-/* LBS: An LFS-inspired filesystem backup system
- * Copyright (C) 2007 Michael Vrable
+/* Cumulus: Efficient Filesystem Backup to the Cloud
+ * Copyright (C) 2007-2008 The Cumulus Developers
+ * See the AUTHORS file for a list of contributors.
*
- * Utility functions for converting various datatypes to text format (and
- * later, for parsing them back, perhaps).
+ * 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.
*/
+/* Utility functions for converting various datatypes to text format (and
+ * later, for parsing them back, perhaps). */
+
+#include <stdarg.h>
#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
#include <uuid/uuid.h>
#include <iostream>
#include <string>
#include <sstream>
+#include "util.h"
+
using std::map;
using std::ostream;
using std::string;
+/* Like sprintf, but returns the output as an allocated string. */
+string string_printf(const char *fmt, ...)
+{
+ va_list args;
+ char *output = NULL;
+ string result;
+
+ va_start(args, fmt);
+ if (vasprintf(&output, fmt, args) < 0) {
+ /* TODO: Error signalling? */
+ return result;
+ }
+ result = output;
+ va_end(args);
+
+ free(output);
+ return result;
+}
+
/* Perform URI-style escaping of a string. Bytes which cannot be represented
* directly are encoded in the form %xx (where "xx" is a string of two
* hexadecimal digits). */
* advisory. For negative numbers, will always use decimal. */
string encode_int(long long n, int base)
{
- char buf[64];
-
- if (n >= 0 && base == 16) {
- sprintf(buf, "0x%llx", n);
- return buf;
- }
-
- if (n > 0 && base == 8) {
- sprintf(buf, "0%llo", n);
- return buf;
- }
-
- sprintf(buf, "%lld", n);
- return buf;
+ if (n >= 0 && base == 16)
+ return string_printf("0x%llx", n);
+ else if (n > 0 && base == 8)
+ return string_printf("0%llo", n);
+ else
+ return string_printf("%lld", n);
}
/* Parse the string representation of an integer. Accepts decimal, octal, and
return strtoll(s.c_str(), NULL, 0);
}
-/* Output a dictionary of string key/value pairs to the given output stream.
- * The format is a sequence of lines of the form "key: value". */
-void dict_output(ostream &o, map<string, string> dict)
+/* Mark a file descriptor as close-on-exec. */
+void cloexec(int fd)
{
- for (map<string, string>::const_iterator i = dict.begin();
- i != dict.end(); ++i) {
- o << i->first << ": " << i->second << "\n";
- }
+ long flags = fcntl(fd, F_GETFD);
+
+ if (flags < 0)
+ return;
+
+ fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
+}
+
+/* Report a fatal error and exit. */
+void fatal(string msg)
+{
+ fprintf(stderr, "FATAL: %s\n", msg.c_str());
+ exit(1);
+}
+
+/* Available time formats. */
+const char TimeFormat::FORMAT_FILENAME[] = "%Y%m%dT%H%M%S";
+const char TimeFormat::FORMAT_ISO8601[] = "%Y-%m-%d %H:%M:%S";
+const char TimeFormat::FORMAT_LOCALTIME[] = "%Y-%m-%d %H:%M:%S %z";
+
+static size_t MAX_TIMESTAMP_LENGTH = 1024;
+
+std::string TimeFormat::format(time_t timestamp, const char *format, bool utc)
+{
+ struct tm time_buf;
+
+ if (utc)
+ gmtime_r(×tamp, &time_buf);
+ else
+ localtime_r(×tamp, &time_buf);
+
+ char buffer[MAX_TIMESTAMP_LENGTH];
+ strftime(buffer, MAX_TIMESTAMP_LENGTH, format, &time_buf);
+ return string(buffer);
}