| 1 | #include <stdio.h> |
| 2 | |
| 3 | #ifndef L_tmpnam |
| 4 | #define L_tmpname 100 |
| 5 | #endif |
| 6 | #ifndef P_tmpdir |
| 7 | #define P_tmpdir "/usr/tmp" |
| 8 | #endif |
| 9 | |
| 10 | static char tmpnam_buffer[L_tmpnam]; |
| 11 | static int tmpnam_counter; |
| 12 | |
| 13 | extern int getpid (); |
| 14 | |
| 15 | char * |
| 16 | tmpnam (s) |
| 17 | char *s; |
| 18 | { |
| 19 | int pid = getpid (); |
| 20 | |
| 21 | if (s == NULL) |
| 22 | s = tmpnam_buffer; |
| 23 | |
| 24 | /* Generate the filename and make sure that there isn't one called |
| 25 | it already. */ |
| 26 | |
| 27 | while (1) |
| 28 | { |
| 29 | FILE *f; |
| 30 | sprintf (s, "%s/%s%x.%x", P_tmpdir, "t", pid, tmpnam_counter); |
| 31 | f = fopen (s, "r"); |
| 32 | if (f == NULL) |
| 33 | break; |
| 34 | tmpnam_counter++; |
| 35 | fclose (f); |
| 36 | } |
| 37 | |
| 38 | return s; |
| 39 | } |