mktemp – make a unique file name|
char* mktemp(char *template)
Mktemp replaces template by a unique file name, and returns the
address of the template. The template should look like a file
name with eleven trailing Xs. The Xs are replaced by a letter
followed by the current process id. Letters from a to z are tried
until a name that can be accessed (see access(2)) is generated.
no such name can be generated, mktemp returns "/" .|