Add chroot support to chpasswd

function                                             old     new   delta
.rodata                                           170689  170724     +35
packed_usage                                       32850   32876     +26
chpasswd_main                                        411     436     +25
chpasswd_longopts                                     34      41      +7
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/0 up/down: 93/0)               Total: 93 bytes

Signed-off-by: Jon Kolb <kolbyjack@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 13 insertions, 5 deletions

diff --git a/loginutils/chpasswd.c b/loginutils/chpasswd.c
index 652e4f127..4b3602e7a 100644
--- a/loginutils/chpasswd.c
+++ b/loginutils/chpasswd.c
@@ -24,18 +24,20 @@
 //kbuild:lib-$(CONFIG_CHPASSWD) += chpasswd.o
 
 //usage:#define chpasswd_trivial_usage
-//usage:        IF_LONG_OPTS("[--md5|--encrypted|--crypt-method]") IF_NOT_LONG_OPTS("[-m|-e|-c]")
+//usage:        IF_LONG_OPTS("[--md5|--encrypted|--crypt-method|--root]") IF_NOT_LONG_OPTS("[-m|-e|-c|-R]")
 //usage:#define chpasswd_full_usage "\n\n"
 //usage:       "Read user:password from stdin and update /etc/passwd\n"
 //usage:        IF_LONG_OPTS(
 //usage:     "\n        -e,--encrypted          Supplied passwords are in encrypted form"
-//usage:     "\n        -m,--md5                Eencrypt using md5, not des"
+//usage:     "\n        -m,--md5                Encrypt using md5, not des"
 //usage:     "\n        -c,--crypt-method ALG   "CRYPT_METHODS_HELP_STR
+//usage:     "\n        -R,--root DIR           Directory to chroot into"
 //usage:        )
 //usage:        IF_NOT_LONG_OPTS(
 //usage:     "\n        -e      Supplied passwords are in encrypted form"
-//usage:     "\n        -m      Eencrypt using md5, not des"
+//usage:     "\n        -m      Encrypt using md5, not des"
 //usage:     "\n        -c ALG  "CRYPT_METHODS_HELP_STR
+//usage:     "\n        -R DIR  Directory to chroot into"
 //usage:        )
 
 #include "libbb.h"
@@ -45,6 +47,7 @@ static const char chpasswd_longopts[] ALIGN1 =
         "encrypted\0"    No_argument       "e"
         "md5\0"          No_argument       "m"
         "crypt-method\0" Required_argument "c"
+        "root\0"         Required_argument "R"
         ;
 #endif
 
@@ -56,16 +59,21 @@ int chpasswd_main(int argc UNUSED_PARAM, char **argv)
 {
         char *name;
         const char *algo = CONFIG_FEATURE_DEFAULT_PASSWD_ALGO;
+        const char *root = NULL;
         int opt;
 
         if (getuid() != 0)
                 bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
 
-        opt = getopt32long(argv, "^" "emc:" "\0" "m--ec:e--mc:c--em",
+        opt = getopt32long(argv, "^" "emc:R:" "\0" "m--ec:e--mc:c--em",
                         chpasswd_longopts,
-                        &algo
+                        &algo, &root
         );
 
+        if (root) {
+                xchroot(root);
+        }
+
         while ((name = xmalloc_fgetline(stdin)) != NULL) {
                 char *free_me;
                 char *pass;