mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-22 07:03:38 +00:00
86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/* libguestfs - the guestfsd daemon
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* Copyright (C) 2009 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "../src/guestfs_protocol.h"
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#include "daemon.h"
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#include "actions.h"
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char *
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do_checksum (const char *csumtype, const char *path)
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{
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const char *program;
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char *buf;
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char *out, *err;
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int r, len;
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NEED_ROOT (NULL);
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ABS_PATH (path, NULL);
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if (strcasecmp (csumtype, "crc") == 0)
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program = "cksum";
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else if (strcasecmp (csumtype, "md5") == 0)
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program = "md5sum";
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else if (strcasecmp (csumtype, "sha1") == 0)
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program = "sha1sum";
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else if (strcasecmp (csumtype, "sha224") == 0)
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program = "sha224sum";
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else if (strcasecmp (csumtype, "sha256") == 0)
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program = "sha256sum";
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else if (strcasecmp (csumtype, "sha384") == 0)
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program = "sha384sum";
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else if (strcasecmp (csumtype, "sha512") == 0)
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program = "sha512sum";
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else {
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reply_with_error ("unknown checksum type, expecting crc|md5|sha1|sha224|sha256|sha384|sha512");
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return NULL;
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}
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/* Make the path relative to /sysroot. */
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len = strlen (path) + 9;
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buf = malloc (len);
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if (!buf) {
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reply_with_perror ("malloc");
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return NULL;
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}
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snprintf (buf, len, "/sysroot%s", path);
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r = command (&out, &err, program, buf, NULL);
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free (buf);
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if (r == -1) {
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reply_with_error ("%s: %s", program, err);
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free (out);
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free (err);
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return NULL;
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}
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free (err);
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/* Split it at the first whitespace. */
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len = strcspn (out, " \t\n");
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out[len] = '\0';
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return out; /* Caller frees. */
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}
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