Adding upstream version 1.9.15p5.upstream/1.9.15p5upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 199 insertions, 0 deletions

diff --git a/lib/util/mkdir_parents.c b/lib/util/mkdir_parents.c
new file mode 100644
index 0000000..b483748
--- /dev/null
+++ b/lib/util/mkdir_parents.c
@@ -0,0 +1,199 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2009-2022 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * 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.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#include <sys/stat.h>
+#include <stdio.h>
+#include <stdlib.h>
+#ifdef HAVE_STDBOOL_H
+# include <stdbool.h>
+#else
+# include <compat/stdbool.h>
+#endif /* HAVE_STDBOOL_H */
+#include <string.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+
+#include <sudo_compat.h>
+#include <sudo_fatal.h>
+#include <sudo_gettext.h>
+#include <sudo_debug.h>
+#include <sudo_util.h>
+
+#ifndef O_NOFOLLOW
+# define O_NOFOLLOW 0
+#endif
+
+/*
+ * Returns true if fd is a directory, else false.
+ * Warns on failure if not quiet.
+ */
+static bool
+is_dir(int dfd, const char *name, int namelen, bool quiet)
+{
+    struct stat sb;
+    debug_decl(is_dir, SUDO_DEBUG_UTIL);
+
+    if (fstat(dfd, &sb) != 0) {
+	if (!quiet) {
+	    sudo_warn(U_("unable to stat %.*s"), namelen, name);
+	}
+	debug_return_bool(false);
+    }
+    if (!S_ISDIR(sb.st_mode)) {
+	if (!quiet) {
+	    sudo_warnx(U_("%.*s exists but is not a directory (0%o)"),
+		namelen, name, (unsigned int) sb.st_mode);
+	}
+	debug_return_bool(false);
+    }
+
+    debug_return_bool(true);
+}
+
+/*
+ * Create any parent directories needed by path (but not path itself)
+ * and return an open fd for the parent directory or -1 on error.
+ */
+int
+sudo_open_parent_dir_v1(const char *path, uid_t uid, gid_t gid, mode_t mode,
+    bool quiet)
+{
+    const char *cp, *ep, *pathend;
+    char name[PATH_MAX];
+    int parentfd;
+    debug_decl(sudo_open_parent_dir, SUDO_DEBUG_UTIL);
+
+    /* Starting parent dir is either root or cwd. */
+    cp = path;
+    if (*cp == '/') {
+	do {
+	    cp++;
+	} while (*cp == '/');
+	parentfd = open("/", O_RDONLY|O_NONBLOCK);
+    } else {
+	parentfd = open(".", O_RDONLY|O_NONBLOCK);
+    }
+    if (parentfd == -1) {
+	if (!quiet)
+	    sudo_warn(U_("unable to open %s"), *path == '/' ? "/" : ".");
+	debug_return_int(-1);
+    }
+
+    /* Iterate over path components, skipping the last one. */
+    pathend = cp + strlen(cp);
+    for (cp = sudo_strsplit(cp, pathend, "/", &ep); cp != NULL && ep < pathend;
+	cp = sudo_strsplit(NULL, pathend, "/", &ep)) {
+	size_t len = (size_t)(ep - cp);
+	int dfd;
+
+	sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
+	    "mkdir %.*s, mode 0%o, uid %d, gid %d", (int)(ep - path), path,
+	    (unsigned int)mode, (int)uid, (int)gid);
+	if (len >= sizeof(name)) {
+	    errno = ENAMETOOLONG;
+	    if (!quiet)
+		sudo_warn(U_("unable to mkdir %.*s"), (int)(ep - path), path);
+	    goto bad;
+	}
+	memcpy(name, cp, len);
+	name[len] = '\0';
+reopen:
+	dfd = openat(parentfd, name, O_RDONLY|O_NONBLOCK, 0);
+	if (dfd == -1) {
+	    if (errno != ENOENT) {
+		if (!quiet) {
+		    sudo_warn(U_("unable to open %.*s"),
+			(int)(ep - path), path);
+		}
+		goto bad;
+	    }
+	    if (mkdirat(parentfd, name, mode) == 0) {
+		dfd = openat(parentfd, name, O_RDONLY|O_NONBLOCK|O_NOFOLLOW, 0);
+		if (dfd == -1) {
+		    if (!quiet) {
+			sudo_warn(U_("unable to open %.*s"),
+			    (int)(ep - path), path);
+		    }
+		    goto bad;
+		}
+		/* Make sure the path we created is still a directory. */
+		if (!is_dir(dfd, path, (int)(ep - path), quiet)) {
+		    close(dfd);
+		    goto bad;
+		}
+		if (uid != (uid_t)-1 && gid != (gid_t)-1) {
+		    if (fchown(dfd, uid, gid) != 0) {
+			sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_ERRNO,
+			    "%s: unable to chown %d:%d %.*s", __func__,
+			    (int)uid, (int)gid, (int)(ep - path), path);
+		    }
+		}
+	    } else {
+		if (errno == EEXIST)
+		    goto reopen;
+		if (!quiet) {
+		    sudo_warn(U_("unable to mkdir %.*s"),
+			(int)(ep - path), path);
+		}
+		goto bad;
+	    }
+	} else {
+	    /* Already exists, make sure it is a directory. */
+	    if (!is_dir(dfd, path, (int)(ep - path), quiet)) {
+		close(dfd);
+		goto bad;
+	    }
+	}
+	close(parentfd);
+	parentfd = dfd;
+    }
+
+    debug_return_int(parentfd);
+bad:
+    if (parentfd != -1)
+	close(parentfd);
+    debug_return_int(-1);
+}
+
+/*
+ * Create any parent directories needed by path (but not path itself).
+ * Not currently used.
+ */
+bool
+sudo_mkdir_parents_v1(const char *path, uid_t uid, gid_t gid, mode_t mode,
+    bool quiet)
+{
+    int fd;
+    debug_decl(sudo_mkdir_parents, SUDO_DEBUG_UTIL);
+
+    fd = sudo_open_parent_dir(path, uid, gid, mode, quiet);
+    if (fd == -1)
+	debug_return_bool(false);
+    close(fd);
+    debug_return_bool(true);
+}