mktemp(3C) manual page
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mktemp - make a unique file name
#include <stdlib.h>
char *mktemp(char
*template);
Safe
mktemp() replaces the contents of
the string pointed to by template with a unique file name, and returns
template. The string in template should look like a file name with six trailing
Xs; mktemp() will replace the Xs with a character string that can be used
to create a unique file name.
mktemp() will assign to template
the empty string if it cannot create a unique name.
tmpfile(3S)
,
tmpnam(3S)
mktemp() can create only 26 unique file names per thread
for each unique template.
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