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-rw-r--r--examples/inittab20
-rw-r--r--init.c66
-rw-r--r--init/init.c66
-rw-r--r--scripts/inittab20
4 files changed, 134 insertions, 38 deletions
diff --git a/examples/inittab b/examples/inittab
index bb547b7..2515264 100644
--- a/examples/inittab
+++ b/examples/inittab
@@ -44,7 +44,6 @@
# tty2::askfirst:/bin/sh
#
-
# Boot-time system configuration/initialization script.
# This is run first except when booting in single-user mode.
#
@@ -52,16 +51,23 @@
# /bin/sh invocations on selected ttys
#
-# Start an "askfirst" shell on the console (whatever that may be)
-::askfirst:/bin/sh
-# Start an "askfirst" shell on /dev/tty2
-tty2::askfirst:/bin/sh
+# Note below that we prefix the shell commands with a "-" to indicate to the
+# shell that it is supposed to be a login shell. Normally this is handled by
+# login, but since we are bypassing login in this case, BusyBox lets you do
+# this yourself...
+#
+# Start an "askfirst" shell on the console (whatever that may be).
+::askfirst:-/bin/sh
+#
+# Start an "askfirst" shell on /dev/tty2-4
+tty2::askfirst:-/bin/sh
+tty3::askfirst:-/bin/sh
+tty4::askfirst:-/bin/sh
# /sbin/getty invocations for selected ttys
#
-tty4::respawn:/sbin/getty 38400 tty4
tty5::respawn:/sbin/getty 38400 tty5
-
+tty6::respawn:/sbin/getty 38400 tty6
# Example of how to put a getty on a serial line (for a terminal)
#
diff --git a/init.c b/init.c
index b3ae97d..7af8c4a 100644
--- a/init.c
+++ b/init.c
@@ -120,10 +120,12 @@ static _syscall2(int, bdflush, int, func, int, data);
#define VT_PRIMARY "/dev/tty1" /* Primary virtual console */
#define VT_SECONDARY "/dev/tty2" /* Virtual console */
-#define VT_LOG "/dev/tty3" /* Virtual console */
+#define VT_THIRD "/dev/tty3" /* Virtual console */
+#define VT_FOURTH "/dev/tty4" /* Virtual console */
+#define VT_LOG "/dev/tty5" /* Virtual console */
#define SERIAL_CON0 "/dev/ttyS0" /* Primary serial console */
#define SERIAL_CON1 "/dev/ttyS1" /* Serial console */
-#define SHELL "/bin/sh" /* Default shell */
+#define SHELL "-/bin/sh" /* Default shell */
#define INITTAB "/etc/inittab" /* inittab file location */
#ifndef INIT_SCRIPT
#define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */
@@ -171,6 +173,8 @@ initAction *initActionList = NULL;
static char *secondConsole = VT_SECONDARY;
+static char *thirdConsole = VT_THIRD;
+static char *fourthConsole = VT_FOURTH;
static char *log = VT_LOG;
static int kernelVersion = 0;
static char termType[32] = "TERM=linux";
@@ -371,11 +375,13 @@ static void console_init()
/* Perhaps we should panic here? */
snprintf(console, sizeof(console) - 1, "/dev/null");
} else {
- /* check for serial console and disable logging to tty3 & running a
- * shell to tty2 */
+ /* check for serial console and disable logging to tty5 & running a
+ * shell to tty2-4 */
if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
log = NULL;
secondConsole = NULL;
+ thirdConsole = NULL;
+ fourthConsole = NULL;
/* Force the TERM setting to vt102 for serial console --
* iff TERM is set to linux (the default) */
if (strcmp( termType, "TERM=linux" ) == 0)
@@ -393,7 +399,7 @@ static pid_t run(char *command, char *terminal, int get_enter)
int i, fd;
pid_t pid;
char *tmpCmd;
- char *cmd[255];
+ char *cmd[255], *cmdpath;
char buf[255];
static const char press_enter[] =
@@ -404,11 +410,9 @@ static pid_t run(char *command, char *terminal, int get_enter)
"SHELL=/bin/sh",
termType,
"USER=root",
- "ENV=/etc/profile",
0
};
-
if ((pid = fork()) == 0) {
/* Clean up */
ioctl(0, TIOCNOTTY, 0);
@@ -481,6 +485,34 @@ static pid_t run(char *command, char *terminal, int get_enter)
cmd[i] = NULL;
}
+ cmdpath = cmd[0];
+
+ /*
+ Interactive shells want to see a dash in argv[0]. This
+ typically is handled by login, argv will be setup this
+ way if a dash appears at the front of the command path
+ (like "-/bin/sh").
+ */
+
+ if (*cmdpath == '-') {
+ char *s;
+
+ /* skip over the dash */
+ ++cmdpath;
+
+ /* find the last component in the command pathname */
+ s = get_last_path_component(cmdpath);
+
+ /* make a new argv[0] */
+ if ((cmd[0] = malloc(strlen(s)+2)) == NULL) {
+ message(LOG | CONSOLE, "malloc failed");
+ cmd[0] = cmdpath;
+ } else {
+ cmd[0][0] = '-';
+ strcpy(cmd[0]+1, s);
+ }
+ }
+
#if defined BB_FEATURE_INIT_COREDUMPS
{
struct stat sb;
@@ -495,11 +527,11 @@ static pid_t run(char *command, char *terminal, int get_enter)
/* Now run it. The new program will take over this PID,
* so nothing further in init.c should be run. */
- execve(cmd[0], cmd, environment);
+ execve(cmdpath, cmd, environment);
- /* We're still here? Some error happened. */
- message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmd[0],
- strerror(errno));
+ /* We're still here? Some error happened. */
+ message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmdpath,
+ strerror(errno));
exit(-1);
}
return pid;
@@ -795,6 +827,12 @@ void parse_inittab(void)
/* Askfirst shell on tty2 */
if (secondConsole != NULL)
new_initAction(ASKFIRST, SHELL, secondConsole);
+ /* Askfirst shell on tty3 */
+ if (thirdConsole != NULL)
+ new_initAction(ASKFIRST, SHELL, thirdConsole);
+ /* Askfirst shell on tty4 */
+ if (fourthConsole != NULL)
+ new_initAction(ASKFIRST, SHELL, fourthConsole);
/* sysinit */
new_initAction(SYSINIT, INIT_SCRIPT, console);
@@ -958,9 +996,13 @@ extern int init_main(int argc, char **argv)
/* Check if we are supposed to be in single user mode */
if (argc > 1 && (!strcmp(argv[1], "single") ||
!strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) {
- /* Ask first then start a shell on tty2 */
+ /* Ask first then start a shell on tty2-4 */
if (secondConsole != NULL)
new_initAction(ASKFIRST, SHELL, secondConsole);
+ if (thirdConsole != NULL)
+ new_initAction(ASKFIRST, SHELL, thirdConsole);
+ if (fourthConsole != NULL)
+ new_initAction(ASKFIRST, SHELL, fourthConsole);
/* Start a shell on tty1 */
new_initAction(RESPAWN, SHELL, console);
} else {
diff --git a/init/init.c b/init/init.c
index b3ae97d..7af8c4a 100644
--- a/init/init.c
+++ b/init/init.c
@@ -120,10 +120,12 @@ static _syscall2(int, bdflush, int, func, int, data);
#define VT_PRIMARY "/dev/tty1" /* Primary virtual console */
#define VT_SECONDARY "/dev/tty2" /* Virtual console */
-#define VT_LOG "/dev/tty3" /* Virtual console */
+#define VT_THIRD "/dev/tty3" /* Virtual console */
+#define VT_FOURTH "/dev/tty4" /* Virtual console */
+#define VT_LOG "/dev/tty5" /* Virtual console */
#define SERIAL_CON0 "/dev/ttyS0" /* Primary serial console */
#define SERIAL_CON1 "/dev/ttyS1" /* Serial console */
-#define SHELL "/bin/sh" /* Default shell */
+#define SHELL "-/bin/sh" /* Default shell */
#define INITTAB "/etc/inittab" /* inittab file location */
#ifndef INIT_SCRIPT
#define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */
@@ -171,6 +173,8 @@ initAction *initActionList = NULL;
static char *secondConsole = VT_SECONDARY;
+static char *thirdConsole = VT_THIRD;
+static char *fourthConsole = VT_FOURTH;
static char *log = VT_LOG;
static int kernelVersion = 0;
static char termType[32] = "TERM=linux";
@@ -371,11 +375,13 @@ static void console_init()
/* Perhaps we should panic here? */
snprintf(console, sizeof(console) - 1, "/dev/null");
} else {
- /* check for serial console and disable logging to tty3 & running a
- * shell to tty2 */
+ /* check for serial console and disable logging to tty5 & running a
+ * shell to tty2-4 */
if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
log = NULL;
secondConsole = NULL;
+ thirdConsole = NULL;
+ fourthConsole = NULL;
/* Force the TERM setting to vt102 for serial console --
* iff TERM is set to linux (the default) */
if (strcmp( termType, "TERM=linux" ) == 0)
@@ -393,7 +399,7 @@ static pid_t run(char *command, char *terminal, int get_enter)
int i, fd;
pid_t pid;
char *tmpCmd;
- char *cmd[255];
+ char *cmd[255], *cmdpath;
char buf[255];
static const char press_enter[] =
@@ -404,11 +410,9 @@ static pid_t run(char *command, char *terminal, int get_enter)
"SHELL=/bin/sh",
termType,
"USER=root",
- "ENV=/etc/profile",
0
};
-
if ((pid = fork()) == 0) {
/* Clean up */
ioctl(0, TIOCNOTTY, 0);
@@ -481,6 +485,34 @@ static pid_t run(char *command, char *terminal, int get_enter)
cmd[i] = NULL;
}
+ cmdpath = cmd[0];
+
+ /*
+ Interactive shells want to see a dash in argv[0]. This
+ typically is handled by login, argv will be setup this
+ way if a dash appears at the front of the command path
+ (like "-/bin/sh").
+ */
+
+ if (*cmdpath == '-') {
+ char *s;
+
+ /* skip over the dash */
+ ++cmdpath;
+
+ /* find the last component in the command pathname */
+ s = get_last_path_component(cmdpath);
+
+ /* make a new argv[0] */
+ if ((cmd[0] = malloc(strlen(s)+2)) == NULL) {
+ message(LOG | CONSOLE, "malloc failed");
+ cmd[0] = cmdpath;
+ } else {
+ cmd[0][0] = '-';
+ strcpy(cmd[0]+1, s);
+ }
+ }
+
#if defined BB_FEATURE_INIT_COREDUMPS
{
struct stat sb;
@@ -495,11 +527,11 @@ static pid_t run(char *command, char *terminal, int get_enter)
/* Now run it. The new program will take over this PID,
* so nothing further in init.c should be run. */
- execve(cmd[0], cmd, environment);
+ execve(cmdpath, cmd, environment);
- /* We're still here? Some error happened. */
- message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmd[0],
- strerror(errno));
+ /* We're still here? Some error happened. */
+ message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmdpath,
+ strerror(errno));
exit(-1);
}
return pid;
@@ -795,6 +827,12 @@ void parse_inittab(void)
/* Askfirst shell on tty2 */
if (secondConsole != NULL)
new_initAction(ASKFIRST, SHELL, secondConsole);
+ /* Askfirst shell on tty3 */
+ if (thirdConsole != NULL)
+ new_initAction(ASKFIRST, SHELL, thirdConsole);
+ /* Askfirst shell on tty4 */
+ if (fourthConsole != NULL)
+ new_initAction(ASKFIRST, SHELL, fourthConsole);
/* sysinit */
new_initAction(SYSINIT, INIT_SCRIPT, console);
@@ -958,9 +996,13 @@ extern int init_main(int argc, char **argv)
/* Check if we are supposed to be in single user mode */
if (argc > 1 && (!strcmp(argv[1], "single") ||
!strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) {
- /* Ask first then start a shell on tty2 */
+ /* Ask first then start a shell on tty2-4 */
if (secondConsole != NULL)
new_initAction(ASKFIRST, SHELL, secondConsole);
+ if (thirdConsole != NULL)
+ new_initAction(ASKFIRST, SHELL, thirdConsole);
+ if (fourthConsole != NULL)
+ new_initAction(ASKFIRST, SHELL, fourthConsole);
/* Start a shell on tty1 */
new_initAction(RESPAWN, SHELL, console);
} else {
diff --git a/scripts/inittab b/scripts/inittab
index bb547b7..2515264 100644
--- a/scripts/inittab
+++ b/scripts/inittab
@@ -44,7 +44,6 @@
# tty2::askfirst:/bin/sh
#
-
# Boot-time system configuration/initialization script.
# This is run first except when booting in single-user mode.
#
@@ -52,16 +51,23 @@
# /bin/sh invocations on selected ttys
#
-# Start an "askfirst" shell on the console (whatever that may be)
-::askfirst:/bin/sh
-# Start an "askfirst" shell on /dev/tty2
-tty2::askfirst:/bin/sh
+# Note below that we prefix the shell commands with a "-" to indicate to the
+# shell that it is supposed to be a login shell. Normally this is handled by
+# login, but since we are bypassing login in this case, BusyBox lets you do
+# this yourself...
+#
+# Start an "askfirst" shell on the console (whatever that may be).
+::askfirst:-/bin/sh
+#
+# Start an "askfirst" shell on /dev/tty2-4
+tty2::askfirst:-/bin/sh
+tty3::askfirst:-/bin/sh
+tty4::askfirst:-/bin/sh
# /sbin/getty invocations for selected ttys
#
-tty4::respawn:/sbin/getty 38400 tty4
tty5::respawn:/sbin/getty 38400 tty5
-
+tty6::respawn:/sbin/getty 38400 tty6
# Example of how to put a getty on a serial line (for a terminal)
#
generated by cgit v1.1 at 2024-12-30 19:42:11 +0000