pkgwrap.c revision 259065 
1/*
2 * FreeBSD install - a package for the installation and maintenance
3 * of non-core utilities.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * Maxim Sobolev
15 * 8 September 2002
16 *
17 */
18
19#include <sys/cdefs.h>
20__FBSDID("$FreeBSD: releng/10.0/usr.sbin/pkg_install/lib/pkgwrap.c 103149 2002-09-09 19:43:30Z sobomax $");
21
22#include "lib.h"
23#include <ctype.h>
24#include <stdio.h>
25#include <stdlib.h>
26#include <unistd.h>
27
28#undef main
29
30#define SEPARATORS " \t"
31
32extern char **environ;
33
34int
35main(int argc, char **argv)
36{
37    FILE *f;
38    char buffer[FILENAME_MAX], *cp, *verstr;
39    int len;
40
41    if (getenv("PKG_NOWRAP") != NULL)
42	goto nowrap;
43    f = fopen(PKG_WRAPCONF_FNAME, "r");
44    if (f == NULL)
45	goto nowrap;
46    cp = fgets(buffer, 256, f);
47    fclose(f);
48    if (cp == NULL)
49	goto nowrap;
50    len = strlen(cp);
51    if (cp[len - 1] == '\n')
52	cp[len - 1] = '\0';
53    while (strchr(SEPARATORS, *cp) != NULL)
54	cp++;
55    verstr = cp;
56    cp = strpbrk(cp, SEPARATORS);
57    if (cp == NULL)
58	goto nowrap;
59    *cp = '\0';
60    for (cp = verstr; *cp != '\0'; cp++)
61	if (isdigit(*cp) == 0)
62	    goto nowrap;
63    if (atoi(verstr) < PKG_INSTALL_VERSION)
64	goto nowrap;
65    cp++;
66    while (*cp != '\0' && strchr(SEPARATORS, *cp) != NULL)
67	cp++;
68    if (*cp == '\0')
69	goto nowrap;
70    bcopy(cp, buffer, strlen(cp) + 1);
71    cp = strpbrk(buffer, SEPARATORS);
72    if (cp != NULL)
73	*cp = '\0';
74    if (!isdir(buffer))
75	goto nowrap;
76    cp = strrchr(argv[0], '/');
77    if (cp == NULL)
78	cp = argv[0];
79    else
80	cp++;
81    strlcat(buffer, "/", sizeof(buffer));
82    strlcat(buffer, cp, sizeof(buffer));
83    setenv("PKG_NOWRAP", "1", 1);
84    execve(buffer, argv, environ);
85
86nowrap:
87    unsetenv("PKG_NOWRAP");
88    return(real_main(argc, argv));
89}
90