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annotate 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
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* readlink.c - Return string representation of a symbolic link.
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2 *
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3 * Copyright 2007 Rob Landley <rob@landley.net>
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4
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5 USE_READLINK(NEWTOY(readlink, "<1>1fenq[-fe]", TOYFLAG_BIN))
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6
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7 config READLINK
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8 bool "readlink"
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9 default n
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10 help
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11 usage: readlink FILE
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13 With no options, show what symlink points to, return error if not symlink.
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14
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15 Options for producing cannonical paths (all symlinks/./.. resolved):
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16
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17 -e cannonical path to existing entry (fail if nothing there)
50d759f8b371 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().
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18 -f full path (fail if location does not exist)
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19 -n no trailing newline
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20 -q quiet (no output, just error code)
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21 */
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23 #define FOR_readlink
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24 #include "toys.h"
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25
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26 void readlink_main(void)
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27 {
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28 char *s;
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30 // Calculating full cannonical path?
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31
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32 if (toys.optflags & (FLAG_f|FLAG_e))
50d759f8b371 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().
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33 s = xabspath(*toys.optargs, toys.optflags & FLAG_e);
50d759f8b371 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().
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parents: 707
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34 else s = xreadlink(*toys.optargs);
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35
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786841fdb1e0 Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
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parents: 656
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36 if (s) {
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37 if (!(toys.optflags & FLAG_q))
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38 xprintf((toys.optflags & FLAG_n) ? "%s" : "%s\n", s);
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786841fdb1e0 Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
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parents: 656
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39 if (CFG_TOYBOX_FREE) free(s);
786841fdb1e0 Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
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parents: 656
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40 } else toys.exitval = 1;
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41 }