Mercurial > hg > toybox
annotate toys/ln.c @ 562:4d802d438983
Match uint64_t with PRIu64 to avoid warnings on 64 bit builds.
author | Rob Landley <rob@landley.net> |
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date | Sat, 14 Apr 2012 21:27:00 -0500 |
parents | 94a2905dd325 |
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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, "<1nfs", TOYFLAG_BIN)) |
461 | 10 |
11 config LN | |
12 bool "ln" | |
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13 default y |
461 | 14 help |
462
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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 |
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20 -s Create a symbolic link |
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21 -f Force the creation of the link, even if TO already exists |
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22 -n Symlink at destination treated as file |
461 | 23 */ |
24 | |
25 #include "toys.h" | |
26 | |
27 #define FLAG_s 1 | |
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28 #define FLAG_f 2 |
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29 #define FLAG_n 4 |
461 | 30 |
31 void ln_main(void) | |
32 { | |
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33 char *dest = toys.optargs[--toys.optc], *new; |
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34 struct stat buf; |
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35 int i; |
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36 |
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37 // With one argument, create link in current directory. |
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38 if (!toys.optc) { |
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39 toys.optc++; |
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40 dest="."; |
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41 } |
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42 |
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43 // Is destination a directory? |
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44 if (((toys.optflags&FLAG_n) ? lstat : stat)(dest, &buf) |
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45 || !S_ISDIR(buf.st_mode)) |
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46 { |
462
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47 if (toys.optc>1) error_exit("'%s' not a directory"); |
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48 buf.st_mode = 0; |
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49 } |
461 | 50 |
462
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51 for (i=0; i<toys.optc; i++) { |
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52 int rc; |
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53 char *try = toys.optargs[i]; |
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54 |
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55 if (S_ISDIR(buf.st_mode)) { |
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56 new = strrchr(try, '/'); |
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57 if (!new) new = try; |
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58 new = xmsprintf("%s/%s", dest, new); |
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59 } else new = dest; |
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60 /* Silently unlink the existing target. If it doesn't exist, |
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61 * then we just move on */ |
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62 if (toys.optflags & FLAG_f) unlink(new); |
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63 |
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64 rc = (toys.optflags & FLAG_s) ? symlink(try, new) : link(try, new); |
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65 if (rc) |
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66 perror_exit("cannot create %s link from '%s' to '%s'", |
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67 (toys.optflags & FLAG_s) ? "symbolic" : "hard", try, new); |
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68 if (new != dest) free(new); |
461 | 69 } |
70 } |