Top level directory reorg

Move src/po -> po
Combine common and compat -> lib/util
Move zlib -> lib/zlib

lib/util/mktemp.c

@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2001, 2003, 2004, 2008-2011, 2013
+ *	Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <config.h>
+
+#if !defined(HAVE_MKSTEMPS) || !defined(HAVE_MKDTEMP)
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdio.h>
+#ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+#endif /* HAVE_STDLIB_H */
+#include <ctype.h>
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+#ifdef TIME_WITH_SYS_TIME
+# include <time.h>
+#endif
+
+#include "missing.h"
+
+#define MKTEMP_FILE	1
+#define MKTEMP_DIR	2
+
+#define TEMPCHARS	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+#define NUM_CHARS	(sizeof(TEMPCHARS) - 1)
+
+#ifndef INT_MAX
+#define INT_MAX	0x7fffffff
+#endif
+
+#ifdef HAVE_RANDOM
+# define RAND		random
+# define SRAND		srandom
+# define SEED_T		unsigned int
+#else
+# ifdef HAVE_LRAND48
+#  define RAND		lrand48
+#  define SRAND		srand48
+#  define SEED_T	long
+# else
+#  define RAND		rand
+#  define SRAND		srand
+#  define SEED_T	unsigned int
+# endif
+#endif
+
+static void
+seed_random(void)
+{
+	SEED_T seed;
+	struct timeval tv;
+
+	/*
+	 * Seed from time of day and process id multiplied by small primes.
+	 */
+	(void) gettimeofday(&tv, NULL);
+	seed = (tv.tv_sec % 10000) * 523 + tv.tv_usec * 13 +
+	    (getpid() % 1000) * 983;
+	SRAND(seed);
+}
+
+static unsigned int
+get_random(void)
+{
+	static int initialized;
+
+	if (!initialized) {
+		seed_random();
+		initialized = 1;
+	}
+
+	return RAND() & 0xffffffff;
+}
+
+static int
+mktemp_internal(char *path, int slen, int mode)
+{
+	char *start, *cp, *ep;
+	const char *tempchars = TEMPCHARS;
+	unsigned int r, tries;
+	int fd;
+
+	for (ep = path; *ep; ep++)
+		;
+	if (path + slen >= ep) {
+		errno = EINVAL;
+		return -1;
+	}
+	ep -= slen;
+
+	tries = 1;
+	for (start = ep; start > path && start[-1] == 'X'; start--) {
+		if (tries < INT_MAX / NUM_CHARS)
+			tries *= NUM_CHARS;
+	}
+	tries *= 2;
+
+	do {
+		for (cp = start; *cp; cp++) {
+			r = get_random() % NUM_CHARS;
+			*cp = tempchars[r];
+		}
+
+		switch (mode) {
+		case MKTEMP_FILE:
+			fd = open(path, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
+			if (fd != -1 || errno != EEXIST)
+				return fd;
+			break;
+		case MKTEMP_DIR:
+			if (mkdir(path, S_IRWXU) == 0)
+				return 0;
+			if (errno != EEXIST)
+				return -1;
+			break;
+		}
+	} while (--tries);
+
+	errno = EEXIST;
+	return -1;
+}
+
+#ifndef HAVE_MKSTEMPS
+int
+mkstemps(char *path, int slen)
+{
+	return mktemp_internal(path, slen, MKTEMP_FILE);
+}
+#endif /* HAVE_MKSTEMPS */
+
+#ifndef HAVE_MKDTEMP
+char *
+mkdtemp(char *path)
+{
+	if (mktemp_internal(path, 0, MKTEMP_DIR) == -1)
+		return NULL;
+	return path;
+}
+#endif /* HAVE_MKDTEMP */
+#endif /* !HAVE_MKSTEMPS || !HAVE_MKDTEMP */