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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:54:37 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:54:37 +0000
commit97c26c1924b076ef23ebe4381558e8aa025712b2 (patch)
tree109724175f07436696f51b14b5abbd3f4d704d6d /libmisc/sub.c
parentInitial commit. (diff)
downloadshadow-97c26c1924b076ef23ebe4381558e8aa025712b2.tar.xz
shadow-97c26c1924b076ef23ebe4381558e8aa025712b2.zip
Adding upstream version 1:4.13+dfsg1.upstream/1%4.13+dfsg1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'libmisc/sub.c')
-rw-r--r--libmisc/sub.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/libmisc/sub.c b/libmisc/sub.c
new file mode 100644
index 0000000..d30c4c7
--- /dev/null
+++ b/libmisc/sub.c
@@ -0,0 +1,55 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1991, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1999, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2006, Tomasz Kłoczko
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <pwd.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include "prototypes.h"
+#include "defines.h"
+#define BAD_SUBROOT2 "invalid root `%s' for user `%s'\n"
+#define NO_SUBROOT2 "no subsystem root `%s' for user `%s'\n"
+/*
+ * subsystem - change to subsystem root
+ *
+ * A subsystem login is indicated by the presence of a "*" as
+ * the first character of the login shell. The given home
+ * directory will be used as the root of a new filesystem which
+ * the user is actually logged into.
+ */
+void subsystem (const struct passwd *pw)
+{
+ /*
+ * The new root directory must begin with a "/" character.
+ */
+
+ if (pw->pw_dir[0] != '/') {
+ printf (_("Invalid root directory '%s'\n"), pw->pw_dir);
+ SYSLOG ((LOG_WARN, BAD_SUBROOT2, pw->pw_dir, pw->pw_name));
+ closelog ();
+ exit (EXIT_FAILURE);
+ }
+
+ /*
+ * The directory must be accessible and the current process
+ * must be able to change into it.
+ */
+
+ if ( (chdir (pw->pw_dir) != 0)
+ || (chroot (pw->pw_dir) != 0)) {
+ (void) printf (_("Can't change root directory to '%s'\n"),
+ pw->pw_dir);
+ SYSLOG ((LOG_WARN, NO_SUBROOT2, pw->pw_dir, pw->pw_name));
+ closelog ();
+ exit (EXIT_FAILURE);
+ }
+}
+