1 /*
2 * Copyright (c) 1997,2007 Andrew G. Morgan <morgan@kernel.org>
3 *
4 * This displays the capabilities of a given file.
5 */
6
7 #define _XOPEN_SOURCE 500
8
9 #include <errno.h>
10 #include <stdio.h>
11 #include <string.h>
12 #include <stdlib.h>
13 #include <unistd.h>
14 #include <dirent.h>
15 #include <sys/stat.h>
16 #include <sys/types.h>
17 #include <sys/capability.h>
18
19 #include <ftw.h>
20
21 static int verbose = 0;
22 static int recursive = 0;
23
usage(void)24 static void usage(void)
25 {
26 fprintf(stderr,
27 "usage: getcap [-v] [-r] [-h] <filename> [<filename> ...]\n"
28 "\n"
29 "\tdisplays the capabilities on the queried file(s).\n"
30 );
31 exit(1);
32 }
33
do_getcap(const char * fname,const struct stat * stbuf,int tflag,struct FTW * ftwbuf)34 static int do_getcap(const char *fname, const struct stat *stbuf,
35 int tflag, struct FTW* ftwbuf)
36 {
37 cap_t cap_d;
38 char *result;
39
40 if (tflag != FTW_F) {
41 if (verbose) {
42 printf("%s (Not a regular file)\n", fname);
43 }
44 return 0;
45 }
46
47 cap_d = cap_get_file(fname);
48 if (cap_d == NULL) {
49 if (errno != ENODATA) {
50 fprintf(stderr, "Failed to get capabilities of file `%s' (%s)\n",
51 fname, strerror(errno));
52 } else if (verbose) {
53 printf("%s\n", fname);
54 }
55 return 0;
56 }
57
58 result = cap_to_text(cap_d, NULL);
59 if (!result) {
60 fprintf(stderr,
61 "Failed to get capabilities of human readable format at `%s' (%s)\n",
62 fname, strerror(errno));
63 cap_free(cap_d);
64 return 0;
65 }
66 printf("%s %s\n", fname, result);
67 cap_free(cap_d);
68 cap_free(result);
69
70 return 0;
71 }
72
main(int argc,char ** argv)73 int main(int argc, char **argv)
74 {
75 int i, c;
76
77 while ((c = getopt(argc, argv, "rvh")) > 0) {
78 switch(c) {
79 case 'r':
80 recursive = 1;
81 break;
82 case 'v':
83 verbose = 1;
84 break;
85 default:
86 usage();
87 }
88 }
89
90 if (!argv[optind])
91 usage();
92
93 for (i=optind; argv[i] != NULL; i++) {
94 struct stat stbuf;
95
96 if (lstat(argv[i], &stbuf) != 0) {
97 fprintf(stderr, "%s (%s)\n", argv[i], strerror(errno));
98 } else if (recursive) {
99 nftw(argv[i], do_getcap, 20, FTW_PHYS);
100 } else {
101 int tflag = S_ISREG(stbuf.st_mode) ? FTW_F :
102 (S_ISLNK(stbuf.st_mode) ? FTW_SL : FTW_NS);
103 do_getcap(argv[i], &stbuf, tflag, 0);
104 }
105 }
106
107 return 0;
108 }
109