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Revision 1.5 - (hide annotations) (download) (as text)
Sun Nov 9 17:46:41 2003 UTC (10 years, 10 months ago) by solar
Branch: MAIN
Changes since 1.4: +8 -5 lines
File MIME type: text/x-csrc
paxelf touchup

1 solar 1.1 /*
2     * Copyright 2003 Ned Ludd <solar@gentoo.org>
3     * Copyright 1999-2003 Gentoo Technologies, Inc.
4     * Distributed under the terms of the GNU General Public License v2
5 solar 1.5 * $Header: /home/cvsroot/gentoo-projects/pax-utils/scanelf.c,v 1.4 2003/11/01 08:58:23 solar Exp $
6 solar 1.1 *
7     ********************************************************************
8     * This program is free software; you can redistribute it and/or
9     * modify it under the terms of the GNU General Public License as
10     * published by the Free Software Foundation; either version 2 of the
11     * License, or (at your option) any later version.
12     *
13     * This program is distributed in the hope that it will be useful, but
14     * WITHOUT ANY WARRANTY; without even the implied warranty of
15     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16     * General Public License for more details.
17     *
18     * You should have received a copy of the GNU General Public License
19     * along with this program; if not, write to the Free Software
20     * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
21     * MA 02111-1307, USA.
22     */
23    
24     #include <stdio.h>
25     #include <stdlib.h>
26     #include <sys/types.h>
27     #include <string.h>
28     #include <unistd.h>
29     #include <sys/stat.h>
30     #include <dirent.h>
31     #include <getopt.h>
32    
33     #include "paxelf.h"
34    
35 solar 1.4 static const char *rcsid =
36 solar 1.5 "$Id: scanelf.c,v 1.4 2003/11/01 08:58:23 solar Exp $";
37 solar 1.1
38     #define PARSE_FLAGS "hvlp"
39     static struct option const long_options[] = {
40     {"help", no_argument, 0, 'h'},
41     {"version", no_argument, 0, 'v'},
42     {"path", no_argument, 0, 'p'},
43     {"ldpath", no_argument, 0, 'l'},
44     {NULL, no_argument, NULL, 0}
45     };
46    
47     /* scan a directory for ET_EXEC files and print when we find one */
48     void scanelf(const char *path)
49     {
50     elfobj *elf = NULL;
51     register DIR *dir;
52     register struct dirent *dentry;
53    
54 solar 1.4 if ((chdir(path) == 0) && ((dir = opendir(path)))) {
55     while ((dentry = readdir(dir))) {
56     /* verify this is real ELF */
57     if ((elf = readelf(dentry->d_name)) != NULL) {
58     if (!check_elf_header(elf->ehdr))
59     if (IS_ELF(elf))
60     printf("%s %s %s/%s\n",
61     pax_short_flags(PAX_FLAGS(elf)),
62     get_elfetype(elf->ehdr->e_type), path,
63     dentry->d_name);
64 solar 1.5
65 solar 1.4 if (elf != NULL) {
66     munmap(elf->data, elf->len);
67     free(elf);
68     elf = NULL;
69 solar 1.1 }
70     }
71     }
72 solar 1.4 closedir(dir);
73 solar 1.1 }
74     }
75    
76    
77     /* display usage and exit */
78 solar 1.5 void usage(char **argv)
79 solar 1.1 {
80 solar 1.3 fprintf(stderr,
81 solar 1.4 "Usage: %s [options] dir1 dir2 dirN...\n",
82     (*argv != NULL) ? argv[0] : __FILE__ "\b\b");
83 solar 1.1 }
84    
85    
86     void showopt(int c, char *data)
87     {
88     int i;
89     for (i = 0; long_options[i].name; i++)
90     if (long_options[i].val == c)
91 solar 1.4 fprintf(stderr, " -%c, --%s\t: %s\n", c, long_options[i].name,
92     data);
93 solar 1.1 }
94    
95     /* parse command line arguments and preform needed actions */
96     void parseargs(int argc, char **argv)
97     {
98     int flag;
99     char *p, *path;
100     FILE *fp;
101    
102     opterr = 0;
103     while ((flag =
104     (int) getopt_long(argc, argv,
105     PARSE_FLAGS, long_options, NULL)) != EOF) {
106     switch (flag) {
107     case 'h':
108 solar 1.5 usage(argv);
109 solar 1.1 showopt('p', "Scan all directories in PATH environment.");
110     showopt('l', "Scan all directories in /etc/ld.so.conf");
111     showopt('h', "Print this help and exit.");
112     showopt('v', "Print version and exit.");
113     exit(EXIT_SUCCESS);
114     case 'v':
115 solar 1.3 fprintf(stderr, "%s compiled %s\n", __FILE__, __DATE__);
116     fprintf(stderr,
117 solar 1.4 "%s written for Gentoo Linux <solar@gentoo.org>\n\t%s\n",
118     (*argv != NULL) ? argv[0] : __FILE__ "\b\b", rcsid);
119 solar 1.1 exit(EXIT_SUCCESS);
120     case 'l':
121     /* scan ld.so.conf for ldpath */
122     if ((fp = fopen("/etc/ld.so.conf", "r")) != NULL) {
123     path = malloc(_POSIX_PATH_MAX);
124     while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) {
125     if (*path == '/') {
126     if ((p = strrchr(path, '\r')) != NULL)
127     *p = 0;
128     if ((p = strrchr(path, '\n')) != NULL)
129     *p = 0;
130 solar 1.2 scanelf(path);
131 solar 1.1 }
132     }
133     free(path);
134     }
135     break;
136     case 'p':
137     if ((path = strdup(getenv("PATH"))) == NULL) {
138     perror("strdup");
139     exit(EXIT_FAILURE);
140     }
141     /* split string into dirs */
142     while ((p = strrchr(path, ':')) != NULL) {
143     scanelf(p + 1);
144     *p = 0;
145     }
146     if (path != NULL)
147     free(path);
148     break;
149     case '?':
150     default:
151     break;
152     }
153     }
154     while (optind < argc)
155     scanelf(argv[optind++]);
156     }
157    
158     int main(int argc, char **argv)
159     {
160 solar 1.5 if (argc < 2) {
161 solar 1.1 usage(argv);
162 solar 1.5 exit(EXIT_FAILURE);
163     }
164 solar 1.1 parseargs(argc, argv);
165     return 0;
166     }

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