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/* File filext.c
* June 24, 2016
* By Jessica Mink, Harvard-Smithsonian Center for Astrophysics
* Send bug reports to jmink@cfa.harvard.edu
Copyright (C) 2002-2016
Smithsonian Astrophysical Observatory, Cambridge, MA USA
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
static int verbose = 0; /* verbose/debugging flag */
static void usage();
int
main (ac, av)
int ac;
char **av;
{
char *fn;
char *str;
char *ext, *ext2;
/* crack arguments */
for (av++; --ac > 0 && *(str = *av) == '-'; av++) {
char c;
while ((c = *++str))
switch (c) {
case 'v': /* more verbosity */
verbose++;
break;
default:
usage();
break;
}
}
/* There are ac remaining file names starting at av[0] */
if (ac == 0)
usage ();
while (ac-- > 0) {
fn = *av++;
if (verbose)
printf ("%s -> ", fn);
ext = strrchr (fn, '[');
if (ext != NULL) {
ext = ext + 1;
ext2 = strrchr (fn, ']');
if (ext2 != NULL)
*ext2 = (char) 0;
}
else {
ext = strrchr (fn, ',');
if (ext != NULL)
ext = ext + 1;
else {
ext = strrchr (fn, '.');
if (ext != NULL)
ext = ext + 1;
}
}
printf ("%s\n", (ext)?ext:"");
}
return (0);
}
static void
usage ()
{
fprintf (stderr,"FILEXT: Print file name extension\n");
fprintf(stderr,"Usage: filext file1 file2 file3 ...\n");
exit (1);
}
/* Apr 29 2002 New program
*
* Jan 10 2007 Drop unused variables
*
* Jun 24 2016 If no extension, print null string, avoiding seg fault
*/
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