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/*
* (C) Shane Kerr <kerr@wizard.net> under terms of LGPL
*/
#include <unistd.h>
#include <sys/stat.h>
#include <errno.h>
#ifndef P_tmpdir
#define P_tmpdir "/tmp"
#endif
#ifndef L_tmpnam
#define L_tmpnam 20
#endif
char *tmpnam(s)
char *s;
{
static char ret_val[L_tmpnam];
static char c1 = 0;
static char c2 = 0;
static char c3 = 0;
static char uniq_ch[] =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
struct stat stbuf;
do {
sprintf(ret_val, "%s/%05d%c%c%c", P_tmpdir, getpid(),
uniq_ch[c1], uniq_ch[c2], uniq_ch[c3]);
if (++c1 >= 62) {
c1 = 0;
if (++c2 >= 62) {
c2 = 0;
if (++c3 >= 62) {
errno = EEXIST;
return 0;
}
}
}
} while (stat(ret_val, &stbuf) == 0);
if (s != 0) {
strcpy(s, ret_val);
return s;
} else {
return ret_val;
}
}
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