X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=daemon%2Fchecksum.c;h=ca5abe76ef89bad22282e5657a99492cde92a847;hp=c06a697dfb5e900264c9860308ac8dee2582658f;hb=HEAD;hpb=6bda071b5cd8393b37653687027c4ae6c6cf3804

diff --git a/daemon/checksum.c b/daemon/checksum.c
index c06a697..ca5abe7 100644
--- a/daemon/checksum.c
+++ b/daemon/checksum.c
@@ -1,5 +1,5 @@
 /* libguestfs - the guestfsd daemon
- * Copyright (C) 2009 Red Hat Inc.
+ * Copyright (C) 2009-2011 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
@@ -13,7 +13,7 @@
  *
  * 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.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 #include <config.h>
@@ -22,52 +22,56 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
 
-#include "../src/guestfs_protocol.h"
+#include "guestfs_protocol.h"
 #include "daemon.h"
 #include "actions.h"
 
-char *
-do_checksum (char *csumtype, char *path)
+static const char *
+program_of_csum (const char *csumtype)
 {
-  const char *program;
-  char *buf;
-  char *out, *err;
-  int r;
-  int len;
-
-  NEED_ROOT (return NULL);
-  ABS_PATH (path, return 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";
+  if (STRCASEEQ (csumtype, "crc"))
+    return "cksum";
+  else if (STRCASEEQ (csumtype, "md5"))
+    return "md5sum";
+  else if (STRCASEEQ (csumtype, "sha1"))
+    return "sha1sum";
+  else if (STRCASEEQ (csumtype, "sha224"))
+    return "sha224sum";
+  else if (STRCASEEQ (csumtype, "sha256"))
+    return "sha256sum";
+  else if (STRCASEEQ (csumtype, "sha384"))
+    return "sha384sum";
+  else if (STRCASEEQ (csumtype, "sha512"))
+    return "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");
+static char *
+checksum (const char *csumtype, int fd)
+{
+  const char *program;
+  char *out, *err;
+  int flags, r;
+  int len;
+
+  program = program_of_csum (csumtype);
+  if (program == NULL) {
+    close (fd);
     return NULL;
   }
 
-  r = command (&out, &err, program, buf, NULL);
-  free (buf);
+  pulse_mode_start ();
+
+  flags = COMMAND_FLAG_CHROOT_COPY_FILE_TO_STDIN | fd;
+  r = commandf (&out, &err, flags, program, NULL);
   if (r == -1) {
+    pulse_mode_cancel ();
     reply_with_error ("%s: %s", program, err);
     free (out);
     free (err);
@@ -80,5 +84,121 @@ do_checksum (char *csumtype, char *path)
   len = strcspn (out, " \t\n");
   out[len] = '\0';
 
+  pulse_mode_end ();
+
   return out;			/* Caller frees. */
 }
+
+char *
+do_checksum (const char *csumtype, const char *path)
+{
+  int fd;
+
+  CHROOT_IN;
+  fd = open (path, O_RDONLY);
+  CHROOT_OUT;
+
+  if (fd == -1) {
+    reply_with_perror ("%s", path);
+    return NULL;
+  }
+
+  return checksum (csumtype, fd);
+}
+
+char *
+do_checksum_device (const char *csumtype, const char *device)
+{
+  int fd;
+
+  fd = open (device, O_RDONLY);
+  if (fd == -1) {
+    reply_with_perror ("%s", device);
+    return NULL;
+  }
+
+  return checksum (csumtype, fd);
+}
+
+/* Has one FileOut parameter. */
+int
+do_checksums_out (const char *csumtype, const char *dir)
+{
+  struct stat statbuf;
+  int r;
+
+  const char *program = program_of_csum (csumtype);
+  if (program == NULL)
+    return -1;
+
+  char *sysrootdir = sysroot_path (dir);
+  if (!sysrootdir) {
+    reply_with_perror ("malloc");
+    return -1;
+  }
+
+  r = stat (sysrootdir, &statbuf);
+  if (r == -1) {
+    reply_with_perror ("%s", dir);
+    free (sysrootdir);
+    return -1;
+  }
+  if (!S_ISDIR (statbuf.st_mode)) {
+    reply_with_error ("%s: not a directory", dir);
+    free (sysrootdir);
+    return -1;
+  }
+
+  char *cmd;
+  if (asprintf_nowarn (&cmd, "cd %Q && find -type f -print0 | xargs -0 %s",
+                       sysrootdir, program) == -1) {
+    reply_with_perror ("asprintf");
+    free (sysrootdir);
+    return -1;
+  }
+  free (sysrootdir);
+
+  if (verbose)
+    fprintf (stderr, "%s\n", cmd);
+
+  FILE *fp = popen (cmd, "r");
+  if (fp == NULL) {
+    reply_with_perror ("%s", cmd);
+    free (cmd);
+    return -1;
+  }
+  free (cmd);
+
+  /* Now we must send the reply message, before the file contents.  After
+   * this there is no opportunity in the protocol to send any error
+   * message back.  Instead we can only cancel the transfer.
+   */
+  reply (NULL, NULL);
+
+  char str[GUESTFS_MAX_CHUNK_SIZE];
+
+  while ((r = fread (str, 1, GUESTFS_MAX_CHUNK_SIZE, fp)) > 0) {
+    if (send_file_write (str, r) < 0) {
+      pclose (fp);
+      return -1;
+    }
+  }
+
+  if (ferror (fp)) {
+    perror (dir);
+    send_file_end (1);                /* Cancel. */
+    pclose (fp);
+    return -1;
+  }
+
+  if (pclose (fp) != 0) {
+    perror (dir);
+    send_file_end (1);                /* Cancel. */
+    return -1;
+  }
+
+  if (send_file_end (0))        /* Normal end of file. */
+    return -1;
+
+  return 0;
+}