Netpbm subroutine library: pm_make_tmpfile_fd() function(3)  Library Functions Manual  Netpbm subroutine library: pm_make_tmpfile_fd() function(3)

NAME

       pm_make_tmpfile_fd() - create a temporary named file

SYNOPSIS

       #include <netpbm/pm.h>

       pm_make_tmpfile(int *	     fdP,
		       const char ** filenameP);

EXAMPLE

       This  simple example creates a temporary file, writes 'hello world' to it, then writes some search patterns to it, then uses it as input to
       grep:

       #include <netpbm/pm.h>

       int fd;
       const char * myfilename;

       pm_make_tmpfile_fd(&fdP, &myfilename);

       write(fd, '^account:s.*0, 16);
       fprintf(fd, '^name:s.*0, 13);

       close(fd);

       asprintfN(&grepCommand, 'grep --file='%s' /tmp/infile >/tmp/outfile');

       system(grepCommand);

       strfree(grepCommand);

       unlink(myfilename);

       strfree(myfilename);

DESCRIPTION

       This library function is part of Netpbm(1)

       pm_make_tmpfile_fd() is analogous to pm_make_tmpfile()(3) difference is that it opens the file as a low level file, as open() would, rather
       than as a stream, as fopen() would.

       If  you don't need to access the file by name, use pm_tmpfile_fd() instead, because it's cleaner.  With pm_tmpfile_fd(), the operating sys-
       tem always deletes the temporary file when your program exits, if the program failed to clean up after itself.

HISTORY

       pm_tmpfile() was introduced in Netpbm 10.42 (March 2008).

netpbm documentation						 31 December 2007      Netpbm subroutine library: pm_make_tmpfile_fd() function(3)