35 lines
714 B
C
Executable file
35 lines
714 B
C
Executable file
/* mktemp - make a name for a temporary file */
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#include <lib.h>
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#define access _access
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#define getpid _getpid
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#define mktemp _mktemp
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#include <unistd.h>
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PUBLIC char *mktemp(template)
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char *template;
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{
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register int k;
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register char *p;
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register pid_t pid;
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pid = getpid(); /* get process id as semi-unique number */
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p = template;
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while (*p != 0) p++; /* find end of string */
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/* Replace XXXXXX at end of template with a letter, then as many of the
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* trailing digits of the pid as fit.
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*/
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while (*--p == 'X') {
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*p = '0' + (pid % 10);
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pid /= 10;
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}
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if (*++p != 0) {
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for (k = 'a'; k <= 'z'; k++) {
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*p = k;
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if (access(template, F_OK) < 0) return(template);
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}
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}
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return("/");
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}
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