TMPFILE Section: Linux Programmer's Manual (3) Updated: April 3, 2025 Index   NAME tmpfile - create a temporary file   SYNOPSIS #include <stdio.h> FILE *tmpfile (void);   DESCRIPTION The tmpfile() function generates a unique temporary filename using the path prefix P_tmpdir defined in <stdio.h>. The temporary file is then opened in binary read/write (w+b) mode. The file will be automatically deleted when it is closed or the program terminates.   RETURN VALUE The tmpfile() function returns a stream descriptor, or NULL if a unique filename cannot be generated or the unique file cannot be opened.   ERRORS EACCES Search permission denied for directory in file's path prefix. EEXIST Unable to generate a unique filename. EMFILE Too many file descriptors in use by process. ENFILE Too many files open in system. EROFS Read-only filesystem.   CONFORMING TO SVID 3, POSIX, BSD 4.3, ISO 9899   SEE ALSO   Index NAME SYNOPSIS DESCRIPTION RETURN VALUE ERRORS CONFORMING TO SEE ALSO This document was created by using the manual pages. Time: 11:58:07 GMT, March 24, 2025