3 * $Id: chkpath.c,v 1.4 2004/04/08 01:36:22 mdw Exp $
5 * Check a user's file search path
7 * (c) 1999 Mark Wooding
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of chkpath.
14 * chkpath is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * chkpath is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with chkpath; if not, write to the Free Software Foundation,
26 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 /*----- Header files ------------------------------------------------------*/
37 #include <mLib/alloc.h>
38 #include <mLib/mdwopt.h>
39 #include <mLib/quis.h>
40 #include <mLib/report.h>
42 #include "checkpath.h"
44 /*----- Main code ---------------------------------------------------------*/
46 static void report(unsigned what, int verbose,
47 const char *p, const char *msg,
53 static void usage(FILE *fp)
54 { fprintf(fp, "Usage: %s [-vqstp] [PATH...]\n", QUIS); }
56 /* --- @version@ --- */
58 static void version(FILE *fp)
59 { fprintf(fp, "%s version %s\n", QUIS, VERSION); }
63 static void help(FILE *fp)
69 Checks a path string (by default the PATH variable) for security. It\n\
70 ensures that only `root' or the calling user can write to all the parent\n\
71 directories of the path elements, so nobody can maliciously replace the\n\
72 binaries unexpectedly.\n\
74 Options provided are:\n\
76 -h, --help Display this help message.\n\
77 -V, --version Display the program's version number.\n\
78 -u, --usage Show a terse usage summary.\n\
80 -v, --verbose Be verbose about the search progress (cumulative).\n\
81 -q, --quiet Be quiet about the search progress (cumulative).\n\
82 -s, --sticky Consider sticky directories secure against\n\
83 modification by world and group (not recommended).\n\
84 -t, --trust-group Consider other members of your group trustworthy.\n\
85 -p, --print Write the secure path elements to standard output.\n\
90 int main(int argc, char *argv[])
101 /* --- Initialize the world --- */
105 /* --- Set up path scanning defaults --- */
108 cp.cp_what = CP_PROBLEMS | CP_REPORT | CP_SYMLINK;
109 cp.cp_report = report;
111 checkpath_setids(&cp);
113 /* --- Parse the options --- */
116 static struct option opts[] = {
117 { "help", 0, 0, 'h' },
118 { "version", 0, 0, 'V' },
119 { "usage", 0, 0, 'u' },
120 { "verbose", 0, 0, 'v' },
121 { "quiet", 0, 0, 'q' },
122 { "sticky", 0, 0, 's' },
123 { "trust-group", 0, 0, 't' },
124 { "print", 0, 0, 'p' },
127 int i = mdwopt(argc, argv, "hVu" "vqstp", opts, 0, 0, 0);
149 cp.cp_what |= CP_STICKYOK;
152 cp.cp_what = (cp.cp_what & ~CP_WRGRP) | CP_WROTHGRP;
168 /* --- Sort out what needs doing --- */
170 if (optind == argc) {
171 path = getenv("PATH");
177 for (i = optind; i < argc; i++) {
178 p = xstrdup(argv[i]);
181 unsigned b = checkpath(q, &cp);
182 if (!b && (f & f_print)) {
200 /*----- That's all, folks -------------------------------------------------*/