From: "Richard W.M. Jones" <rjo...@redhat.com>
This is modelled on similar code in the daemon that we have used
successfully for a long time.
(cherry picked from commit 35278e4c186badb9e243628771da4cbd068ffaa0)
---
po/POTFILES | 1 +
src/Makefile.am | 1 +
src/guestfs-internal.h | 24 ++++++++++++++
src/stringsbuf.c | 88 ++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 114 insertions(+)
create mode 100644 src/stringsbuf.c
diff --git a/po/POTFILES b/po/POTFILES
index 92b9a18..bc4be6f 100644
--- a/po/POTFILES
+++ b/po/POTFILES
@@ -284,6 +284,7 @@ src/match.c
src/osinfo.c
src/private-data.c
src/proto.c
+src/stringsbuf.c
src/tmpdirs.c
src/utils.c
test-tool/test-tool.c
diff --git a/src/Makefile.am b/src/Makefile.am
index 57cdf34..3facf16 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -116,6 +116,7 @@ libguestfs_la_SOURCES = \
osinfo.c \
private-data.c \
proto.c \
+ stringsbuf.c \
tmpdirs.c \
libguestfs.syms
diff --git a/src/guestfs-internal.h b/src/guestfs-internal.h
index 1d08375..8fd6388 100644
--- a/src/guestfs-internal.h
+++ b/src/guestfs-internal.h
@@ -597,6 +597,30 @@ extern int guestfs___match6 (guestfs_h *g, const char
*str, const pcre *re, char
#define match3 guestfs___match3
#define match6 guestfs___match6
+/* stringsbuf.c */
+struct stringsbuf {
+ char **argv;
+ size_t size;
+ size_t alloc;
+};
+#define DECLARE_STRINGSBUF(v) \
+ struct stringsbuf (v) = { .argv = NULL, .size = 0, .alloc = 0 }
+
+extern void guestfs___add_string_nodup (guestfs_h *g, struct stringsbuf *sb,
char *str);
+extern void guestfs___add_string (guestfs_h *g, struct stringsbuf *sb, const
char *str);
+extern void guestfs___add_sprintf (guestfs_h *g, struct stringsbuf *sb, const
char *fs, ...)
+ __attribute__((format (printf,3,4)));
+extern void guestfs___end_stringsbuf (guestfs_h *g, struct stringsbuf *sb);
+
+extern void guestfs___free_stringsbuf (struct stringsbuf *sb);
+
+#ifdef HAVE_ATTRIBUTE_CLEANUP
+#define CLEANUP_FREE_STRINGSBUF
__attribute__((cleanup(guestfs___cleanup_free_stringsbuf)))
+#else
+#define CLEANUP_FREE_STRINGSBUF
+#endif
+extern void guestfs___cleanup_free_stringsbuf (struct stringsbuf *sb);
+
/* proto.c */
extern int guestfs___send (guestfs_h *g, int proc_nr, uint64_t progress_hint,
uint64_t optargs_bitmask, xdrproc_t xdrp, char *args);
extern int guestfs___recv (guestfs_h *g, const char *fn, struct
guestfs_message_header *hdr, struct guestfs_message_error *err, xdrproc_t xdrp,
char *ret);
diff --git a/src/stringsbuf.c b/src/stringsbuf.c
new file mode 100644
index 0000000..df1dfd6
--- /dev/null
+++ b/src/stringsbuf.c
@@ -0,0 +1,88 @@
+/* libguestfs
+ * Copyright (C) 2013 Red Hat Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/* Note: Don't confuse this with stringsbuf in the daemon. */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+
+#include "guestfs.h"
+#include "guestfs-internal.h"
+
+void
+guestfs___add_string_nodup (guestfs_h *g, struct stringsbuf *sb, char *str)
+{
+ if (sb->size >= sb->alloc) {
+ sb->alloc += 64;
+ sb->argv = safe_realloc (g, sb->argv, sb->alloc * sizeof (char *));
+ }
+
+ sb->argv[sb->size] = str;
+ sb->size++;
+}
+
+void
+guestfs___add_string (guestfs_h *g, struct stringsbuf *sb, const char *str)
+{
+ guestfs___add_string_nodup (g, sb, safe_strdup (g, str));
+}
+
+void
+guestfs___add_sprintf (guestfs_h *g, struct stringsbuf *sb,
+ const char *fs, ...)
+{
+ va_list args;
+ char *str;
+ int r;
+
+ va_start (args, fs);
+ r = vasprintf (&str, fs, args);
+ va_end (args);
+ if (r == -1)
+ g->abort_cb ();
+
+ guestfs___add_string_nodup (g, sb, str);
+}
+
+void
+guestfs___end_stringsbuf (guestfs_h *g, struct stringsbuf *sb)
+{
+ guestfs___add_string_nodup (g, sb, NULL);
+}
+
+void
+guestfs___free_stringsbuf (struct stringsbuf *sb)
+{
+ size_t i;
+
+ if (sb->argv) {
+ for (i = 0; i < sb->size; ++i)
+ free (sb->argv[i]);
+ }
+ free (sb->argv);
+}
+
+void
+guestfs___cleanup_free_stringsbuf (struct stringsbuf *sb)
+{
+ guestfs___free_stringsbuf (sb);
+}
--
1.8.3.1
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