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/* guestfish - guest filesystem shell
* Copyright (C) 2009-2016 Red Hat Inc.
*
* 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.
*/
/**
* This file implements the guestfish C<more> command.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <inttypes.h>
#include <libintl.h>
#include "fish.h"
int
run_more (const char *cmd, size_t argc, char *argv[])
{
CLEANUP_FREE char *tmpdir = guestfs_get_tmpdir (g);
CLEANUP_UNLINK_FREE char *filename = NULL;
char buf[256];
CLEANUP_FREE char *remote = NULL;
const char *pager;
int r, fd;
if (argc != 1) {
fprintf (stderr, _("use '%s filename' to page a file\n"), cmd);
return -1;
}
/* Choose a pager. */
if (STRCASEEQ (cmd, "less"))
pager = "less";
else {
pager = getenv ("PAGER");
if (pager == NULL)
pager = "more";
}
/* Allow win:... prefix on remote. */
remote = win_prefix (argv[0]);
if (remote == NULL)
return -1;
/* Download the file and write it to a temporary. */
if (asprintf (&filename, "%s/guestfishXXXXXX", tmpdir) == -1) {
perror ("asprintf");
return -1;
}
fd = mkstemp (filename);
if (fd == -1) {
perror ("mkstemp");
return -1;
}
snprintf (buf, sizeof buf, "/dev/fd/%d", fd);
if (guestfs_download (g, remote, buf) == -1) {
close (fd);
return -1;
}
if (close (fd) == -1) {
perror (filename);
return -1;
}
/* View it. */
/* XXX Safe? */
snprintf (buf, sizeof buf, "%s %s", pager, filename);
r = system (buf);
if (r != 0) {
perror (buf);
return -1;
}
return 0;
}
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