Move external code used by libxbps into lib/external.

lib/external/mkpath.c

@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 1983, 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * The following is a modified function from NetBSD's src/bin/mkdir/mkdir.c
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+#include "xbps_api_impl.h"
+
+int
+xbps_mkpath(const char *path, mode_t mode)
+{
+	struct stat sb;
+	char *ppath, *slash;
+	int done = 0, rv;
+	mode_t dir_mode;
+
+	if ((ppath = strdup(path)) == NULL)
+		return -1;
+
+	slash = ppath;
+	/*
+	 * The default file mode is a=rwx (0777) with selected permissions
+	 * removed in accordance with the file mode creation mask.  For
+	 * intermediate path name components, the mode is the default modified
+	 * by u+wx so that the subdirectories can always be created.
+	 */
+	if (mode == 0)
+		mode = (S_IRWXU | S_IRWXG | S_IRWXO) & ~umask(0);
+
+	dir_mode = mode | S_IWUSR | S_IXUSR;
+
+	for (;;) {
+		slash += strspn(slash, "/");
+		slash += strcspn(slash, "/");
+
+		done = (*slash == '\0');
+		*slash = '\0';
+
+		rv = mkdir(ppath, done ? mode : dir_mode);
+		if (rv < 0) {
+			/*
+			 * Can't create; path exists or no perms.
+			 * stat() path to determine what's there now.
+			 */
+			int	sverrno;
+
+			sverrno = errno;
+			if (stat(ppath, &sb) < 0) {
+				/* Not there; use mkdir()s error */
+				errno = sverrno;
+				free(ppath);
+				return -1;
+			}
+			if (!S_ISDIR(sb.st_mode)) {
+				/* Is there, but isn't a directory */
+				errno = ENOTDIR;
+				free(ppath);
+				return -1;
+			}
+		}
+		if (done)
+			break;
+
+		*slash = '/';
+	}
+	free(ppath);
+
+	return 0;
+}