv[4], &buf) &&
!S_ISDIR (buf.st_mode))
compare (argv[3], argv[4]);
install:
args = malloc (sizeof (char *) * (argc + 1));
args[0] = "/usr/bin/install";
for (i = 1; i < argc; i++)
args[i] = argv[i];
args[argc] = NULL;
return execv (args[0], args);
}
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