libmaketmpfilefd3

Usage

#include <netpbm/pm.h>
pm_make_tmpfile(int *         fdP,
                const char ** filenameP);

Examples

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);

Overview

This library function is part of Netpbm(1) .

pm_make_tmpfile_fd() is analogous to pm_make_tmpfile()(1) . The only 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.

Document source

This manual page was generated by the Netpbm tool 'makeman' from HTML source. The master documentation is at

http://netpbm.sourceforge.net/doc/libmaketmpfilefd.html