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libmaketmpfilefd

 

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.*\n', 16);
 fprintf(fd, '^name:\\s.*\n', 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).Theonly 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 system 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).