crontab: use setup_environment

function                                             old     new   delta
setup_environment                                    184     198     +14
.rodata                                           131770  131747     -23
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 14/-23)             Total: -9 bytes

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

diff --git a/include/libbb.h b/include/libbb.h
index 9e3c184076e93c8c311a4b0cea95a701d7c1a8e1..9d99b0d1afa8d281a89bf87dab72d2f984e1720d 100644 (file)
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -1142,6 +1142,7 @@ extern void selinux_or_die(void) FAST_FUNC;
 extern int restricted_shell(const char *shell) FAST_FUNC;
 
 /* setup_environment:
+ * if chdir pw->pw_dir: ok: else if to_tmp == 1: goto /tmp else: goto / or die
  * if clear_env = 1: cd(pw->pw_dir), clear environment, then set
  *   TERM=(old value)
  *   USER=pw->pw_name, LOGNAME=pw->pw_name
@@ -1155,7 +1156,9 @@ extern int restricted_shell(const char *shell) FAST_FUNC;
  *   SHELL=shell
  * else does nothing
  */
-extern void setup_environment(const char *shell, int clear_env, int change_env, const struct passwd *pw) FAST_FUNC;
+#define SETUP_ENV_CHANGEENV (1<<0)
+#define SETUP_ENV_TO_TMP    (1<<1)
+extern void setup_environment(const char *shell, int clear_env, int flags, const struct passwd *pw) FAST_FUNC;
 extern int correct_password(const struct passwd *pw) FAST_FUNC;
 /* Returns a malloced string */
 #if !ENABLE_USE_BB_CRYPT

diff --git a/libbb/setup_environment.c b/libbb/setup_environment.c
index 78318ce62f24da4187f0a29688b5255669188036..f0802f0e5e23cfb2ecaca443602d71f74c01bd1e 100644 (file)
--- a/libbb/setup_environment.c
+++ b/libbb/setup_environment.c
@@ -30,12 +30,12 @@
 
 #include "libbb.h"
 
-void FAST_FUNC setup_environment(const char *shell, int clear_env, int change_env, const struct passwd *pw)
+void FAST_FUNC setup_environment(const char *shell, int clear_env, int flags, const struct passwd *pw)
 {
        /* Change the current working directory to be the home directory
         * of the user */
        if (chdir(pw->pw_dir)) {
-               xchdir("/");
+               xchdir((flags & SETUP_ENV_TO_TMP) ? "/tmp" : "/");
                bb_error_msg("can't chdir to home directory '%s'", pw->pw_dir);
        }
 
@@ -55,8 +55,7 @@ void FAST_FUNC setup_environment(const char *shell, int clear_env, int change_en
                //xsetenv("LOGNAME", pw->pw_name);
                //xsetenv("HOME",    pw->pw_dir);
                //xsetenv("SHELL",   shell);
-       }
-       else if (change_env) {
+       } else if (flags & SETUP_ENV_CHANGEENV) {
                /* Set HOME, SHELL, and if not becoming a super-user,
                   USER and LOGNAME.  */
                if (pw->pw_uid) {

diff --git a/loginutils/login.c b/loginutils/login.c
index 7a6f246adbf2b882ce6fc40bfd7ec9e4968fd394..974125d8832bd6b52e6f5b706af555ac0c150cad 100644 (file)
--- a/loginutils/login.c
+++ b/loginutils/login.c
@@ -478,7 +478,7 @@ int login_main(int argc UNUSED_PARAM, char **argv)
        if (!tmp || !*tmp)
                tmp = DEFAULT_SHELL;
        /* setup_environment params: shell, clear_env, change_env, pw */
-       setup_environment(tmp, !(opt & LOGIN_OPT_p), 1, pw);
+       setup_environment(tmp, !(opt & LOGIN_OPT_p), SETUP_ENV_CHANGEENV, pw);
 
        motd();
 

diff --git a/miscutils/crontab.c b/miscutils/crontab.c
index 044440435be20e2fb007c41461edbdc69f1adc98..7d5709521ed94a5e29b663144b5443edc21dc3ea 100644 (file)
--- a/miscutils/crontab.c
+++ b/miscutils/crontab.c
@@ -17,22 +17,6 @@
 #define CRONUPDATE      "cron.update"
 #endif
 
-static void change_user(const struct passwd *pas)
-{
-       xsetenv("USER", pas->pw_name);
-       xsetenv("HOME", pas->pw_dir);
-       xsetenv("SHELL", DEFAULT_SHELL);
-
-       /* initgroups, setgid, setuid */
-       change_identity(pas);
-
-       if (chdir(pas->pw_dir) < 0) {
-               bb_perror_msg("chdir(%s) by %s failed",
-                               pas->pw_dir, pas->pw_name);
-               xchdir("/tmp");
-       }
-}
-
 static void edit_file(const struct passwd *pas, const char *file)
 {
        const char *ptr;
@@ -46,7 +30,10 @@ static void edit_file(const struct passwd *pas, const char *file)
        }
 
        /* CHILD - change user and run editor */
-       change_user(pas);
+       /* initgroups, setgid, setuid */
+       change_identity(pas);
+       setup_environment(DEFAULT_SHELL, 0,
+               SETUP_ENV_CHANGEENV | SETUP_ENV_TO_TMP, pas);
        ptr = getenv("VISUAL");
        if (!ptr) {
                ptr = getenv("EDITOR");