mirror of
https://github.com/fluencelabs/musl
synced 2025-06-08 20:41:35 +00:00
39 lines
705 B
C
39 lines
705 B
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <unistd.h>
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#include "libc.h"
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char *tmpnam(char *s)
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{
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static int lock;
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static int index;
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static char *s2;
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int pid = getpid();
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char *dir = getenv("TMPDIR");
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if (!s) {
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if (!s2) s2 = malloc(L_tmpnam);
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s = s2;
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}
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/* this interface is insecure anyway but at least we can try.. */
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if (!dir || strlen(dir) > L_tmpnam-32)
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dir = P_tmpdir;
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if (access(dir, R_OK|W_OK|X_OK) != 0)
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return NULL;
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LOCK(&lock);
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for (index++; index < TMP_MAX; index++) {
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snprintf(s, L_tmpnam, "%s/temp%d-%d", dir, pid, index);
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if (access(s, F_OK) != 0) {
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UNLOCK(&lock);
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return s;
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}
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}
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UNLOCK(&lock);
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return NULL;
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}
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