Mercurial > hg > toybox
annotate toys/ln.c @ 462:3947b397c328
Teach ln about multiple arguments.
author | Rob Landley <rob@landley.net> |
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date | Mon, 13 Feb 2012 23:43:33 -0600 |
parents | ca74293f87f1 |
children | 94a2905dd325 |
rev | line source |
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461 | 1 /* vi: set sw=4 ts=4: |
2 * | |
3 * ln.c - Create filesystem links | |
4 * | |
5 * Copyright 2012 Andre Renaud <andre@bluewatersys.com> | |
6 * | |
7 * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ln.html | |
8 | |
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9 USE_LN(NEWTOY(ln, "<1fs", TOYFLAG_BIN)) |
461 | 10 |
11 config LN | |
12 bool "ln" | |
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13 default y |
461 | 14 help |
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15 usage: ln [-sf] [FROM...] TO |
461 | 16 |
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17 Create a link between FROM and TO. |
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18 With only one argument, create link in current directory. |
461 | 19 |
20 -s Create a symbolic link | |
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21 -f Force the creation of the link, even if TO already exists |
461 | 22 */ |
23 | |
24 #include "toys.h" | |
25 | |
26 #define FLAG_s 1 | |
27 #define FLAG_f 2 | |
28 | |
29 void ln_main(void) | |
30 { | |
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31 char *dest = toys.optargs[--toys.optc], *new; |
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32 struct stat buf; |
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33 int i; |
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34 |
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35 // With one argument, create link in current directory. |
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36 if (!toys.optc) { |
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37 toys.optc++; |
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38 dest="."; |
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39 } |
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40 |
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41 // Is destination a directory? |
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42 if (stat(dest, &buf) || !S_ISDIR(buf.st_mode)) { |
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43 if (toys.optc>1) error_exit("'%s' not a directory"); |
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44 buf.st_mode = 0; |
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45 } |
461 | 46 |
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47 for (i=0; i<toys.optc; i++) { |
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48 int rc; |
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49 char *try = toys.optargs[i]; |
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50 |
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51 if (S_ISDIR(buf.st_mode)) { |
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52 new = strrchr(try, '/'); |
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53 if (!new) new = try; |
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54 new = xmsprintf("%s/%s", dest, new); |
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55 } else new = dest; |
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56 /* Silently unlink the existing target. If it doesn't exist, |
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57 * then we just move on */ |
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58 if (toys.optflags & FLAG_f) unlink(new); |
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59 |
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60 |
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61 rc = (toys.optflags & FLAG_s) ? symlink(try, new) : link(try, new); |
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62 if (rc) |
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63 perror_exit("cannot create %s link from '%s' to '%s'", |
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64 (toys.optflags & FLAG_s) ? "symbolic" : "hard", try, new); |
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65 if (new != dest) free(new); |
461 | 66 } |
67 } |