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/* libguestfs - the guestfsd daemon
* Copyright (C) 2009 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "../src/guestfs_protocol.h"
#include "daemon.h"
#include "actions.h"
char *
do_checksum (char *csumtype, char *path)
{
const char *program;
char *buf;
char *out, *err;
int r;
int len;
NEED_ROOT (NULL);
ABS_PATH (path, NULL);
if (strcasecmp (csumtype, "crc") == 0)
program = "cksum";
else if (strcasecmp (csumtype, "md5") == 0)
program = "md5sum";
else if (strcasecmp (csumtype, "sha1") == 0)
program = "sha1sum";
else if (strcasecmp (csumtype, "sha224") == 0)
program = "sha224sum";
else if (strcasecmp (csumtype, "sha256") == 0)
program = "sha256sum";
else if (strcasecmp (csumtype, "sha384") == 0)
program = "sha384sum";
else if (strcasecmp (csumtype, "sha512") == 0)
program = "sha512sum";
else {
reply_with_error ("unknown checksum type, expecting crc|md5|sha1|sha224|sha256|sha384|sha512");
return NULL;
}
/* Make the path relative to /sysroot. */
buf = sysroot_path (path);
if (!buf) {
reply_with_perror ("malloc");
return NULL;
}
r = command (&out, &err, program, buf, NULL);
free (buf);
if (r == -1) {
reply_with_error ("%s: %s", program, err);
free (out);
free (err);
return NULL;
}
free (err);
/* Split it at the first whitespace. */
len = strcspn (out, " \t\n");
out[len] = '\0';
return out; /* Caller frees. */
}
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