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-rw-r--r--init/init.c33
-rw-r--r--miscutils/crond.c6
-rw-r--r--miscutils/crontab.c6
-rw-r--r--networking/zcip.c4
4 files changed, 22 insertions, 27 deletions
diff --git a/init/init.c b/init/init.c
index e02773cc0..e00a3b128 100644
--- a/init/init.c
+++ b/init/init.c
@@ -77,14 +77,6 @@ enum {
#endif
};
-static const char *const environment[] = {
- "HOME=/",
- bb_PATH_root_path,
- "SHELL=/bin/sh",
- "USER=root",
- NULL
-};
-
/* Function prototypes */
static void halt_reboot_pwoff(int sig) NORETURN;
@@ -118,15 +110,16 @@ static void message(int where, const char *fmt, ...)
{
static int log_fd = -1;
va_list arguments;
- int l;
+ unsigned l;
char msg[128];
msg[0] = '\r';
va_start(arguments, fmt);
- vsnprintf(msg + 1, sizeof(msg) - 2, fmt, arguments);
+ l = vsnprintf(msg + 1, sizeof(msg) - 2, fmt, arguments);
+ if (l > sizeof(msg) - 2)
+ l = sizeof(msg) - 2;
+ msg[l] = '\0';
va_end(arguments);
- msg[sizeof(msg) - 2] = '\0';
- l = strlen(msg);
if (ENABLE_FEATURE_INIT_SYSLOG) {
/* Log the message to syslogd */
@@ -213,6 +206,8 @@ static void console_init(void)
/* Make sure fd 0,1,2 are not closed
* (so that they won't be used by future opens) */
bb_sanitize_stdio();
+ /* Make sure init can't be blocked by writing to stderr */
+ fcntl(STDERR_FILENO, F_SETFL, fcntl(STDERR_FILENO, F_GETFL) | O_NONBLOCK);
}
s = getenv("TERM");
@@ -825,15 +820,15 @@ int init_main(int argc UNUSED_PARAM, char **argv)
set_sane_term();
xchdir("/");
setsid();
- {
- const char *const *e;
- /* Make sure environs is set to something sane */
- for (e = environment; *e; e++)
- putenv((char *) *e);
- }
+
+ /* Make sure environs is set to something sane */
+ putenv((char *) "HOME=/");
+ putenv((char *) bb_PATH_root_path);
+ putenv((char *) "SHELL=/bin/sh");
+ putenv((char *) "USER=root"); /* needed? why? */
if (argv[1])
- setenv("RUNLEVEL", argv[1], 1);
+ xsetenv("RUNLEVEL", argv[1]);
/* Hello world */
message(MAYBE_CONSOLE | L_LOG, "init started: %s", bb_banner);
diff --git a/miscutils/crond.c b/miscutils/crond.c
index 2f0bf6ea8..7d1908c63 100644
--- a/miscutils/crond.c
+++ b/miscutils/crond.c
@@ -187,7 +187,7 @@ int crond_main(int argc UNUSED_PARAM, char **argv)
xchdir(CDir);
//signal(SIGHUP, SIG_IGN); /* ? original crond dies on HUP... */
- setenv("SHELL", DEFAULT_SHELL, 1); /* once, for all future children */
+ xsetenv("SHELL", DEFAULT_SHELL); /* once, for all future children */
crondlog(LVL9 "crond (busybox "BB_VER") started, log level %d", LogLevel);
SynchronizeDir();
@@ -275,8 +275,8 @@ static void SetEnv(struct passwd *pas)
/* if we want to set user's shell instead: */
/*safe_setenv(env_var_user, "SHELL", pas->pw_shell, 5);*/
#else
- setenv("USER", pas->pw_name, 1);
- setenv("HOME", pas->pw_dir, 1);
+ xsetenv("USER", pas->pw_name);
+ xsetenv("HOME", pas->pw_dir);
#endif
/* currently, we use constant one: */
/*setenv("SHELL", DEFAULT_SHELL, 1); - done earlier */
diff --git a/miscutils/crontab.c b/miscutils/crontab.c
index f8662babb..ef6d94375 100644
--- a/miscutils/crontab.c
+++ b/miscutils/crontab.c
@@ -21,9 +21,9 @@
static void change_user(const struct passwd *pas)
{
- setenv("USER", pas->pw_name, 1);
- setenv("HOME", pas->pw_dir, 1);
- setenv("SHELL", DEFAULT_SHELL, 1);
+ xsetenv("USER", pas->pw_name);
+ xsetenv("HOME", pas->pw_dir);
+ xsetenv("SHELL", DEFAULT_SHELL);
/* initgroups, setgid, setuid */
change_identity(pas);
diff --git a/networking/zcip.c b/networking/zcip.c
index 221edd322..f406b6c16 100644
--- a/networking/zcip.c
+++ b/networking/zcip.c
@@ -144,7 +144,7 @@ static int run(char *argv[3], struct in_addr *ip)
if (ip) {
addr = inet_ntoa(*ip);
- setenv("ip", addr, 1);
+ xsetenv("ip", addr);
fmt -= 3;
}
bb_info_msg(fmt, argv[1], intf, addr);
@@ -238,7 +238,7 @@ int zcip_main(int argc, char **argv)
intf = argv[0];
script_av[0] = argv[1];
- setenv("interface", intf, 1);
+ xsetenv("interface", intf);
// initialize the interface (modprobe, ifup, etc)
script_av[1] = (char*)"init";