1 /* readlink.c - Return string representation of a symbolic link.
2 *
3 * Copyright 2007 Rob Landley <rob@landley.net>
4
5 USE_READLINK(NEWTOY(readlink, "<1nqmef(canonicalize)[-mef]", TOYFLAG_USR|TOYFLAG_BIN))
6 USE_REALPATH(NEWTOY(realpath, "<1", TOYFLAG_USR|TOYFLAG_BIN))
7
8 config READLINK
9 bool "readlink"
10 default y
11 help
12 usage: readlink FILE...
13
14 With no options, show what symlink points to, return error if not symlink.
15
16 Options for producing canonical paths (all symlinks/./.. resolved):
17
18 -e Canonical path to existing entry (fail if missing)
19 -f Full path (fail if directory missing)
20 -m Ignore missing entries, show where it would be
21 -n No trailing newline
22 -q Quiet (no output, just error code)
23
24 config REALPATH
25 bool "realpath"
26 default y
27 help
28 usage: realpath FILE...
29
30 Display the canonical absolute pathname
31 */
32
33 #define FOR_readlink
34 #define FORCE_FLAGS
35 #include "toys.h"
36
readlink_main(void)37 void readlink_main(void)
38 {
39 char **arg, *s;
40
41 for (arg = toys.optargs; *arg; arg++) {
42 // Calculating full canonical path?
43 // Take advantage of flag positions to calculate m = -1, f = 0, e = 1
44 if (toys.optflags & (FLAG_f|FLAG_e|FLAG_m))
45 s = xabspath(*arg, (toys.optflags&(FLAG_f|FLAG_e))-1);
46 else s = xreadlink(*arg);
47
48 if (s) {
49 if (!FLAG(q)) xprintf(FLAG(n) ? "%s" : "%s\n", s);
50 if (CFG_TOYBOX_FREE) free(s);
51 } else toys.exitval = 1;
52 }
53 }
54
realpath_main(void)55 void realpath_main(void)
56 {
57 toys.optflags = FLAG_f;
58 readlink_main();
59 }
60