annotate toys/posix/ln.c @ 694:786841fdb1e0

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. The actual code should be the same afterward, this is just cosmetic refactoring.
author Rob Landley <rob@landley.net>
date Tue, 13 Nov 2012 17:14:08 -0600
parents 7e846e281e38
children 1e1abf1113f2
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1 /* ln.c - Create filesystem links
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2 *
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3 * Copyright 2012 Andre Renaud <andre@bluewatersys.com>
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4 *
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5 * See http://opengroup.org/onlinepubs/9699919799/utilities/ln.html
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6
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7 USE_LN(NEWTOY(ln, "<1nfs", TOYFLAG_BIN))
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8
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9 config LN
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10 bool "ln"
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11 default y
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12 help
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13 usage: ln [-sf] [FROM...] TO
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15 Create a link between FROM and TO.
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16 With only one argument, create link in current directory.
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18 -s Create a symbolic link
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19 -f Force the creation of the link, even if TO already exists
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20 -n Symlink at destination treated as file
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21 */
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22
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23 #define FOR_ln
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24 #include "toys.h"
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25
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26 void ln_main(void)
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27 {
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28 char *dest = toys.optargs[--toys.optc], *new;
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29 struct stat buf;
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30 int i;
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32 // With one argument, create link in current directory.
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33 if (!toys.optc) {
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34 toys.optc++;
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35 dest=".";
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36 }
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38 // Is destination a directory?
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39 if (((toys.optflags&FLAG_n) ? lstat : stat)(dest, &buf)
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40 || !S_ISDIR(buf.st_mode))
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41 {
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42 if (toys.optc>1) error_exit("'%s' not a directory");
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43 buf.st_mode = 0;
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44 }
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46 for (i=0; i<toys.optc; i++) {
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47 int rc;
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48 char *try = toys.optargs[i];
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50 if (S_ISDIR(buf.st_mode)) {
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51 new = strrchr(try, '/');
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52 if (!new) new = try;
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53 new = xmsprintf("%s/%s", dest, new);
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54 } else new = dest;
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55 /* Silently unlink the existing target. If it doesn't exist,
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56 * then we just move on */
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57 if (toys.optflags & FLAG_f) unlink(new);
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58
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59 rc = (toys.optflags & FLAG_s) ? symlink(try, new) : link(try, new);
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60 if (rc)
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61 perror_exit("cannot create %s link from '%s' to '%s'",
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62 (toys.optflags & FLAG_s) ? "symbolic" : "hard", try, new);
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63 if (new != dest) free(new);
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64 }
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65 }