/[gentoo-projects]/pax-utils/scanelf.c
Gentoo

Contents of /pax-utils/scanelf.c

Parent Directory Parent Directory | Revision Log Revision Log


Revision 1.6 - (hide annotations) (download) (as text)
Sat Jan 10 08:20:07 2004 UTC (10 years, 9 months ago) by solar
Branch: MAIN
Changes since 1.5: +30 -18 lines
File MIME type: text/x-csrc
update scanelf

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 1.6 * $Header: /home/cvsroot/gentoo-projects/pax-utils/scanelf.c,v 1.5 2003/11/09 17:46:41 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 1.6 "$Id: scanelf.c,v 1.5 2003/11/09 17:46:41 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 solar 1.6 void scanelf_file(char *filename)
48     {
49     elfobj *elf = NULL;
50     /* verify this is real ELF */
51     if ((elf = readelf(filename)) != NULL) {
52     if (!check_elf_header(elf->ehdr))
53     if (IS_ELF(elf))
54     printf("%s %s %s\n",
55     pax_short_flags(PAX_FLAGS(elf)),
56     get_elfetype(elf->ehdr->e_type), filename);
57    
58     if (elf != NULL) {
59     munmap(elf->data, elf->len);
60     free(elf);
61     elf = NULL;
62     }
63     }
64     }
65    
66 solar 1.1 /* scan a directory for ET_EXEC files and print when we find one */
67     void scanelf(const char *path)
68     {
69     register DIR *dir;
70     register struct dirent *dentry;
71 solar 1.6 char *p;
72     int len = 0;
73 solar 1.1
74 solar 1.4 if ((chdir(path) == 0) && ((dir = opendir(path)))) {
75     while ((dentry = readdir(dir))) {
76 solar 1.6 len = (strlen(path) + 2 + strlen(dentry->d_name));
77     p = malloc(len);
78     strncpy(p, path, len);
79     strncat(p, "/", len);
80     strncat(p, dentry->d_name, len);
81     scanelf_file(p);
82     free(p);
83 solar 1.1 }
84 solar 1.4 closedir(dir);
85 solar 1.1 }
86     }
87    
88    
89     /* display usage and exit */
90 solar 1.5 void usage(char **argv)
91 solar 1.1 {
92 solar 1.3 fprintf(stderr,
93 solar 1.4 "Usage: %s [options] dir1 dir2 dirN...\n",
94     (*argv != NULL) ? argv[0] : __FILE__ "\b\b");
95 solar 1.1 }
96    
97    
98     void showopt(int c, char *data)
99     {
100     int i;
101     for (i = 0; long_options[i].name; i++)
102     if (long_options[i].val == c)
103 solar 1.4 fprintf(stderr, " -%c, --%s\t: %s\n", c, long_options[i].name,
104     data);
105 solar 1.1 }
106    
107     /* parse command line arguments and preform needed actions */
108     void parseargs(int argc, char **argv)
109     {
110     int flag;
111     char *p, *path;
112     FILE *fp;
113    
114     opterr = 0;
115     while ((flag =
116     (int) getopt_long(argc, argv,
117     PARSE_FLAGS, long_options, NULL)) != EOF) {
118     switch (flag) {
119     case 'h':
120 solar 1.5 usage(argv);
121 solar 1.1 showopt('p', "Scan all directories in PATH environment.");
122     showopt('l', "Scan all directories in /etc/ld.so.conf");
123     showopt('h', "Print this help and exit.");
124     showopt('v', "Print version and exit.");
125     exit(EXIT_SUCCESS);
126     case 'v':
127 solar 1.3 fprintf(stderr, "%s compiled %s\n", __FILE__, __DATE__);
128     fprintf(stderr,
129 solar 1.4 "%s written for Gentoo Linux <solar@gentoo.org>\n\t%s\n",
130     (*argv != NULL) ? argv[0] : __FILE__ "\b\b", rcsid);
131 solar 1.1 exit(EXIT_SUCCESS);
132     case 'l':
133     /* scan ld.so.conf for ldpath */
134     if ((fp = fopen("/etc/ld.so.conf", "r")) != NULL) {
135     path = malloc(_POSIX_PATH_MAX);
136     while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) {
137     if (*path == '/') {
138     if ((p = strrchr(path, '\r')) != NULL)
139     *p = 0;
140     if ((p = strrchr(path, '\n')) != NULL)
141     *p = 0;
142 solar 1.2 scanelf(path);
143 solar 1.1 }
144     }
145     free(path);
146     }
147     break;
148     case 'p':
149     if ((path = strdup(getenv("PATH"))) == NULL) {
150     perror("strdup");
151     exit(EXIT_FAILURE);
152     }
153     /* split string into dirs */
154     while ((p = strrchr(path, ':')) != NULL) {
155     scanelf(p + 1);
156     *p = 0;
157     }
158     if (path != NULL)
159     free(path);
160     break;
161     case '?':
162     default:
163     break;
164     }
165     }
166     while (optind < argc)
167     scanelf(argv[optind++]);
168     }
169    
170     int main(int argc, char **argv)
171     {
172 solar 1.5 if (argc < 2) {
173 solar 1.1 usage(argv);
174 solar 1.5 exit(EXIT_FAILURE);
175     }
176 solar 1.1 parseargs(argc, argv);
177     return 0;
178     }

  ViewVC Help
Powered by ViewVC 1.1.20