Netpbm subroutine librNetpbmmsubroutineilibrary:cpm_make_tmpfile()function(3)NAMEpm_make_tmpfile() - create a temporary named file
SYNOPSIS
#include <netpbm/pm.h>
pm_make_tmpfile(FILE ** fileP,
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>
FILE * myfileP;
const char * myfilename;
pm_make_tmpfile(&myfileP, &myfilename);
fprintf(myfile, '^account:\s.*0);
fprintf(myfile, '^name:\s.*0);
fclose(myFileP);
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() creates and opens a temporary file, returning to you
a stream file handle for it and its name.
pm_make_tmpfile() chooses a file name that is not already in use, with
proper interlocking to make sure that it actually creates a file and
opens the new file, as opposed to merely opening an existing file.
If you don't need to access the file by name, use pm_tmpfile() instead,
because it's cleaner. With pm_tmpfile(), the operating system always
deletes the temporary file when your program exits, if the program
failed to clean up after itself.
The temporary file goes in the directory named by the TMPFILE environ‐
ment variable. 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 (like the standard C library's tmpfile()).
The name of the file within that directory is like myprog_blrfx, where
myprog is the name of your program (arg 0) and the rest is an arbitrary
discriminator.
If pm_make_tmpfile() is unable to create a temporary file, it issues a
message to Standard Error and aborts the program.
HISTORYpm_tmpfile() was introduced in Netpbm 10.27 (March 2005).
netpbm documentation Netpbm subroutineblibrary: pm_make_tmpfile()function(3)
