mkstemp
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In computing, mkstemp is a POSIX function for creating a temporary file (a computer file which usually ceases to exist when the program, which opened the file, closes it or terminates).[1]
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[edit] Usage
[edit] Inclusion
- C
#include <stdlib.h> // per IEEE Std 1003.1, 2004 #include <unistd.h> // for "legacy" systems
- C++
#include <cstdlib> // per IEEE Std 1003.1, 2004 #include <unistd.h> // for "legacy" systems
[edit] Declaration
int mkstemp(char* template);
[edit] Requirements
- The parameter
templatemust be a modifiable, null-terminated character array. - The contents of
templatemust be in the format of a valid file path, with six trailing 'X's. - The parameter
templatemust not have been used in a previous invocation ofmkstemp.
[edit] Semantics
- The trailing 'X's in
templateare overwritten to generate a unique file name for the resulting temporary file. - The function reports a valid file descriptor to a temporary file on success; on failure, it reports
-1.
[edit] Error conditions
It is unspecified if mkstemp sets errno, and what values of errno are set, in the event of failure.[1]
