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comparison toys/other/readlink.c @ 708:50d759f8b371

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Remove readlink -m for being poorly defined ("readlink -m /dev/null/and/more" answers what question, exactly?), rewrite xabspath() to work right and not depend on realpath, fix subtle longstanding bug in llist_traverse().
author Rob Landley <rob@landley.net>
date Thu, 22 Nov 2012 21:18:09 -0600
parents 977e19296b3f
children 0027cfa330da
comparison
equal deleted inserted replaced
707:977e19296b3f 708:50d759f8b371
1 /* readlink.c - Return string representation of a symbolic link. 1 /* readlink.c - Return string representation of a symbolic link.
2 * 2 *
3 * Copyright 2007 Rob Landley <rob@landley.net> 3 * Copyright 2007 Rob Landley <rob@landley.net>
4 4
5 USE_READLINK(NEWTOY(readlink, "<1>1femnq[-fem]", TOYFLAG_BIN)) 5 USE_READLINK(NEWTOY(readlink, "<1>1fenq[-fe]", TOYFLAG_BIN))
6 6
7 config READLINK 7 config READLINK
8 bool "readlink" 8 bool "readlink"
9 default n 9 default n
10 help 10 help
12 12
13 With no options, show what symlink points to, return error if not symlink. 13 With no options, show what symlink points to, return error if not symlink.
14 14
15 Options for producing cannonical paths (all symlinks/./.. resolved): 15 Options for producing cannonical paths (all symlinks/./.. resolved):
16 16
17 -e cannonical path to existing file (fail if does not exist) 17 -e cannonical path to existing entry (fail if nothing there)
18 -f cannonical path to creatable file (fail if directory does not exist) 18 -f full path (fail if location does not exist)
19 -m cannonical path
20 -n no trailing newline 19 -n no trailing newline
21 -q quiet (no output, just error code) 20 -q quiet (no output, just error code)
22 */ 21 */
23 22
24 #define FOR_readlink 23 #define FOR_readlink
28 { 27 {
29 char *s; 28 char *s;
30 29
31 // Calculating full cannonical path? 30 // Calculating full cannonical path?
32 31
33 if (toys.optflags & (FLAG_f|FLAG_e|FLAG_m)) { 32 if (toys.optflags & (FLAG_f|FLAG_e))
34 unsigned u = 0; 33 s = xabspath(*toys.optargs, toys.optflags & FLAG_e);
35 34 else s = xreadlink(*toys.optargs);
36 if (toys.optflags & FLAG_f) u++;
37 if (toys.optflags & FLAG_m) u=999999999;
38
39 s = xabspath(*toys.optargs, u);
40 } else s = xreadlink(*toys.optargs);
41 35
42 if (s) { 36 if (s) {
43 if (!(toys.optflags & FLAG_q)) 37 if (!(toys.optflags & FLAG_q))
44 xprintf((toys.optflags & FLAG_n) ? "%s" : "%s\n", s); 38 xprintf((toys.optflags & FLAG_n) ? "%s" : "%s\n", s);
45 if (CFG_TOYBOX_FREE) free(s); 39 if (CFG_TOYBOX_FREE) free(s);