Adding upstream version 1.9.13p3.upstream/1.9.13p3upstream

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

1 files changed, 143 insertions, 0 deletions

diff --git a/lib/iolog/iolog_mkdirs.c b/lib/iolog/iolog_mkdirs.c
new file mode 100644
index 0000000..c9ab980
--- /dev/null
+++ b/lib/iolog/iolog_mkdirs.c
@@ -0,0 +1,143 @@
+/*
+ * 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
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#include "sudo_compat.h"
+#include "sudo_debug.h"
+#include "sudo_fatal.h"
+#include "sudo_gettext.h"
+#include "sudo_iolog.h"
+#include "sudo_util.h"
+
+/*
+ * Create directory and any parent directories as needed.
+ */
+bool
+iolog_mkdirs(const char *path)
+{
+    const mode_t iolog_filemode = iolog_get_file_mode();
+    const mode_t iolog_dirmode = iolog_get_dir_mode();
+    const uid_t iolog_uid = iolog_get_uid();
+    const gid_t iolog_gid = iolog_get_gid();
+    bool ok = true, uid_changed = false;
+    struct stat sb;
+    mode_t omask;
+    int dfd;
+    debug_decl(iolog_mkdirs, SUDO_DEBUG_UTIL);
+
+    dfd = open(path, O_RDONLY|O_NONBLOCK);
+    if (dfd == -1 && errno == EACCES) {
+	/* Try again as the I/O log owner (for NFS). */
+	if (iolog_swapids(false)) {
+	    dfd = open(path, O_RDONLY|O_NONBLOCK);
+	    if (!iolog_swapids(true)) {
+		ok = false;
+		goto done;
+	    }
+	}
+    }
+    if (dfd != -1 && fstat(dfd, &sb) != -1) {
+	if (S_ISDIR(sb.st_mode)) {
+	    if (sb.st_uid != iolog_uid || sb.st_gid != iolog_gid) {
+		if (fchown(dfd, iolog_uid, iolog_gid) != 0) {
+		    sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_ERRNO,
+			"%s: unable to chown %d:%d %s", __func__,
+			(int)iolog_uid, (int)iolog_gid, path);
+		}
+	    }
+	    if ((sb.st_mode & ALLPERMS) != iolog_dirmode) {
+		if (fchmod(dfd, iolog_dirmode) != 0) {
+		    sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_ERRNO,
+			"%s: unable to chmod 0%o %s", __func__,
+			(int)iolog_dirmode, path);
+		}
+	    }
+	} else {
+	    sudo_warnx(U_("%s exists but is not a directory (0%o)"),
+		path, (unsigned int) sb.st_mode);
+	    ok = false;
+	}
+	goto done;
+    }
+
+    /* umask must not be more restrictive than the file modes. */
+    omask = umask(ACCESSPERMS & ~(iolog_filemode|iolog_dirmode));
+
+    ok = false;
+    if (dfd != -1)
+	close(dfd);
+    dfd = sudo_open_parent_dir(path, iolog_uid, iolog_gid, iolog_dirmode, true);
+    if (dfd == -1 && errno == EACCES) {
+	/* Try again as the I/O log owner (for NFS). */
+	uid_changed = iolog_swapids(false);
+	if (uid_changed)
+	    dfd = sudo_open_parent_dir(path, -1, -1, iolog_dirmode, false);
+    }
+    if (dfd != -1) {
+	/* Create final path component. */
+	const char *base = sudo_basename(path);
+	sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
+	    "mkdir %s, mode 0%o", path, (unsigned int) iolog_dirmode);
+	ok = mkdirat(dfd, base, iolog_dirmode) == 0 || errno == EEXIST;
+	if (!ok) {
+	    if (errno == EACCES && !uid_changed) {
+		/* Try again as the I/O log owner (for NFS). */
+		uid_changed = iolog_swapids(false);
+		if (uid_changed)
+		    ok = mkdirat(dfd, base, iolog_dirmode) == 0 || errno == EEXIST;
+	    }
+	    if (!ok)
+		sudo_warn(U_("unable to mkdir %s"), path);
+	} else {
+	    if (fchownat(dfd, base, iolog_uid, iolog_gid, AT_SYMLINK_NOFOLLOW) != 0) {
+		sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_ERRNO,
+		    "%s: unable to chown %d:%d %s", __func__,
+		    (int)iolog_uid, (int)iolog_gid, path);
+	    }
+	}
+    }
+    if (uid_changed) {
+	if (!iolog_swapids(true))
+	    ok = false;
+    }
+
+    umask(omask);
+
+done:
+    if (dfd != -1)
+	close(dfd);
+    debug_return_bool(ok);
+}