Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

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

1 files changed, 170 insertions, 0 deletions

diff --git a/lib/util/util_paths.c b/lib/util/util_paths.c
new file mode 100644
index 0000000..ce93028
--- /dev/null
+++ b/lib/util/util_paths.c
@@ -0,0 +1,170 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Samba utility functions
+   Copyright (C) Andrew Tridgell 1992-1998
+   Copyright (C) Jeremy Allison 2001-2007
+   Copyright (C) Simo Sorce 2001
+   Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
+   Copyright (C) James Peach 2006
+   Copyright (c) 2020      Andreas Schneider <asn@samba.org>
+
+   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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "replace.h"
+#include "dynconfig/dynconfig.h"
+#include "lib/util/util_paths.h"
+#include "system/passwd.h"
+#include "system/filesys.h"
+
+/**
+ * @brief Returns an absolute path to a file in the Samba modules directory.
+ *
+ * @param name File to find, relative to MODULESDIR.
+ *
+ * @retval Pointer to a string containing the full path.
+ **/
+
+char *modules_path(TALLOC_CTX *mem_ctx, const char *name)
+{
+	return talloc_asprintf(mem_ctx, "%s/%s", get_dyn_MODULESDIR(), name);
+}
+
+/**
+ * @brief Returns an absolute path to a file in the Samba data directory.
+ *
+ * @param name File to find, relative to CODEPAGEDIR.
+ *
+ * @retval Pointer to a talloc'ed string containing the full path.
+ **/
+
+char *data_path(TALLOC_CTX *mem_ctx, const char *name)
+{
+	return talloc_asprintf(mem_ctx, "%s/%s", get_dyn_CODEPAGEDIR(), name);
+}
+
+/**
+ * @brief Returns the platform specific shared library extension.
+ *
+ * @retval Pointer to a const char * containing the extension.
+ **/
+
+const char *shlib_ext(void)
+{
+	return get_dyn_SHLIBEXT();
+}
+
+static char *get_user_home_dir(TALLOC_CTX *mem_ctx)
+{
+	struct passwd pwd = {0};
+	struct passwd *pwdbuf = NULL;
+	char *buf = NULL;
+	char *out = NULL;
+	long int initlen;
+	size_t len;
+	int rc;
+
+	initlen = sysconf(_SC_GETPW_R_SIZE_MAX);
+	if (initlen == -1) {
+		len = 1024;
+	} else {
+		len = (size_t)initlen;
+	}
+	buf = talloc_size(mem_ctx, len);
+	if (buf == NULL) {
+		return NULL;
+	}
+
+	rc = getpwuid_r(getuid(), &pwd, buf, len, &pwdbuf);
+	while (rc == ERANGE) {
+		size_t newlen = 2 * len;
+		if (newlen < len) {
+			/* Overflow */
+			goto done;
+		}
+		len = newlen;
+		buf = talloc_realloc_size(mem_ctx, buf, len);
+		if (buf == NULL) {
+			goto done;
+		}
+		rc = getpwuid_r(getuid(), &pwd, buf, len, &pwdbuf);
+	}
+	if (rc != 0 || pwdbuf == NULL ) {
+		const char *szPath = getenv("HOME");
+		if (szPath == NULL) {
+			goto done;
+		}
+		len = strnlen(szPath, PATH_MAX);
+		if (len >= PATH_MAX) {
+			goto done;
+		}
+		out = talloc_strdup(mem_ctx, szPath);
+		goto done;
+	}
+
+	out = talloc_strdup(mem_ctx, pwd.pw_dir);
+done:
+	TALLOC_FREE(buf);
+	return out;
+}
+
+char *path_expand_tilde(TALLOC_CTX *mem_ctx, const char *d)
+{
+	char *h = NULL, *r = NULL;
+	const char *p = NULL;
+	struct stat sb = {0};
+	int rc;
+
+	if (d[0] != '~') {
+		return talloc_strdup(mem_ctx, d);
+	}
+	d++;
+
+	/* handle ~user/path */
+	p = strchr(d, '/');
+	if (p != NULL && p > d) {
+		struct passwd *pw;
+		size_t s = p - d;
+		char u[128];
+
+		if (s >= sizeof(u)) {
+			return NULL;
+		}
+		memcpy(u, d, s);
+		u[s] = '\0';
+
+		pw = getpwnam(u);
+		if (pw == NULL) {
+			return NULL;
+		}
+		h = talloc_strdup(mem_ctx, pw->pw_dir);
+	} else {
+		p = d;
+		h = get_user_home_dir(mem_ctx);
+	}
+	if (h == NULL) {
+		return NULL;
+	}
+
+	rc = stat(h, &sb);
+	if (rc != 0) {
+		TALLOC_FREE(h);
+		return NULL;
+	}
+
+	r = talloc_asprintf(mem_ctx, "%s%s", h, p);
+	TALLOC_FREE(h);
+
+	return r;
+}