New APIs: isoinfo and isoinfo-device.

Get ISO primary volume descriptor information for either ISO devices
or ISO files.

2 files changed, 293 insertions, 0 deletions

diff --git a/daemon/Makefile.am b/daemon/Makefile.am
index 74d24fcf..02c21df9 100644
--- a/daemon/Makefile.am
+++ b/daemon/Makefile.am
@@ -125,6 +125,7 @@ guestfsd_SOURCES = \
 	inotify.c \
 	internal.c \
 	is.c \
+	isoinfo.c \
 	labels.c \
 	link.c \
 	ls.c \
diff --git a/daemon/isoinfo.c b/daemon/isoinfo.c
new file mode 100644
index 00000000..c0ee1c9a
--- /dev/null
+++ b/daemon/isoinfo.c
@@ -0,0 +1,292 @@
+/* libguestfs - the guestfsd daemon
+ * Copyright (C) 2012 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.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <string.h>
+#include <unistd.h>
+#include <time.h>
+
+#include "guestfs_protocol.h"
+#include "daemon.h"
+#include "actions.h"
+
+static int
+parse_uint32 (uint32_t *ret, const char *str)
+{
+  uint32_t r;
+
+  if (sscanf (str, "%" SCNu32, &r) != 1) {
+    reply_with_error ("cannot parse numeric field from isoinfo: %s", str);
+    return -1;
+  }
+
+  *ret = r;
+  return 0;
+}
+
+/* This is always in a fixed format:
+ * "2012 03 16 11:05:46.00"
+ * or if the field is not present, then:
+ * "0000 00 00 00:00:00.00"
+ */
+static int
+parse_time_t (int64_t *ret, const char *str)
+{
+  struct tm tm;
+  time_t r;
+
+  if (STREQ (str, "0000 00 00 00:00:00.00")) {
+    *ret = -1;
+    return 0;
+  }
+
+  if (sscanf (str, "%04d %02d %02d %02d:%02d:%02d",
+              &tm.tm_year, &tm.tm_mon, &tm.tm_mday,
+              &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) {
+    reply_with_error ("cannot parse date from isoinfo: %s", str);
+    return -1;
+  }
+
+  /* Adjust fields. */
+  tm.tm_year -= 1900;
+  tm.tm_mon--;
+  tm.tm_isdst = -1;
+
+  /* Convert to time_t. */
+  r = timegm (&tm);
+  if (r == -1) {
+    reply_with_error ("invalid date or time: %s", str);
+    return -1;
+  }
+
+  *ret = r;
+  return 0;
+}
+
+static guestfs_int_isoinfo *
+parse_isoinfo (char **lines)
+{
+  guestfs_int_isoinfo *ret;
+  size_t i;
+
+  ret = calloc (1, sizeof *ret);
+  if (ret == NULL) {
+    reply_with_perror ("calloc");
+    return NULL;
+  }
+
+  /* Default each int field in the struct to -1. */
+  ret->iso_volume_space_size = (uint32_t) -1;
+  ret->iso_volume_set_size = (uint32_t) -1;
+  ret->iso_volume_sequence_number = (uint32_t) -1;
+  ret->iso_logical_block_size = (uint32_t) -1;
+  ret->iso_volume_creation_t = -1;
+  ret->iso_volume_modification_t = -1;
+  ret->iso_volume_expiration_t = -1;
+  ret->iso_volume_effective_t = -1;
+
+  for (i = 0; lines[i] != NULL; ++i) {
+    if (STRPREFIX (lines[i], "System id: ")) {
+      ret->iso_system_id = strdup (&lines[i][11]);
+      if (ret->iso_system_id == NULL) goto error;
+    }
+    else if (STRPREFIX (lines[i], "Volume id: ")) {
+      ret->iso_volume_id = strdup (&lines[i][11]);
+      if (ret->iso_volume_id == NULL) goto error;
+    }
+    else if (STRPREFIX (lines[i], "Volume set id: ")) {
+      ret->iso_volume_set_id = strdup (&lines[i][15]);
+      if (ret->iso_volume_set_id == NULL) goto error;
+    }
+    else if (STRPREFIX (lines[i], "Publisher id: ")) {
+      ret->iso_publisher_id = strdup (&lines[i][14]);
+      if (ret->iso_publisher_id == NULL) goto error;
+    }
+    else if (STRPREFIX (lines[i], "Data preparer id: ")) {
+      ret->iso_data_preparer_id = strdup (&lines[i][18]);
+      if (ret->iso_data_preparer_id == NULL) goto error;
+    }
+    else if (STRPREFIX (lines[i], "Application id: ")) {
+      ret->iso_application_id = strdup (&lines[i][16]);
+      if (ret->iso_application_id == NULL) goto error;
+    }
+    else if (STRPREFIX (lines[i], "Copyright File id: ")) {
+      ret->iso_copyright_file_id = strdup (&lines[i][19]);
+      if (ret->iso_copyright_file_id == NULL) goto error;
+    }
+    else if (STRPREFIX (lines[i], "Abstract File id: ")) {
+      ret->iso_abstract_file_id = strdup (&lines[i][18]);
+      if (ret->iso_abstract_file_id == NULL) goto error;
+    }
+    else if (STRPREFIX (lines[i], "Bibliographic File id: ")) {
+      ret->iso_bibliographic_file_id = strdup (&lines[i][23]);
+      if (ret->iso_bibliographic_file_id == NULL) goto error;
+    }
+    else if (STRPREFIX (lines[i], "Volume size is: ")) {
+      if (parse_uint32 (&ret->iso_volume_space_size, &lines[i][16]) == -1)
+        goto error;
+    }
+    else if (STRPREFIX (lines[i], "Volume set size is: ")) {
+      if (parse_uint32 (&ret->iso_volume_set_size, &lines[i][20]) == -1)
+        goto error;
+    }
+    else if (STRPREFIX (lines[i], "Volume set sequence number is: ")) {
+      if (parse_uint32 (&ret->iso_volume_sequence_number, &lines[i][31]) == -1)
+        goto error;
+    }
+    else if (STRPREFIX (lines[i], "Logical block size is: ")) {
+      if (parse_uint32 (&ret->iso_logical_block_size, &lines[i][23]) == -1)
+        goto error;
+    }
+    else if (STRPREFIX (lines[i], "Creation Date:     ")) {
+      if (parse_time_t (&ret->iso_volume_creation_t, &lines[i][19]) == -1)
+        goto error;
+    }
+    else if (STRPREFIX (lines[i], "Modification Date: ")) {
+      if (parse_time_t (&ret->iso_volume_modification_t, &lines[i][19]) == -1)
+        goto error;
+    }
+    else if (STRPREFIX (lines[i], "Expiration Date:   ")) {
+      if (parse_time_t (&ret->iso_volume_expiration_t, &lines[i][19]) == -1)
+        goto error;
+    }
+    else if (STRPREFIX (lines[i], "Effective Date:    ")) {
+      if (parse_time_t (&ret->iso_volume_effective_t, &lines[i][19]) == -1)
+        goto error;
+    }
+  }
+
+  /* Any string fields which were not set above will be NULL.  However
+   * we cannot return NULL fields in structs, so we convert these to
+   * empty strings here.
+   */
+  if (ret->iso_system_id == NULL) {
+    ret->iso_system_id = strdup ("");
+    if (ret->iso_system_id == NULL) goto error;
+  }
+  if (ret->iso_volume_id == NULL) {
+    ret->iso_volume_id = strdup ("");
+    if (ret->iso_volume_id == NULL) goto error;
+  }
+  if (ret->iso_volume_set_id == NULL) {
+    ret->iso_volume_set_id = strdup ("");
+    if (ret->iso_volume_set_id == NULL) goto error;
+  }
+  if (ret->iso_publisher_id == NULL) {
+    ret->iso_publisher_id = strdup ("");
+    if (ret->iso_publisher_id == NULL) goto error;
+  }
+  if (ret->iso_data_preparer_id == NULL) {
+    ret->iso_data_preparer_id = strdup ("");
+    if (ret->iso_data_preparer_id == NULL) goto error;
+  }
+  if (ret->iso_application_id == NULL) {
+    ret->iso_application_id = strdup ("");
+    if (ret->iso_application_id == NULL) goto error;
+  }
+  if (ret->iso_copyright_file_id == NULL) {
+    ret->iso_copyright_file_id = strdup ("");
+    if (ret->iso_copyright_file_id == NULL) goto error;
+  }
+  if (ret->iso_abstract_file_id == NULL) {
+    ret->iso_abstract_file_id = strdup ("");
+    if (ret->iso_abstract_file_id == NULL) goto error;
+  }
+  if (ret->iso_bibliographic_file_id == NULL) {
+    ret->iso_bibliographic_file_id = strdup ("");
+    if (ret->iso_bibliographic_file_id == NULL) goto error;
+  }
+
+  return ret;
+
+ error:
+  free (ret->iso_system_id);
+  free (ret->iso_volume_id);
+  free (ret->iso_volume_set_id);
+  free (ret->iso_publisher_id);
+  free (ret->iso_data_preparer_id);
+  free (ret->iso_application_id);
+  free (ret->iso_copyright_file_id);
+  free (ret->iso_abstract_file_id);
+  free (ret->iso_bibliographic_file_id);
+  free (ret);
+  return NULL;
+}
+
+static guestfs_int_isoinfo *
+isoinfo (const char *path)
+{
+  char *out = NULL, *err = NULL;
+  int r;
+  char **lines = NULL;
+  guestfs_int_isoinfo *ret = NULL;
+
+  /* --debug is necessary to get additional fields, in particular
+   * the date & time fields.
+   */
+  r = command (&out, &err, "isoinfo", "--debug", "-d", "-i", path, NULL);
+  if (r == -1) {
+    reply_with_error ("%s", err);
+    goto done;
+  }
+
+  lines = split_lines (out);
+  if (lines == NULL)
+    goto done;
+
+  ret = parse_isoinfo (lines);
+  if (ret == NULL)
+    goto done;
+
+ done:
+  free (out);
+  free (err);
+  if (lines)
+    free_strings (lines);
+
+  return ret;
+}
+
+guestfs_int_isoinfo *
+do_isoinfo_device (const char *device)
+{
+  return isoinfo (device);
+}
+
+guestfs_int_isoinfo *
+do_isoinfo (const char *path)
+{
+  char *buf;
+  guestfs_int_isoinfo *ret;
+
+  buf = sysroot_path (path);
+  if (!buf) {
+    reply_with_perror ("malloc");
+    return NULL;
+  }
+
+  ret = isoinfo (buf);
+  free (buf);
+
+  return ret;
+}