diff options
Diffstat (limited to 'loginutils')
| -rw-r--r-- | loginutils/Config.in | 8 | ||||
| -rw-r--r-- | loginutils/login.c | 22 |
2 files changed, 30 insertions, 0 deletions
diff --git a/loginutils/Config.in b/loginutils/Config.in index 71e0a3a..6e45b70 100644 --- a/loginutils/Config.in +++ b/loginutils/Config.in @@ -111,6 +111,14 @@ config CONFIG_LOGIN Note that Busybox binary must be setuid root for this applet to work properly. +config CONFIG_LOGIN_SCRIPTS + bool "Support for login scripts" + depends on CONFIG_LOGIN + default n + help + Enable this if you want login to execute $LOGIN_PRE_SUID_SCRIPT + just prior to swithching from root to logged-in user. + config CONFIG_FEATURE_SECURETTY bool "Support for /etc/securetty" default y diff --git a/loginutils/login.c b/loginutils/login.c index 5b4edd8..39d980f 100644 --- a/loginutils/login.c +++ b/loginutils/login.c @@ -15,6 +15,7 @@ #include <sys/resource.h> #include <sys/stat.h> #include <sys/types.h> +#include <sys/wait.h> #include <ctype.h> #include <time.h> @@ -258,6 +259,27 @@ auth_ok: chown ( full_tty, pw-> pw_uid, pw-> pw_gid ); chmod ( full_tty, 0600 ); + if (ENABLE_LOGIN_SCRIPTS) { + char *script = getenv("LOGIN_PRE_SUID_SCRIPT"); + if (script) { + char *t_argv[2] = { script, NULL }; + switch(fork()) { + case -1: break; + case 0: /* child */ + xchdir("/"); + setenv("LOGIN_TTY", full_tty, 1); + setenv("LOGIN_USER", pw->pw_name, 1); + setenv("LOGIN_UID", utoa(pw->pw_uid), 1); + setenv("LOGIN_GID", utoa(pw->pw_gid), 1); + setenv("LOGIN_SHELL", pw->pw_shell, 1); + execvp(script, t_argv); + exit(1); + default: /* parent */ + wait(NULL); + } + } + } + change_identity ( pw ); tmp = pw-> pw_shell; if(!tmp || !*tmp) |