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Add in a patch from robotti@metconnect.com and Chip Rosenthal to make

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init do login shell stuff.
 -Erik
This commit is contained in:
Eric Andersen 2000-09-14 22:01:31 +00:00
parent ce40fc044b
commit 7e3bf6e339
4 changed files with 134 additions and 38 deletions
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20
examples/inittab
View File

@ -44,7 +44,6 @@
# tty2::askfirst:/bin/sh # tty2::askfirst:/bin/sh
# #
# Boot-time system configuration/initialization script. # Boot-time system configuration/initialization script.
# This is run first except when booting in single-user mode. # This is run first except when booting in single-user mode.
# #
@ -52,16 +51,23 @@
# /bin/sh invocations on selected ttys # /bin/sh invocations on selected ttys
# #
# Start an "askfirst" shell on the console (whatever that may be) # Note below that we prefix the shell commands with a "-" to indicate to the
::askfirst:/bin/sh # shell that it is supposed to be a login shell. Normally this is handled by
# Start an "askfirst" shell on /dev/tty2 # login, but since we are bypassing login in this case, BusyBox lets you do
tty2::askfirst:/bin/sh # 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 # /sbin/getty invocations for selected ttys
# #
tty4::respawn:/sbin/getty 38400 tty4
tty5::respawn:/sbin/getty 38400 tty5 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) # Example of how to put a getty on a serial line (for a terminal)
# #

66
init.c
View File

@ -120,10 +120,12 @@ static _syscall2(int, bdflush, int, func, int, data);
#define VT_PRIMARY "/dev/tty1" /* Primary virtual console */ #define VT_PRIMARY "/dev/tty1" /* Primary virtual console */
#define VT_SECONDARY "/dev/tty2" /* 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_CON0 "/dev/ttyS0" /* Primary serial console */
#define SERIAL_CON1 "/dev/ttyS1" /* 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 */ #define INITTAB "/etc/inittab" /* inittab file location */
#ifndef INIT_SCRIPT #ifndef INIT_SCRIPT
#define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit 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 *secondConsole = VT_SECONDARY;
static char *thirdConsole = VT_THIRD;
static char *fourthConsole = VT_FOURTH;
static char *log = VT_LOG; static char *log = VT_LOG;
static int kernelVersion = 0; static int kernelVersion = 0;
static char termType[32] = "TERM=linux"; static char termType[32] = "TERM=linux";
@ -371,11 +375,13 @@ static void console_init()
/* Perhaps we should panic here? */ /* Perhaps we should panic here? */
snprintf(console, sizeof(console) - 1, "/dev/null"); snprintf(console, sizeof(console) - 1, "/dev/null");
} else { } else {
/* check for serial console and disable logging to tty3 & running a /* check for serial console and disable logging to tty5 & running a
* shell to tty2 */ * shell to tty2-4 */
if (ioctl(0, TIOCGSERIAL, &sr) == 0) { if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
log = NULL; log = NULL;
secondConsole = NULL; secondConsole = NULL;
thirdConsole = NULL;
fourthConsole = NULL;
/* Force the TERM setting to vt102 for serial console -- /* Force the TERM setting to vt102 for serial console --
* iff TERM is set to linux (the default) */ * iff TERM is set to linux (the default) */
if (strcmp( termType, "TERM=linux" ) == 0) if (strcmp( termType, "TERM=linux" ) == 0)
@ -393,7 +399,7 @@ static pid_t run(char *command, char *terminal, int get_enter)
int i, fd; int i, fd;
pid_t pid; pid_t pid;
char *tmpCmd; char *tmpCmd;
char *cmd[255]; char *cmd[255], *cmdpath;
char buf[255]; char buf[255];
static const char press_enter[] = static const char press_enter[] =
@ -404,11 +410,9 @@ static pid_t run(char *command, char *terminal, int get_enter)
"SHELL=/bin/sh", "SHELL=/bin/sh",
termType, termType,
"USER=root", "USER=root",
"ENV=/etc/profile",
0 0
}; };
if ((pid = fork()) == 0) { if ((pid = fork()) == 0) {
/* Clean up */ /* Clean up */
ioctl(0, TIOCNOTTY, 0); ioctl(0, TIOCNOTTY, 0);
@ -481,6 +485,34 @@ static pid_t run(char *command, char *terminal, int get_enter)
cmd[i] = NULL; 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 #if defined BB_FEATURE_INIT_COREDUMPS
{ {
struct stat sb; 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, /* Now run it. The new program will take over this PID,
* so nothing further in init.c should be run. */ * 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. */ /* We're still here? Some error happened. */
message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmd[0], message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmdpath,
strerror(errno)); strerror(errno));
exit(-1); exit(-1);
} }
return pid; return pid;
@ -795,6 +827,12 @@ void parse_inittab(void)
/* Askfirst shell on tty2 */ /* Askfirst shell on tty2 */
if (secondConsole != NULL) if (secondConsole != NULL)
new_initAction(ASKFIRST, SHELL, secondConsole); 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 */ /* sysinit */
new_initAction(SYSINIT, INIT_SCRIPT, console); 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 */ /* Check if we are supposed to be in single user mode */
if (argc > 1 && (!strcmp(argv[1], "single") || if (argc > 1 && (!strcmp(argv[1], "single") ||
!strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) { !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) if (secondConsole != NULL)
new_initAction(ASKFIRST, SHELL, secondConsole); 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 */ /* Start a shell on tty1 */
new_initAction(RESPAWN, SHELL, console); new_initAction(RESPAWN, SHELL, console);
} else { } else {

66
init/init.c
View File

@ -120,10 +120,12 @@ static _syscall2(int, bdflush, int, func, int, data);
#define VT_PRIMARY "/dev/tty1" /* Primary virtual console */ #define VT_PRIMARY "/dev/tty1" /* Primary virtual console */
#define VT_SECONDARY "/dev/tty2" /* 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_CON0 "/dev/ttyS0" /* Primary serial console */
#define SERIAL_CON1 "/dev/ttyS1" /* 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 */ #define INITTAB "/etc/inittab" /* inittab file location */
#ifndef INIT_SCRIPT #ifndef INIT_SCRIPT
#define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit 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 *secondConsole = VT_SECONDARY;
static char *thirdConsole = VT_THIRD;
static char *fourthConsole = VT_FOURTH;
static char *log = VT_LOG; static char *log = VT_LOG;
static int kernelVersion = 0; static int kernelVersion = 0;
static char termType[32] = "TERM=linux"; static char termType[32] = "TERM=linux";
@ -371,11 +375,13 @@ static void console_init()
/* Perhaps we should panic here? */ /* Perhaps we should panic here? */
snprintf(console, sizeof(console) - 1, "/dev/null"); snprintf(console, sizeof(console) - 1, "/dev/null");
} else { } else {
/* check for serial console and disable logging to tty3 & running a /* check for serial console and disable logging to tty5 & running a
* shell to tty2 */ * shell to tty2-4 */
if (ioctl(0, TIOCGSERIAL, &sr) == 0) { if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
log = NULL; log = NULL;
secondConsole = NULL; secondConsole = NULL;
thirdConsole = NULL;
fourthConsole = NULL;
/* Force the TERM setting to vt102 for serial console -- /* Force the TERM setting to vt102 for serial console --
* iff TERM is set to linux (the default) */ * iff TERM is set to linux (the default) */
if (strcmp( termType, "TERM=linux" ) == 0) if (strcmp( termType, "TERM=linux" ) == 0)
@ -393,7 +399,7 @@ static pid_t run(char *command, char *terminal, int get_enter)
int i, fd; int i, fd;
pid_t pid; pid_t pid;
char *tmpCmd; char *tmpCmd;
char *cmd[255]; char *cmd[255], *cmdpath;
char buf[255]; char buf[255];
static const char press_enter[] = static const char press_enter[] =
@ -404,11 +410,9 @@ static pid_t run(char *command, char *terminal, int get_enter)
"SHELL=/bin/sh", "SHELL=/bin/sh",
termType, termType,
"USER=root", "USER=root",
"ENV=/etc/profile",
0 0
}; };
if ((pid = fork()) == 0) { if ((pid = fork()) == 0) {
/* Clean up */ /* Clean up */
ioctl(0, TIOCNOTTY, 0); ioctl(0, TIOCNOTTY, 0);
@ -481,6 +485,34 @@ static pid_t run(char *command, char *terminal, int get_enter)
cmd[i] = NULL; 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 #if defined BB_FEATURE_INIT_COREDUMPS
{ {
struct stat sb; 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, /* Now run it. The new program will take over this PID,
* so nothing further in init.c should be run. */ * 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. */ /* We're still here? Some error happened. */
message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmd[0], message(LOG | CONSOLE, "Bummer, could not run '%s': %s\n", cmdpath,
strerror(errno)); strerror(errno));
exit(-1); exit(-1);
} }
return pid; return pid;
@ -795,6 +827,12 @@ void parse_inittab(void)
/* Askfirst shell on tty2 */ /* Askfirst shell on tty2 */
if (secondConsole != NULL) if (secondConsole != NULL)
new_initAction(ASKFIRST, SHELL, secondConsole); 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 */ /* sysinit */
new_initAction(SYSINIT, INIT_SCRIPT, console); 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 */ /* Check if we are supposed to be in single user mode */
if (argc > 1 && (!strcmp(argv[1], "single") || if (argc > 1 && (!strcmp(argv[1], "single") ||
!strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) { !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) if (secondConsole != NULL)
new_initAction(ASKFIRST, SHELL, secondConsole); 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 */ /* Start a shell on tty1 */
new_initAction(RESPAWN, SHELL, console); new_initAction(RESPAWN, SHELL, console);
} else { } else {

20
scripts/inittab
View File

@ -44,7 +44,6 @@
# tty2::askfirst:/bin/sh # tty2::askfirst:/bin/sh
# #
# Boot-time system configuration/initialization script. # Boot-time system configuration/initialization script.
# This is run first except when booting in single-user mode. # This is run first except when booting in single-user mode.
# #
@ -52,16 +51,23 @@
# /bin/sh invocations on selected ttys # /bin/sh invocations on selected ttys
# #
# Start an "askfirst" shell on the console (whatever that may be) # Note below that we prefix the shell commands with a "-" to indicate to the
::askfirst:/bin/sh # shell that it is supposed to be a login shell. Normally this is handled by
# Start an "askfirst" shell on /dev/tty2 # login, but since we are bypassing login in this case, BusyBox lets you do
tty2::askfirst:/bin/sh # 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 # /sbin/getty invocations for selected ttys
# #
tty4::respawn:/sbin/getty 38400 tty4
tty5::respawn:/sbin/getty 38400 tty5 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) # Example of how to put a getty on a serial line (for a terminal)
# #