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Commit | Line | Data |
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28e9041c | 1 | /* rename -- rename a file |
2 | This function is in the public domain. */ | |
3 | ||
614a23c6 | 4 | /* |
5 | ||
6 | @deftypefn Supplemental int rename (const char *@var{old}, const char *@var{new}) | |
7 | ||
8 | Renames a file from @var{old} to @var{new}. If @var{new} already | |
9 | exists, it is removed. | |
10 | ||
11 | @end deftypefn | |
12 | ||
13 | */ | |
28e9041c | 14 | |
ca3ccdf6 | 15 | #include "ansidecl.h" |
a1d4f79a | 16 | #ifdef HAVE_CONFIG_H |
17 | #include "config.h" | |
18 | #endif | |
28e9041c | 19 | #include <errno.h> |
a1d4f79a | 20 | #ifdef HAVE_UNISTD_H |
21 | #include <unistd.h> | |
22 | #endif | |
28e9041c | 23 | |
24 | int | |
f8d9d6a0 | 25 | rename (const char *zfrom, const char *zto) |
28e9041c | 26 | { |
27 | if (link (zfrom, zto) < 0) | |
28 | { | |
29 | if (errno != EEXIST) | |
30 | return -1; | |
31 | if (unlink (zto) < 0 | |
32 | || link (zfrom, zto) < 0) | |
33 | return -1; | |
34 | } | |
35 | return unlink (zfrom); | |
36 | } |