AM_CONDITIONAL([BABELTRACE_BUILD_WITH_LIBUUID], [test "x$have_libuuid" = "xyes"])
AM_CONDITIONAL([BABELTRACE_BUILD_WITH_LIBC_UUID], [test "x$have_libc_uuid" = "xyes"])
+# Check for fmemopen
+AC_CHECK_LIB([c], [fmemopen],
+[
+ AC_DEFINE_UNQUOTED([BABELTRACE_HAVE_FMEMOPEN], 1, [Has fmemopen support.])
+]
+)
+
+# Check for open_memstream
+AC_CHECK_LIB([c], [open_memstream],
+[
+ AC_DEFINE_UNQUOTED([BABELTRACE_HAVE_OPEN_MEMSTREAM], 1, [Has open_memstream support.])
+]
+)
+
AC_CHECK_LIB([popt], [poptGetContext], [],
[AC_MSG_ERROR([Cannot find popt.])]
)
#include "metadata/ctf-parser.h"
#include "metadata/ctf-ast.h"
#include "events-private.h"
+#include "memstream.h"
/*
* We currently simply map a page to read the packet header and packet
* because its size includes garbage at the end (after final
* \0). This is the allocated size, not the actual string size.
*/
- out = open_memstream(buf, &size);
+ out = babeltrace_open_memstream(buf, &size);
if (out == NULL) {
perror("Metadata open_memstream");
return -errno;
break;
}
}
- fclose(out); /* flush the buffer */
+ /* close to flush the buffer */
+ ret = babeltrace_close_memstream(buf, &size, out);
+ if (ret < 0) {
+ perror("babeltrace_flush_memstream");
+ fclose(in);
+ return -errno;
+ }
fclose(in);
/* open for reading */
- *fp = fmemopen(*buf, strlen(*buf), "rb");
+ *fp = babeltrace_fmemopen(*buf, strlen(*buf), "rb");
if (!*fp) {
perror("Metadata fmemopen");
return -errno;
--- /dev/null
+#ifndef _BABELTRACE_FORMAT_CTF_MEMSTREAM_H
+#define _BABELTRACE_FORMAT_CTF_MEMSTREAM_H
+
+/*
+ * format/ctf/memstream.h
+ *
+ * Copyright 2012 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * memstream compatibility layer.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+
+#define _GNU_SOURCE
+#include <config.h>
+
+#ifdef BABELTRACE_HAVE_FMEMOPEN
+#include <stdio.h>
+
+static inline
+FILE *babeltrace_fmemopen(void *buf, size_t size, const char *mode)
+{
+ return fmemopen(buf, size, mode);
+}
+
+#else /* BABELTRACE_HAVE_FMEMOPEN */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+/*
+ * Fallback for systems which don't have fmemopen. Copy buffer to a
+ * temporary file, and use that file as FILE * input.
+ */
+static inline
+FILE *babeltrace_fmemopen(void *buf, size_t size, const char *mode)
+{
+ char tmpname[PATH_MAX];
+ size_t len;
+ FILE *fp;
+ int ret;
+
+ /*
+ * Support reading only.
+ */
+ if (strcmp(mode, "rb") != 0) {
+ return NULL;
+ }
+ strncpy(tmpname, "/tmp/babeltrace-tmp-XXXXXX", PATH_MAX);
+ ret = mkstemp(tmpname);
+ if (ret < 0) {
+ return NULL;
+ }
+ /*
+ * We need to write to the file.
+ */
+ fp = fdopen(ret, "w+");
+ if (!fp) {
+ goto error_unlink;
+ }
+ /* Copy the entire buffer to the file */
+ len = fwrite(buf, sizeof(char), size, fp);
+ if (len != size) {
+ goto error_close;
+ }
+ ret = fseek(fp, 0L, SEEK_SET);
+ if (ret < 0) {
+ perror("fseek");
+ goto error_close;
+ }
+ /* We keep the handle open, but can unlink the file on the VFS. */
+ ret = unlink(tmpname);
+ if (ret < 0) {
+ perror("unlink");
+ }
+ return fp;
+
+error_close:
+ ret = fclose(fp);
+ if (ret < 0) {
+ perror("close");
+ }
+error_unlink:
+ ret = unlink(tmpname);
+ if (ret < 0) {
+ perror("unlink");
+ }
+ return NULL;
+}
+
+#endif /* BABELTRACE_HAVE_FMEMOPEN */
+
+#ifdef BABELTRACE_HAVE_OPEN_MEMSTREAM
+
+#include <stdio.h>
+
+static inline
+FILE *babeltrace_open_memstream(char **ptr, size_t *sizeloc)
+{
+ return open_memstream(ptr, sizeloc);
+}
+
+static inline
+int babeltrace_close_memstream(char **buf, size_t *size, FILE *fp)
+{
+ return fclose(fp);
+}
+
+#else /* BABELTRACE_HAVE_OPEN_MEMSTREAM */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+/*
+ * Fallback for systems which don't have open_memstream. Create FILE *
+ * with babeltrace_open_memstream, but require call to
+ * babeltrace_close_memstream to flush all data written to the FILE *
+ * into the buffer (which we allocate).
+ */
+static inline
+FILE *babeltrace_open_memstream(char **ptr, size_t *sizeloc)
+{
+ char tmpname[PATH_MAX];
+ int ret;
+ FILE *fp;
+
+ strncpy(tmpname, "/tmp/babeltrace-tmp-XXXXXX", PATH_MAX);
+ ret = mkstemp(tmpname);
+ if (ret < 0) {
+ return NULL;
+ }
+ fp = fdopen(ret, "w+");
+ if (!fp) {
+ goto error_unlink;
+ }
+ /*
+ * babeltrace_flush_memstream will update the buffer content
+ * with read from fp. No need to keep the file around, just the
+ * handle.
+ */
+ ret = unlink(tmpname);
+ if (ret < 0) {
+ perror("unlink");
+ }
+ return fp;
+
+error_unlink:
+ ret = unlink(tmpname);
+ if (ret < 0) {
+ perror("unlink");
+ }
+ return NULL;
+}
+
+/* Get file size, allocate buffer, copy. */
+static inline
+int babeltrace_close_memstream(char **buf, size_t *size, FILE *fp)
+{
+ size_t len, n;
+ long pos;
+ int ret;
+
+ ret = fflush(fp);
+ if (ret < 0) {
+ perror("fflush");
+ return ret;
+ }
+ ret = fseek(fp, 0L, SEEK_END);
+ if (ret < 0) {
+ perror("fseek");
+ return ret;
+ }
+ pos = ftell(fp);
+ if (ret < 0) {
+ perror("ftell");
+ return ret;
+ }
+ *size = pos;
+ /* add final \0 */
+ *buf = calloc(pos + 1, sizeof(char));
+ if (!*buf) {
+ return -ENOMEM;
+ }
+ ret = fseek(fp, 0L, SEEK_SET);
+ if (ret < 0) {
+ perror("fseek");
+ goto error_free;
+ }
+ /* Copy the entire file into the buffer */
+ n = 0;
+ clearerr(fp);
+ while (!feof(fp) && !ferror(fp) && (*size - n > 0)) {
+ len = fread(*buf, sizeof(char), *size - n, fp);
+ n += len;
+ }
+ if (n != *size) {
+ ret = -1;
+ goto error_close;
+ }
+ ret = fclose(fp);
+ if (ret < 0) {
+ perror("fclose");
+ return ret;
+ }
+ return 0;
+
+error_close:
+ ret = fclose(fp);
+ if (ret < 0) {
+ perror("fclose");
+ }
+error_free:
+ free(*buf);
+ *buf = NULL;
+ return ret;
+}
+
+#endif /* BABELTRACE_HAVE_OPEN_MEMSTREAM */
+
+#endif /* _BABELTRACE_FORMAT_CTF_MEMSTREAM_H */
projects / babeltrace.git / commitdiff
