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elks-enhanced

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Owner: themasterBranch: masterCommits: 6893Updated: 2026-04-19 00:15

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elks-enhanced / libc / misc / mktemp.c

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/*
 * (C) Shane Kerr <kerr@wizard.net> under terms of LGPL
 */

#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <sys/stat.h>
#include <errno.h>

char *mktemp(char *s)
{
    char * ptr;
    static char c1 = 0;
    static char c2 = 0;
    static char uniq_ch[] =
	 "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    size_t len;

    if (!s || (len = strlen(s)) < 6) {
        errno = EINVAL;
        return 0;
    }
    ptr = s + len - 6;
    if (++c1 >= 62) {
	c1 = 0;
	if (++c2 >= 62) {
	    errno = EEXIST;
	    return 0;
	}
    }
    sprintf(ptr, "%04d%c%c", getpid(), uniq_ch[(int)c1], uniq_ch[(int)c2]);

    return s;
}

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