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/* |
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* Copyright 2003 Ned Ludd <solar@gentoo.org> |
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* Copyright 1999-2003 Gentoo Technologies, Inc. |
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* Distributed under the terms of the GNU General Public License v2 |
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* $Header: /home/cvsroot/gentoo-projects/pax-utils/scanelf.c,v 1.4 2003/11/01 08:58:23 solar Exp $ |
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* |
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******************************************************************** |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of the |
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* License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
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* MA 02111-1307, USA. |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <sys/types.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include <sys/stat.h> |
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#include <dirent.h> |
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#include <getopt.h> |
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|
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#include "paxelf.h" |
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|
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static const char *rcsid = |
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"$Id: scanelf.c,v 1.4 2003/11/01 08:58:23 solar Exp $"; |
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|
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#define PARSE_FLAGS "hvlp" |
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static struct option const long_options[] = { |
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{"help", no_argument, 0, 'h'}, |
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{"version", no_argument, 0, 'v'}, |
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{"path", no_argument, 0, 'p'}, |
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{"ldpath", no_argument, 0, 'l'}, |
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{NULL, no_argument, NULL, 0} |
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}; |
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|
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/* scan a directory for ET_EXEC files and print when we find one */ |
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void scanelf(const char *path) |
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{ |
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elfobj *elf = NULL; |
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register DIR *dir; |
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register struct dirent *dentry; |
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|
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if ((chdir(path) == 0) && ((dir = opendir(path)))) { |
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while ((dentry = readdir(dir))) { |
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/* verify this is real ELF */ |
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if ((elf = readelf(dentry->d_name)) != NULL) { |
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if (!check_elf_header(elf->ehdr)) |
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if (IS_ELF(elf)) |
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printf("%s %s %s/%s\n", |
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pax_short_flags(PAX_FLAGS(elf)), |
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get_elfetype(elf->ehdr->e_type), path, |
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dentry->d_name); |
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|
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if (elf != NULL) { |
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munmap(elf->data, elf->len); |
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free(elf); |
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elf = NULL; |
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} |
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} |
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} |
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closedir(dir); |
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} |
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} |
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|
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|
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/* display usage and exit */ |
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void usage(char **argv) |
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{ |
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fprintf(stderr, |
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"Usage: %s [options] dir1 dir2 dirN...\n", |
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(*argv != NULL) ? argv[0] : __FILE__ "\b\b"); |
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} |
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|
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|
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void showopt(int c, char *data) |
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{ |
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int i; |
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for (i = 0; long_options[i].name; i++) |
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if (long_options[i].val == c) |
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fprintf(stderr, " -%c, --%s\t: %s\n", c, long_options[i].name, |
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data); |
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} |
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|
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/* parse command line arguments and preform needed actions */ |
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void parseargs(int argc, char **argv) |
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{ |
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int flag; |
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char *p, *path; |
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FILE *fp; |
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|
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opterr = 0; |
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while ((flag = |
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(int) getopt_long(argc, argv, |
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PARSE_FLAGS, long_options, NULL)) != EOF) { |
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switch (flag) { |
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case 'h': |
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usage(argv); |
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showopt('p', "Scan all directories in PATH environment."); |
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showopt('l', "Scan all directories in /etc/ld.so.conf"); |
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showopt('h', "Print this help and exit."); |
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showopt('v', "Print version and exit."); |
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exit(EXIT_SUCCESS); |
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case 'v': |
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fprintf(stderr, "%s compiled %s\n", __FILE__, __DATE__); |
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fprintf(stderr, |
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"%s written for Gentoo Linux <solar@gentoo.org>\n\t%s\n", |
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(*argv != NULL) ? argv[0] : __FILE__ "\b\b", rcsid); |
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exit(EXIT_SUCCESS); |
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case 'l': |
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/* scan ld.so.conf for ldpath */ |
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if ((fp = fopen("/etc/ld.so.conf", "r")) != NULL) { |
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path = malloc(_POSIX_PATH_MAX); |
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while ((fgets(path, _POSIX_PATH_MAX, fp)) != NULL) { |
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if (*path == '/') { |
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if ((p = strrchr(path, '\r')) != NULL) |
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*p = 0; |
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if ((p = strrchr(path, '\n')) != NULL) |
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*p = 0; |
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scanelf(path); |
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} |
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} |
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free(path); |
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} |
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break; |
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case 'p': |
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if ((path = strdup(getenv("PATH"))) == NULL) { |
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perror("strdup"); |
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exit(EXIT_FAILURE); |
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} |
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/* split string into dirs */ |
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while ((p = strrchr(path, ':')) != NULL) { |
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scanelf(p + 1); |
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*p = 0; |
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} |
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if (path != NULL) |
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free(path); |
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break; |
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case '?': |
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default: |
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break; |
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} |
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} |
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while (optind < argc) |
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scanelf(argv[optind++]); |
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} |
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|
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int main(int argc, char **argv) |
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{ |
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if (argc < 2) { |
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usage(argv); |
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exit(EXIT_FAILURE); |
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} |
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parseargs(argc, argv); |
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return 0; |
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} |
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