fs_get_stats.c revision 88b607994a148f4af5bffee163e39ce8296750c6 
1#include <stdlib.h>
2#include <stdio.h>
3#include <string.h>
4#include <unistd.h>
5
6#include <private/android_filesystem_config.h>
7
8#define DO_DEBUG 1
9
10#define ERROR(fmt,args...) \
11	do { \
12		fprintf(stderr, "%s:%d: ERROR: " fmt,  \
13		        __FILE__, __LINE__, ##args);    \
14	} while (0)
15
16#if DO_DEBUG
17#define DEBUG(fmt,args...) \
18	do { fprintf(stderr, "DEBUG: " fmt, ##args); } while(0)
19#else
20#define DEBUG(x...)               do {} while(0)
21#endif
22
23void
24print_help(void)
25{
26	fprintf(stderr, "fs_get_stats: retrieve the target file stats "
27	        "for the specified file\n");
28	fprintf(stderr, "usage: fs_get_stats cur_perms is_dir filename\n");
29	fprintf(stderr, "\tcur_perms - The current permissions of "
30	        "the file\n");
31	fprintf(stderr, "\tis_dir    - Is filename is a dir, 1. Otherwise, 0.\n");
32	fprintf(stderr, "\tfilename  - The filename to lookup\n");
33	fprintf(stderr, "\n");
34}
35
36int
37main(int argc, const char *argv[])
38{
39	char *endptr;
40	char is_dir = 0;
41	unsigned perms = 0;
42	unsigned uid = (unsigned)-1;
43	unsigned gid = (unsigned)-1;
44
45	if (argc < 4) {
46		ERROR("Invalid arguments\n");
47		print_help();
48		exit(-1);
49	}
50
51	perms = (unsigned)strtoul(argv[1], &endptr, 0);
52	if (!endptr || (endptr == argv[1]) || (*endptr != '\0')) {
53		ERROR("current permissions must be a number. Got '%s'.\n", argv[1]);
54		exit(-1);
55	}
56
57	if (!strcmp(argv[2], "1"))
58		is_dir = 1;
59
60	fs_config(argv[3], is_dir, &uid, &gid, &perms);
61	fprintf(stdout, "%d %d 0%o\n", uid, gid, perms);
62
63	return 0;
64}
65