127 lines
2.5 KiB
C
127 lines
2.5 KiB
C
/*
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* Copyright (c) 1997,2007 Andrew G. Morgan <morgan@kernel.org>
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*
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* This displays the capabilities of a given file.
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*/
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#undef _XOPEN_SOURCE
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#define _XOPEN_SOURCE 500
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/capability.h>
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#include <ftw.h>
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static int verbose = 0;
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static int recursive = 0;
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static int namespace = 0;
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static void usage(int code)
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{
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fprintf(stderr,
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"usage: getcap [-h] [-l] [-n] [-r] [-v] <filename> [<filename> ...]\n"
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"\n"
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"\tdisplays the capabilities on the queried file(s).\n"
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);
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exit(code);
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}
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static int do_getcap(const char *fname, const struct stat *stbuf,
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int tflag, struct FTW* ftwbuf)
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{
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cap_t cap_d;
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char *result;
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uid_t rootid;
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if (tflag != FTW_F) {
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if (verbose) {
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printf("%s (Not a regular file)\n", fname);
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}
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return 0;
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}
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cap_d = cap_get_file(fname);
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if (cap_d == NULL) {
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if (errno != ENODATA) {
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fprintf(stderr, "Failed to get capabilities of file '%s' (%s)\n",
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fname, strerror(errno));
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} else if (verbose) {
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printf("%s\n", fname);
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}
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return 0;
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}
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result = cap_to_text(cap_d, NULL);
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if (!result) {
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fprintf(stderr,
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"Failed to get capabilities of human readable format at '%s' (%s)\n",
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fname, strerror(errno));
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cap_free(cap_d);
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return 0;
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}
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rootid = cap_get_nsowner(cap_d);
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if (namespace && (rootid+1 > 1)) {
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printf("%s %s [rootid=%d]\n", fname, result, rootid);
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} else {
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printf("%s %s\n", fname, result);
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}
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cap_free(cap_d);
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cap_free(result);
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return 0;
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}
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int main(int argc, char **argv)
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{
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int i, c;
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while ((c = getopt(argc, argv, "rvhnl")) > 0) {
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switch(c) {
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case 'r':
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recursive = 1;
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break;
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case 'v':
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verbose = 1;
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break;
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case 'n':
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namespace = 1;
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break;
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case 'h':
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usage(0);
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case 'l':
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printf("%s has a you choose license: BSD 3-clause or GPL2\n"
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"Copyright (c) 1997,2007 Andrew G. Morgan"
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" <morgan@kernel.org>\n", argv[0]);
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exit(0);
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default:
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usage(1);
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}
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}
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if (!argv[optind])
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usage(1);
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for (i=optind; argv[i] != NULL; i++) {
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struct stat stbuf;
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if (lstat(argv[i], &stbuf) != 0) {
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fprintf(stderr, "%s (%s)\n", argv[i], strerror(errno));
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} else if (recursive) {
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nftw(argv[i], do_getcap, 20, FTW_PHYS);
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} else {
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int tflag = S_ISREG(stbuf.st_mode) ? FTW_F :
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(S_ISLNK(stbuf.st_mode) ? FTW_SL : FTW_NS);
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do_getcap(argv[i], &stbuf, tflag, 0);
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}
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}
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return 0;
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}
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