| 1 | #define _GNU_SOURCE |
| 2 | #include <string.h> |
| 3 | #include <stdlib.h> |
| 4 | #include <errno.h> |
| 5 | #include <sys/stat.h> |
| 6 | |
| 7 | char *mktemp(char *template) |
| 8 | { |
| 9 | size_t l = strlen(template); |
| 10 | int retries = 100; |
| 11 | struct stat st; |
| 12 | |
| 13 | if (l < 6 || memcmp(template+l-6, "XXXXXX", 6)) { |
| 14 | errno = EINVAL; |
| 15 | *template = 0; |
| 16 | return template; |
| 17 | } |
| 18 | |
| 19 | do { |
| 20 | __randname(template+l-6); |
| 21 | if (stat(template, &st)) { |
| 22 | if (errno != ENOENT) *template = 0; |
| 23 | return template; |
| 24 | } |
| 25 | } while (--retries); |
| 26 | |
| 27 | *template = 0; |
| 28 | errno = EEXIST; |
| 29 | return template; |
| 30 | } |