libmaketmpfilefd(3) [centos man page]

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.*
', 16);
       fprintf(fd, '^name:\s.*
', 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()(1) 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)

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

NAME

       pm_tmpfile() - create a temporary unnamed file

SYNOPSIS

       #include <netpbm/pm.h>

       FILE *
       pm_tmpfile(void);

EXAMPLE

       This simple example creates a temporary file, writes 'hello world' to it, then reads back and prints those contents.

       #include <netpbm/pm.h>

       FILE * myfileP;

       myfile = pm_tmpfile();

       fprintf(myfile, 'hello world0);

       fseek(myfileP, 0, SEEK_SET);

       fread(buffer, sizeof(buffer), 1, myfileP);

       fprintf(STDOUT, 'temp file contains '%s'0, buffer);

       fclose(myfileP);

DESCRIPTION

       This library function is part of Netpbm(1)

       pm_tmpfile()  creates  and  opens  an unnamed temporary file.  It is basically the same thing as the standard C library tmpfile() function,
       except that it uses the TMPFILE environment variable to decide where to create the temporary file.  If TMPFILE is not  set  or  is  set	to
       something unusable (e.g.  too long), pm_tmpfile() falls back to the value of the standard C library symbol P_tmpdir, just like tmpfile().

       Unlike  tmpfile(),  pm_tmpfile()  never returns NULL.  If it fails, it issues a message to Standard Error and aborts the program, like most
       libnetpbm routines do.

       If you need to refer to the temporary file by name, use pm_make_tmpfile() instead.

HISTORY

       pm_tmpfile() was introduced in Netpbm 10.20 (January 2004).

netpbm documentation						   22 July 2004 	       Netpbm subroutine library: pm_tmpfile() function(3)