Commit | Line | Data |
---|---|---|
252b5132 RH |
1 | /* rename -- rename a file |
2 | This function is in the public domain. */ | |
3 | ||
39423523 DD |
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 | */ | |
252b5132 | 14 | |
1ea16ec5 | 15 | #include "ansidecl.h" |
90aaccd1 JL |
16 | #ifdef HAVE_CONFIG_H |
17 | #include "config.h" | |
18 | #endif | |
252b5132 | 19 | #include <errno.h> |
90aaccd1 JL |
20 | #ifdef HAVE_UNISTD_H |
21 | #include <unistd.h> | |
22 | #endif | |
252b5132 RH |
23 | |
24 | int | |
25 | rename (zfrom, zto) | |
1ea16ec5 DD |
26 | const char *zfrom; |
27 | const char *zto; | |
252b5132 RH |
28 | { |
29 | if (link (zfrom, zto) < 0) | |
30 | { | |
31 | if (errno != EEXIST) | |
32 | return -1; | |
33 | if (unlink (zto) < 0 | |
34 | || link (zfrom, zto) < 0) | |
35 | return -1; | |
36 | } | |
37 | return unlink (zfrom); | |
38 | } |