pool/sysvinit
SHA256
2
0
Fork 1
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
fc6c9b2a5d
sysvinit/sysvinit-2.88dsf-multiple-sulogin.patch

1501 lines
34 KiB
Diff
Raw Blame History

--- src/sulogin.c
+++ src/sulogin.c 2011-07-26 14:01:55.543926269 +0200
@@ -28,8 +28,10 @@
*
*/
+#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <sys/wait.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
@@ -44,13 +46,34 @@
#include <sys/ioctl.h>
#if defined(__GLIBC__)
# include <crypt.h>
+# define dovoid(f) if ((f)){}
#endif
+#ifdef __linux__
+# include <sys/statfs.h>
+# include <sys/mount.h>
+# include <linux/fs.h>
+# include <linux/magic.h>
+# include <linux/major.h>
+# ifndef TMPFS_MAGIC
+# define TMPFS_MAGIC 0x01021994
+# endif
+# ifndef MNT_DETACH
+# define MNT_DETACH 2
+# endif
+#endif
+
+#define BS CTRL('h')
+#define NL CTRL('j')
+#define CR CTRL('m')
#ifdef WITH_SELINUX
# include <selinux/selinux.h>
# include <selinux/get_context_list.h>
#endif
+#include "consoles.h"
+#define CONMAX 16
+
#define CHECK_DES 1
#define CHECK_MD5 1
@@ -63,102 +86,245 @@ char *Version = "@(#)sulogin 2.85-3 23-A
static int timeout;
static int profile;
+static volatile uint32_t openfd; /* Remember higher file descriptors */
+static volatile uint32_t *usemask;
-static void (*saved_sigint) = SIG_DFL;
-static void (*saved_sigtstp) = SIG_DFL;
-static void (*saved_sigquit) = SIG_DFL;
+static sighandler_t saved_sigint = SIG_DFL;
+static sighandler_t saved_sigtstp = SIG_DFL;
+static sighandler_t saved_sigquit = SIG_DFL;
+static sighandler_t saved_sighup = SIG_DFL;
static volatile sig_atomic_t alarm_rised;
+static volatile sig_atomic_t sigchild;
#ifndef IUCLC
# define IUCLC 0
#endif
-#if defined(SANE_TIO) && (SANE_TIO == 1)
/*
* Fix the tty modes and set reasonable defaults.
- * (I'm not sure if this is needed under Linux, but..)
*/
static
-void fixtty(void)
+void tcinit(struct console *con)
{
- struct termios tty;
- int serial;
+ int serial, flags;
+ struct termios *tio = &con->tio;
+ int fd = con->fd;
- /* Skip serial console */
- if (ioctl (0, TIOCMGET, (char*)&serial) == 0)
- goto out;
/* Expected error */
serial = errno = 0;
- tcgetattr(0, &tty);
+ /* Get line attributes */
+ if (tcgetattr(fd, tio) < 0) {
+ con->flags |= CON_NOTTY;
+ return;
+ }
+
+ /* Handle serial lines here */
+ if (ioctl (fd, TIOCMGET, (char*)&serial) == 0) {
+ speed_t ispeed, ospeed;
+ struct winsize ws;
+
+ /* this is a modem line */
+ con->flags |= CON_SERIAL;
+
+ /* Flush input and output queues on modem lines */
+ (void) tcflush(fd, TCIOFLUSH);
+
+ ispeed = cfgetispeed(tio);
+ ospeed = cfgetospeed(tio);
+
+ if (!ispeed) ispeed = TTYDEF_SPEED;
+ if (!ospeed) ospeed = TTYDEF_SPEED;
+
+ tio->c_iflag = tio->c_lflag = tio->c_oflag = 0;
+ tio->c_cflag = CREAD | CS8 | HUPCL | (tio->c_cflag & CLOCAL);
+
+ cfsetispeed(tio, ispeed);
+ cfsetospeed(tio, ospeed);
+
+ tio->c_line = 0;
+ tio->c_cc[VTIME] = 0;
+ tio->c_cc[VMIN] = 1;
+
+ if (ioctl(fd, TIOCGWINSZ, &ws) == 0) {
+ int set = 0;
+ if (ws.ws_row == 0) {
+ ws.ws_row = 24;
+ set++;
+ }
+ if (ws.ws_col == 0) {
+ ws.ws_col = 80;
+ set++;
+ }
+ (void)ioctl(fd, TIOCSWINSZ, &ws);
+ }
- /* Use defaults of <sys/ttydefaults.h> for base settings */
- tty.c_iflag |= TTYDEF_IFLAG;
- tty.c_oflag |= TTYDEF_OFLAG;
- tty.c_lflag |= TTYDEF_LFLAG;
- tty.c_cflag |= (TTYDEF_SPEED | TTYDEF_CFLAG);
+ goto setattr;
+ }
+#if defined(SANE_TIO) && (SANE_TIO == 1)
+ /*
+ * Use defaults of <sys/ttydefaults.h> for base settings
+ * of a local terminal line like a virtual console.
+ */
+ tio->c_iflag |= TTYDEF_IFLAG;
+ tio->c_oflag |= TTYDEF_OFLAG;
+ tio->c_lflag |= TTYDEF_LFLAG;
+# ifdef CBAUD
+ tio->c_lflag &= ~CBAUD;
+# endif
+ tio->c_cflag |= (B38400 | TTYDEF_CFLAG);
/* Sane setting, allow eight bit characters, no carriage return delay
* the same result as `stty sane cr0 pass8'
*/
- tty.c_iflag |= (BRKINT | ICRNL | IMAXBEL);
- tty.c_iflag &= ~(IGNBRK | INLCR | IGNCR | IXOFF | IUCLC | IXANY | ISTRIP);
- tty.c_oflag |= (OPOST | ONLCR | NL0 | CR0 | TAB0 | BS0 | VT0 | FF0);
- tty.c_oflag &= ~(OLCUC | OCRNL | ONOCR | ONLRET | OFILL | OFDEL |\
+ tio->c_iflag |= (BRKINT | ICRNL | IMAXBEL);
+ tio->c_iflag &= ~(IGNBRK | INLCR | IGNCR | IXOFF | IUCLC | IXANY | INPCK | ISTRIP);
+ tio->c_oflag |= (OPOST | ONLCR | NL0 | CR0 | TAB0 | BS0 | VT0 | FF0);
+ tio->c_oflag &= ~(OLCUC | OCRNL | ONOCR | ONLRET | OFILL | OFDEL |\
NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
- tty.c_lflag |= (ISIG | ICANON | IEXTEN | ECHO|ECHOE|ECHOK|ECHOCTL|ECHOKE);
- tty.c_lflag &= ~(ECHONL | NOFLSH | XCASE | TOSTOP | ECHOPRT);
- tty.c_cflag |= (CREAD | CS8 | B9600);
- tty.c_cflag &= ~(PARENB);
+ tio->c_lflag |= (ISIG | ICANON | IEXTEN | ECHO|ECHOE|ECHOK|ECHOKE);
+ tio->c_lflag &= ~(ECHONL|ECHOCTL|ECHOPRT | NOFLSH | XCASE | TOSTOP);
+ tio->c_cflag |= (CREAD | CS8 | HUPCL);
+ tio->c_cflag &= ~(PARODD | PARENB);
- /* VTIME and VMIN can overlap with VEOF and VEOL since they are
+ /*
+ * VTIME and VMIN can overlap with VEOF and VEOL since they are
* only used for non-canonical mode. We just set the at the
* beginning, so nothing bad should happen.
*/
- tty.c_cc[VTIME] = 0;
- tty.c_cc[VMIN] = 1;
- tty.c_cc[VINTR] = CINTR;
- tty.c_cc[VQUIT] = CQUIT;
- tty.c_cc[VERASE] = CERASE; /* ASCII DEL (0177) */
- tty.c_cc[VKILL] = CKILL;
- tty.c_cc[VEOF] = CEOF;
- tty.c_cc[VSWTC] = _POSIX_VDISABLE;
- tty.c_cc[VSTART] = CSTART;
- tty.c_cc[VSTOP] = CSTOP;
- tty.c_cc[VSUSP] = CSUSP;
- tty.c_cc[VEOL] = _POSIX_VDISABLE;
- tty.c_cc[VREPRINT] = CREPRINT;
- tty.c_cc[VDISCARD] = CDISCARD;
- tty.c_cc[VWERASE] = CWERASE;
- tty.c_cc[VLNEXT] = CLNEXT;
- tty.c_cc[VEOL2] = _POSIX_VDISABLE;
-
- tcsetattr(0, TCSANOW, &tty);
-out:
- return;
+ tio->c_cc[VTIME] = 0;
+ tio->c_cc[VMIN] = CMIN;
+ tio->c_cc[VINTR] = CINTR;
+ tio->c_cc[VQUIT] = CQUIT;
+ tio->c_cc[VERASE] = CERASE; /* ASCII DEL (0177) */
+ tio->c_cc[VKILL] = CKILL;
+ tio->c_cc[VEOF] = CEOF;
+# ifdef VSWTC
+ tio->c_cc[VSWTC] = _POSIX_VDISABLE;
+# else
+ tio->c_cc[VSWTCH] = _POSIX_VDISABLE;
+# endif
+ tio->c_cc[VSTART] = CSTART;
+ tio->c_cc[VSTOP] = CSTOP;
+ tio->c_cc[VSUSP] = CSUSP;
+ tio->c_cc[VEOL] = _POSIX_VDISABLE;
+ tio->c_cc[VREPRINT] = CREPRINT;
+ tio->c_cc[VDISCARD] = CDISCARD;
+ tio->c_cc[VWERASE] = CWERASE;
+ tio->c_cc[VLNEXT] = CLNEXT;
+ tio->c_cc[VEOL2] = _POSIX_VDISABLE;
+#endif
+setattr:
+ /* Set line attributes */
+ tcsetattr(fd, TCSANOW, tio);
+
+ /* Enable blocking mode for read and write */
+ if ((flags = fcntl(fd, F_GETFL, 0)) != -1)
+ (void)fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
}
+
+
+/*
+ * Finalize the tty modes on modem lines.
+ */
+static
+void tcfinal(struct console *con)
+{
+ int serial;
+ struct termios *tio = &con->tio;
+ int fd = con->fd;
+
+ /* Expected error */
+ serial = errno = 0;
+
+ if ((con->flags & CON_SERIAL) == 0) {
+#ifdef __linux__
+ setenv("TERM", "linux", 1);
+#else
+ setenv("TERM", "vt100", 1);
#endif
+ return;
+ }
+ if (con->flags & CON_NOTTY)
+ return;
+ setenv("TERM", "vt100", 1);
+
+ tio->c_iflag |= (IXON | IXOFF);
+ tio->c_lflag |= (ICANON | ISIG | ECHO|ECHOE|ECHOK|ECHOKE);
+ tio->c_oflag |= OPOST;
+
+ tio->c_cc[VINTR] = CINTR;
+ tio->c_cc[VQUIT] = CQUIT;
+ tio->c_cc[VERASE] = con->cp.erase;
+ tio->c_cc[VKILL] = con->cp.kill;
+ tio->c_cc[VEOF] = CEOF;
+#ifdef VSWTC
+ tio->c_cc[VSWTC] = _POSIX_VDISABLE;
+#else
+ tio->c_cc[VSWTCH] = _POSIX_VDISABLE;
+#endif
+ tio->c_cc[VSTART] = CSTART;
+ tio->c_cc[VSTOP] = CSTOP;
+ tio->c_cc[VSUSP] = CSUSP;
+ tio->c_cc[VEOL] = _POSIX_VDISABLE;
+
+ if (con->cp.eol == CR) {
+ tio->c_iflag |= ICRNL;
+ tio->c_iflag &= ~(INLCR|IGNCR);
+ tio->c_oflag |= ONLCR;
+ tio->c_oflag &= ~(OCRNL|ONLRET);
+ }
+
+ switch (con->cp.parity) {
+ default:
+ case 0:
+ tio->c_cflag &= ~(PARODD | PARENB);
+ tio->c_iflag &= ~(INPCK | ISTRIP);
+ break;
+ case 1: /* odd parity */
+ tio->c_cflag |= PARODD;
+ /* fall through */
+ case 2: /* even parity */
+ tio->c_cflag |= PARENB;
+ tio->c_iflag |= (INPCK | ISTRIP);
+ /* fall through */
+ case (1 | 2): /* no parity bit */
+ tio->c_cflag &= ~CSIZE;
+ tio->c_cflag |= CS7;
+ break;
+ }
+ /* Set line attributes */
+ (void)tcsetattr(fd, TCSANOW, tio);
+}
/*
* Called at timeout.
*/
static
# ifdef __GNUC__
+__attribute__((__noinline__))
void alrm_handler(int sig __attribute__((unused)))
# else
void alrm_handler(int sig)
# endif
{
- /* Timeout expired */
alarm_rised++;
+}
- signal(SIGINT, saved_sigint);
- signal(SIGTSTP, saved_sigtstp);
- signal(SIGQUIT, saved_sigquit);
-
- /* Never use exit(3) or stdio(3) within a signal handler */
+/*
+ * Called at timeout.
+ */
+static
+# ifdef __GNUC__
+__attribute__((__noinline__))
+void chld_handler(int sig __attribute__((unused)))
+# else
+void chld_handler(int sig)
+# endif
+{
+ sigchild++;
}
/*
@@ -305,7 +471,7 @@ struct passwd *getrootpwent(int try_manu
* or not found, return.
*/
if (p == NULL) {
- fprintf(stderr, "%s: no entry for root\n", F_PASSWD);
+ fprintf(stderr, "sulogin: %s: no entry for root\n\r", F_PASSWD);
return &pwd;
}
if (valid(pwd.pw_passwd)) return &pwd;
@@ -316,7 +482,7 @@ struct passwd *getrootpwent(int try_manu
*/
strcpy(pwd.pw_passwd, "");
if ((fp = fopen(F_SHADOW, "r")) == NULL) {
- fprintf(stderr, "%s: root password garbled\n", F_PASSWD);
+ fprintf(stderr, "sulogin: %s: root password garbled\n\r", F_PASSWD);
return &pwd;
}
while((p = fgets(sline, 256, fp)) != NULL) {
@@ -333,67 +499,215 @@ struct passwd *getrootpwent(int try_manu
* NULL it, and return.
*/
if (p == NULL) {
- fprintf(stderr, "%s: no entry for root\n", F_SHADOW);
+ fprintf(stderr, "sulogin: %s: no entry for root\n\r", F_SHADOW);
strcpy(pwd.pw_passwd, "");
}
if (!valid(pwd.pw_passwd)) {
- fprintf(stderr, "%s: root password garbled\n", F_SHADOW);
+ fprintf(stderr, "sulogin: %s: root password garbled\n\r", F_SHADOW);
strcpy(pwd.pw_passwd, ""); }
return &pwd;
}
/*
- * Ask for the password. Note that there is no
- * default timeout as we normally skip this during boot.
+ * Ask by prompt for the password.
*/
static
-char *getpasswd(char *crypted)
+void doprompt(const char *crypted, struct console *con)
{
- struct sigaction sa;
- struct termios old, tty;
- static char pass[128];
- char *ret = pass;
- int i;
+ struct termios tty;
+
+ if (con->flags & CON_SERIAL) {
+ tty = con->tio;
+ /*
+ * For prompting: map NL in output to CR-NL
+ * otherwise we may see stairs in the output.
+ */
+ tty.c_oflag |= (ONLCR | OPOST);
+ (void) tcsetattr(con->fd, TCSADRAIN, &tty);
+ }
+ if (con->file == (FILE*)0) {
+ if ((con->file = fdopen(con->fd, "r+")) == (FILE*)0)
+ goto err;
+ }
#if defined(USE_ONELINE)
if (crypted[0])
- printf("Give root password for login: ");
+ fprintf(con->file, "Give root password for login: ");
else
- printf("Press enter for login: ");
+ fprintf(con->file, "Press enter for login: ");
#else
if (crypted[0])
- printf("Give root password for maintenance\n");
+ fprintf(con->file, "Give root password for maintenance\n\r");
else
- printf("Press enter for maintenance");
- printf("(or type Control-D to continue): ");
+ fprintf(con->file, "Press enter for maintenance");
+ fprintf(con->file, "(or type Control-D to continue): ");
#endif
- fflush(stdout);
+ fflush(con->file);
+err:
+ if (con->flags & CON_SERIAL)
+ (void) tcsetattr(con->fd, TCSADRAIN, &con->tio);
+}
- tcgetattr(0, &old);
- tcgetattr(0, &tty);
- tty.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY);
- tty.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP);
- tcsetattr(0, TCSANOW, &tty);
+/*
+ * Make sure to have an own session and controlling terminal
+ */
+static
+void setup(struct console *con)
+{
+ pid_t pid, pgrp, ppgrp, ttypgrp;
+ int fd;
+
+ if (con->flags & CON_NOTTY)
+ return;
+ fd = con->fd;
+
+ /*
+ * Only go through this trouble if the new
+ * tty doesn't fall in this process group.
+ */
+ pid = getpid();
+ pgrp = getpgid(0);
+ ppgrp = getpgid(getppid());
+ ttypgrp = tcgetpgrp(fd);
+
+ if (pgrp != ttypgrp && ppgrp != ttypgrp) {
+ if (pid != getsid(0)) {
+ if (pid == getpgid(0))
+ setpgid(0, getpgid(getppid()));
+ setsid();
+ }
- pass[sizeof(pass) - 1] = 0;
+ signal(SIGHUP, SIG_IGN);
+ if (ttypgrp > 0)
+ ioctl(0, TIOCNOTTY, (char *)1);
+ signal(SIGHUP, saved_sighup);
+ if (fd > 0) close(0);
+ if (fd > 1) close(1);
+ if (fd > 2) close(2);
+
+ ioctl(fd, TIOCSCTTY, (char *)1);
+ tcsetpgrp(fd, ppgrp);
+ }
+ dup2(fd, 0);
+ dup2(fd, 1);
+ dup2(fd, 2);
+ con->fd = 0;
+
+ for (fd = 3; fd < 32; fd++) {
+ if (openfd & (1<<fd)) {
+ close(fd);
+ openfd &= ~(1<<fd);
+ }
+ }
+}
+
+/*
+ * Fetch the password. Note that there is no
+ * default timeout as we normally skip this during boot.
+ */
+static
+char *getpasswd(struct console *con)
+{
+ static char pass[128], *ptr;
+ struct sigaction sa;
+ struct chardata *cp;
+ struct termios tty;
+ char *ret = pass;
+ unsigned char tc;
+ char ascval;
+ int eightbit;
+ int c, fd;
+
+ if (con->flags & CON_NOTTY)
+ goto out;
+ fd = con->fd;
+ cp = &con->cp;
+
+ tty = con->tio;
+ tty.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY);
+ tty.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP|ISIG);
+ tc = (tcsetattr(fd, TCSAFLUSH, &tty) == 0);
sa.sa_handler = alrm_handler;
sa.sa_flags = 0;
sigaction(SIGALRM, &sa, NULL);
if (timeout) alarm(timeout);
- if (read(0, pass, sizeof(pass) - 1) <= 0)
- ret = NULL;
- else {
- for(i = 0; i < (int)sizeof(pass) && pass[i]; i++)
- if (pass[i] == '\r' || pass[i] == '\n') {
- pass[i] = 0;
+ ptr = &pass[0];
+ cp->eol = *ptr = '\0';
+
+ eightbit = ((con->flags & CON_SERIAL) == 0 || (tty.c_cflag & (PARODD|PARENB)) == 0);
+ while (cp->eol == '\0') {
+ if (read(fd, &c, 1) < 1) {
+ if (errno == EINTR || errno == EAGAIN) {
+ usleep(1000);
+ continue;
+ }
+ ret = (char*)0;
+ switch (errno) {
+ case 0:
+ case EIO:
+ case ESRCH:
+ case EINVAL:
+ case ENOENT:
break;
+ default:
+ fprintf(stderr, "sulogin: read(%s): %m\n\r", con->tty);
+ break;
+ }
+ goto quit;
+ }
+
+ if (eightbit)
+ ascval = c;
+ else if (c != (ascval = (c & 0177))) {
+ uint32_t bits, mask;
+ for (bits = 1, mask = 1; mask & 0177; mask <<= 1) {
+ if (mask & ascval)
+ bits++;
+ }
+ cp->parity |= ((bits & 1) ? 1 : 2);
+ }
+
+ switch (ascval) {
+ case 0:
+ *ptr = '\0';
+ goto quit;
+ case CR:
+ case NL:
+ *ptr = '\0';
+ cp->eol = ascval;
+ break;
+ case BS:
+ case CERASE:
+ cp->erase = ascval;
+ if (ptr > &pass[0])
+ ptr--;
+ break;
+ case CKILL:
+ cp->kill = ascval;
+ while (ptr > &pass[0])
+ ptr--;
+ break;
+ case CEOF:
+ goto quit;
+ default:
+ if ((size_t)(ptr - &pass[0]) >= (sizeof(pass) -1 )) {
+ fprintf(stderr, "sulogin: input overrun at %s\n\r", con->tty);
+ ret = (char*)0;
+ goto quit;
}
+ *ptr++ = ascval;
+ break;
+ }
}
+quit:
alarm(0);
- tcsetattr(0, TCSANOW, &old);
- printf("\n");
-
+ if (tc)
+ (void)tcsetattr(fd, TCSAFLUSH, &con->tio);
+ if (ret && *ret != '\0')
+ tcfinal(con);
+ printf("\r\n");
+out:
return ret;
}
@@ -411,7 +725,10 @@ void sushell(struct passwd *pwd)
/*
* Set directory and shell.
*/
- (void)chdir(pwd->pw_dir);
+ if (chdir(pwd->pw_dir) < 0) {
+ if (chdir("/") < 0)
+ fprintf(stderr, "sulogin: change of working directory failed: %m\n\r");
+ }
if ((p = getenv("SUSHELL")) != NULL)
sushell = p;
else if ((p = getenv("sushell")) != NULL)
@@ -431,7 +748,8 @@ void sushell(struct passwd *pwd)
/*
* Set some important environment variables.
*/
- getcwd(home, sizeof(home));
+ if (getcwd(home, sizeof(home)) == (char*)0)
+ strcpy(home, "/");
setenv("HOME", home, 1);
setenv("LOGNAME", "root", 1);
setenv("USER", "root", 1);
@@ -445,17 +763,18 @@ void sushell(struct passwd *pwd)
signal(SIGINT, saved_sigint);
signal(SIGTSTP, saved_sigtstp);
signal(SIGQUIT, saved_sigquit);
+ signal(SIGHUP, SIG_DFL);
#ifdef WITH_SELINUX
if (is_selinux_enabled() > 0) {
- security_context_t scon=NULL;
- char *seuser=NULL;
- char *level=NULL;
- if (getseuserbyname("root", &seuser, &level) == 0)
- if (get_default_context_with_level(seuser, level, 0, &scon) == 0) {
- if (setexeccon(scon) != 0)
- fprintf(stderr, "setexeccon faile\n");
- freecon(scon);
- }
+ security_context_t scon=NULL;
+ char *seuser=NULL;
+ char *level=NULL;
+ if (getseuserbyname("root", &seuser, &level) == 0)
+ if (get_default_context_with_level(seuser, level, 0, &scon) == 0) {
+ if (setexeccon(scon) != 0)
+ fprintf(stderr, "sulogin: setexeccon failed\n\r");
+ freecon(scon);
+ }
free(seuser);
free(level);
}
@@ -474,23 +793,72 @@ void sushell(struct passwd *pwd)
perror(STATICSH);
}
+#ifdef __linux__
+/*
+ * Make C library standard calls like ttyname(3) work.
+ */
+static uint32_t mounts;
+#define MNT_PROCFS 0x0001
+#define MNT_DEVTMPFS 0x0002
+
+static __attribute__((__noinline__))
+void putmounts(void)
+{
+ if (mounts & MNT_DEVTMPFS)
+ umount2("/dev", MNT_DETACH);
+ if (mounts & MNT_PROCFS)
+ umount2("/proc", MNT_DETACH);
+}
+
+static __attribute__((__constructor__))
+void getmounts(void)
+{
+ struct statfs st;
+ if (statfs("/proc", &st) == 0 && st.f_type != PROC_SUPER_MAGIC) {
+ if (mount("proc", "/proc", "proc", MS_RELATIME, NULL) == 0)
+ mounts |= MNT_PROCFS;
+ }
+ if (statfs("/dev", &st) == 0 && st.f_type != TMPFS_MAGIC) {
+ if (mount("devtmpfs", "/dev", "devtmpfs", MS_RELATIME, "mode=0755,nr_inodes=0") == 0) {
+ mounts |= MNT_DEVTMPFS;
+ (void)mknod("/dev/console", S_IFCHR|S_IRUSR|S_IWUSR, makedev(TTYAUX_MAJOR, 1));
+ if (symlink("/proc/self/fd", "/dev/fd") == 0) {
+ dovoid(symlink("fd/0", "/dev/stdin"));
+ dovoid(symlink("fd/1", "/dev/stdout"));
+ dovoid(symlink("fd/2", "/dev/stderr"));
+ }
+ }
+ }
+ if (mounts) atexit(putmounts);
+}
+#endif
+
static
void usage(void)
{
- fprintf(stderr, "Usage: sulogin [-e] [-p] [-t timeout] [tty device]\n");
+ fprintf(stderr, "Usage: sulogin [-e] [-p] [-t timeout] [tty device]\n\r");
}
int main(int argc, char **argv)
{
char *tty = NULL;
- char *p;
struct passwd *pwd;
- int c, fd = -1;
+ int c, status = 0;
+ int reconnect = 0;
int opt_e = 0;
- pid_t pid, pgrp, ppgrp, ttypgrp;
+ struct console *con;
+ pid_t pid;
+
+ /*
+ * We are init. We hence need to set uo a session.
+ */
+ if ((pid = getpid()) == 1) {
+ setsid();
+ (void)ioctl(0, TIOCSCTTY, (char *)1);
+ }
/*
- * See if we have a timeout flag.
+ * See if we have a timeout flag.
*/
opterr = 0;
while((c = getopt(argc, argv, "ept:")) != EOF) switch(c) {
@@ -510,115 +878,151 @@ int main(int argc, char **argv)
}
if (geteuid() != 0) {
- fprintf(stderr, "sulogin: only root can run sulogin.\n");
+ fprintf(stderr, "sulogin: only root can run sulogin.\n\r");
exit(1);
}
- /*
- * See if we need to open an other tty device.
- */
saved_sigint = signal(SIGINT, SIG_IGN);
saved_sigquit = signal(SIGQUIT, SIG_IGN);
saved_sigtstp = signal(SIGTSTP, SIG_IGN);
- if (optind < argc) tty = argv[optind];
-
- if (tty || (tty = getenv("CONSOLE"))) {
+ saved_sighup = signal(SIGHUP, SIG_IGN);
- if ((fd = open(tty, O_RDWR)) < 0) {
- perror(tty);
- fd = dup(0);
- }
-
- if (!isatty(fd)) {
- fprintf(stderr, "%s: not a tty\n", tty);
- close(fd);
- } else {
+ /*
+ * See if we need to open an other tty device.
+ */
+ if (optind < argc)
+ tty = argv[optind];
+ if (!tty || *tty == '\0')
+ tty = getenv("CONSOLE");
- /*
- * Only go through this trouble if the new
- * tty doesn't fall in this process group.
- */
- pid = getpid();
- pgrp = getpgid(0);
- ppgrp = getpgid(getppid());
- ttypgrp = tcgetpgrp(fd);
-
- if (pgrp != ttypgrp && ppgrp != ttypgrp) {
- if (pid != getsid(0)) {
- if (pid == getpgid(0))
- setpgid(0, getpgid(getppid()));
- setsid();
- }
+ /*
+ * Detect possible consoles, use stdin as fallback.
+ * If an optional tty is given, reconnect it to stdin.
+ */
+ reconnect = detect_consoles(tty, 0);
- signal(SIGHUP, SIG_IGN);
- if (ttypgrp > 0)
- ioctl(0, TIOCNOTTY, (char *)1);
- signal(SIGHUP, SIG_DFL);
- close(0);
- close(1);
- close(2);
- if (fd > 2)
- close(fd);
- if ((fd = open(tty, O_RDWR|O_NOCTTY)) < 0) {
- perror(tty);
- } else {
- ioctl(0, TIOCSCTTY, (char *)1);
- tcsetpgrp(fd, ppgrp);
- dup2(fd, 0);
- dup2(fd, 1);
- dup2(fd, 2);
- if (fd > 2)
- close(fd);
- }
- } else
- if (fd > 2)
- close(fd);
- }
- } else if (getpid() == 1) {
- /* We are init. We hence need to set a session anyway */
- setsid();
- if (ioctl(0, TIOCSCTTY, (char *)1))
- perror("ioctl(TIOCSCTTY)");
+ /*
+ * Should not happen
+ */
+ if (!consoles) {
+ if (!errno)
+ errno = ENOMEM;
+ fprintf(stderr, "sulogin: cannot open console: %m\n\r");
+ exit(1);
}
-#if defined(SANE_TIO) && (SANE_TIO == 1)
- fixtty();
-#endif
+ /*
+ * If previous stdin was not the speified tty and therefore reconnected
+ * to the specified tty also reconnect stdout and stderr.
+ */
+ if (reconnect) {
+ if (isatty(1) == 0)
+ dup2(0, 1);
+ if (isatty(2) == 0)
+ dup2(0, 2);
+ }
/*
* Get the root password.
*/
if ((pwd = getrootpwent(opt_e)) == NULL) {
- fprintf(stderr, "sulogin: cannot open password database!\n");
+ fprintf(stderr, "sulogin: cannot open password database!\n\r");
sleep(2);
}
/*
- * Ask for the password.
+ * Prompt for input on the consoles
*/
- while(pwd) {
- int failed = 0;
- if ((p = getpasswd(pwd->pw_passwd)) == NULL) break;
- if (pwd->pw_passwd[0] == 0 ||
- strcmp(crypt(p, pwd->pw_passwd), pwd->pw_passwd) == 0) {
- sushell(pwd);
- failed++;
+ for (con = consoles; con && con->id < CONMAX; con = con->next) {
+ if (con->fd >= 0) {
+ openfd |= (1<<con->fd);
+ tcinit(con);
+ continue;
}
- signal(SIGQUIT, SIG_IGN);
- signal(SIGTSTP, SIG_IGN);
- signal(SIGINT, SIG_IGN);
- if (failed) {
- printf("Can not execute su shell.\n");
- break;
- } else
- printf("Login incorrect.\n");
+ if ((con->fd = open(con->tty, O_RDWR | O_NOCTTY | O_NONBLOCK)) < 0)
+ continue;
+ openfd |= (1<<con->fd);
+ tcinit(con);
}
+ con = consoles;
+ usemask = (uint32_t*)mmap(NULL, sizeof(uint32_t), PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_SHARED, -1, 0);
- if (alarm_rised)
- printf("Timed out.\n");
+ if (con->next == (struct console*)0)
+ goto nofork;
+
+ signal(SIGCHLD, chld_handler);
+ do {
+ switch ((con->pid = fork())) {
+ case 0:
+ signal(SIGCHLD, SIG_DFL);
+ /* fall through */
+ nofork:
+ setup(con);
+ while (1) {
+ char *passwd = pwd->pw_passwd;
+ char *answer;
+ int failed = 0;
+
+ doprompt(passwd, con);
+ if ((answer = getpasswd(con)) == NULL)
+ break;
+
+ if (passwd[0] == '\0' ||
+ strcmp(crypt(answer, passwd), passwd) == 0) {
+ *usemask |= (1<<con->id);
+ sushell(pwd);
+ *usemask &= ~(1<<con->id);
+ failed++;
+ }
+ signal(SIGQUIT, SIG_IGN);
+ signal(SIGTSTP, SIG_IGN);
+ signal(SIGINT, SIG_IGN);
+
+ if (failed) {
+ fprintf(stderr, "sulogin: can not execute su shell.\n\r");
+ break;
+ }
+ fprintf(stderr, "Login incorrect.\n\r");
+ sleep(3);
+ }
+ if (alarm_rised) {
+ tcfinal(con);
+ printf("Timed out.\n\r");
+ }
+ /*
+ * User may pressed Control-D.
+ */
+ exit(0);
+ case -1:
+ fprintf(stderr, "sulogin: can not fork: %m\n\r");
+ /* fall through */
+ default:
+ break;
+ }
+ } while ((con = con->next) && (con->id < CONMAX));
+
+ while ((pid = wait(&status))) {
+ if (errno == ECHILD)
+ break;
+ if (pid < 0)
+ continue;
+ for (con = consoles; con && con->id < CONMAX; con = con->next) {
+ if (con->pid == pid) {
+ *usemask &= ~(1<<con->id);
+ continue;
+ }
+ if (kill(con->pid, 0) < 0) {
+ *usemask &= ~(1<<con->id);
+ continue;
+ }
+ if (*usemask & (1<<con->id))
+ continue;
+ kill(con->pid, SIGHUP);
+ usleep(5000);
+ kill(con->pid, SIGKILL);
+ }
+ }
+ signal(SIGCHLD, SIG_DFL);
- /*
- * User may pressed Control-D.
- */
return 0;
}
--- src/consoles.c
+++ src/consoles.c 2011-07-26 12:17:30.139926327 +0200
@@ -27,9 +27,21 @@
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <sys/ioctl.h>
+#ifdef __linux__
+# include <sys/vt.h>
+# include <sys/kd.h>
+# include <linux/serial.h>
+#endif
+#include <fcntl.h>
#include <dirent.h>
+#include <unistd.h>
#include "consoles.h"
+#ifdef __linux__
+# include <linux/major.h>
+#endif
+
#if !defined(__STDC_VERSION__) || (__STDC_VERSION__ < 199901L)
# ifndef typeof
# define typeof __typeof__
@@ -43,8 +55,100 @@
struct console *consoles;
+/*
+ * Read and allocate one line from file,
+ * the caller has to free the result
+ */
+static
+#ifdef __GNUC__
+__attribute__((__nonnull__))
+#endif
+char *oneline(const char *file)
+{
+ FILE *fp;
+ char *ret = (char*)0, *nl;
+ size_t len = 0;
+
+ if ((fp = fopen(file, "re")) == (FILE*)0)
+ goto err;
+ if (getline(&ret, &len, fp) < 0)
+ goto out;
+ if (len)
+ ret[len-1] = '\0';
+ if ((nl = strchr(ret, '\n')))
+ *nl = '\0';
+out:
+ fclose(fp);
+err:
+ return ret;
+}
+
+#ifdef __linux__
+/*
+ * Read and determine active attribute for tty below
+ * /sys/class/tty, the caller has to free the result.
+ */
+static
+__attribute__((__malloc__))
+char *actattr(const char *tty)
+{
+ char *ret = (char*)0;
+ char *path;
+
+ if (!tty || *tty == '\0')
+ goto err;
+
+ if (asprintf(&path, "/sys/class/tty/%s/active", tty) < 0)
+ goto err;
+
+ if ((ret = oneline(path)) == (char*)0)
+ goto out;
+out:
+ free(path);
+err:
+ return ret;
+}
+
+/*
+ * Read and determine device attribute for tty below
+ * /sys/class/tty.
+ */
+static
+dev_t devattr(const char *tty)
+{
+ unsigned int maj, min;
+ dev_t dev = 0;
+ char *path, *value;
+
+ if (!tty || *tty == '\0')
+ goto err;
+
+ if (asprintf(&path, "/sys/class/tty/%s/dev", tty) < 0)
+ goto err;
+
+ if ((value = oneline(path)) == (char*)0)
+ goto out;
+
+ if (sscanf(value, "%u:%u", &maj, &min) == 2)
+ dev = makedev(maj, min);
+ free(value);
+out:
+ free(path);
+err:
+ return dev;
+}
+#endif /* __linux__ */
+
+/*
+ * Search below /dev for the characer device in
+ * the local `dev_t comparedev' variable.
+ */
static dev_t comparedev;
-static char* scandev(DIR *dir)
+static
+#ifdef __GNUC__
+__attribute__((__nonnull__,__malloc__,__hot__))
+#endif
+char* scandev(DIR *dir)
{
char *name = (char*)0;
struct dirent *dent;
@@ -69,41 +173,335 @@ static char* scandev(DIR *dir)
return name;
}
-void detect_consoles(void)
+/*
+ * Default control characters for an unknown terminal line.
+ */
+static
+struct chardata initcp = {
+ CERASE,
+ CKILL,
+ CTRL('r'),
+ 0
+};
+
+/*
+ * Allocate an aligned `struct console' memory area,
+ * initialize its default values, and append it to
+ * the global linked list.
+ */
+
+static int concount; /* Counter for console IDs */
+
+static
+#ifdef __GNUC__
+__attribute__((__nonnull__,__hot__))
+#endif
+void consalloc(char * name)
{
+ struct console *restrict tail;
+
+ if (posix_memalign((void*)&tail, sizeof(void*), alignof(typeof(struct console))) != 0)
+ perror("memory allocation");
+
+ tail->next = (struct console*)0;
+ tail->tty = name;
+
+ tail->file = (FILE*)0;
+ tail->flags = 0;
+ tail->fd = -1;
+ tail->id = concount++;
+ tail->pid = 0;
+ memset(&tail->tio, 0, sizeof(tail->tio));
+ memcpy(&tail->cp, &initcp, sizeof(struct chardata));
+
+ if (!consoles)
+ consoles = tail;
+ else
+ consoles->next = tail;
+}
+
+/*
+ * Try to detect the real device(s) used for the system console
+ * /dev/console if but only if /dev/console is used. On Linux
+ * this can be more than one device, e.g. a serial line as well
+ * as a virtual console as well as a simple printer.
+ *
+ * Returns 1 if stdout and stderr should be reconnected and 0
+ * otherwise.
+ */
+int detect_consoles(const char *device, int fallback)
+{
+ int fd, ret = 0;
+#ifdef __linux__
+ char *attrib, *cmdline;
FILE *fc;
- if ((fc = fopen("/proc/consoles", "r"))) {
+#endif
+ if (!device || *device == '\0')
+ fd = dup(fallback);
+ else {
+ fd = open(device, O_RDWR|O_NONBLOCK|O_NOCTTY|O_CLOEXEC);
+ ret = 1;
+ }
+
+ if (fd >= 0) {
+ DIR *dir;
+ char *name;
+ struct stat st;
+#ifdef TIOCGDEV
+ unsigned int devnum;
+#endif
+
+ if (fstat(fd, &st) < 0) {
+ close(fd);
+ goto fallback;
+ }
+ comparedev = st.st_rdev;
+
+ if (ret && (fstat(fallback, &st) < 0 || comparedev != st.st_rdev))
+ dup2(fd, fallback);
+#ifdef __linux__
+ /*
+ * Check if the device detection for Linux system console should be used.
+ */
+ if (comparedev == makedev(TTYAUX_MAJOR, 0)) { /* /dev/tty */
+ close(fd);
+ device = "/dev/tty";
+ goto fallback;
+ }
+ if (comparedev == makedev(TTYAUX_MAJOR, 1)) { /* /dev/console */
+ close(fd);
+ goto console;
+ }
+ if (comparedev == makedev(TTYAUX_MAJOR, 2)) { /* /dev/ptmx */
+ close(fd);
+ device = "/dev/tty";
+ goto fallback;
+ }
+ if (comparedev == makedev(TTY_MAJOR, 0)) { /* /dev/tty0 */
+ struct vt_stat vt;
+ if (ioctl(fd, VT_GETSTATE, &vt) < 0) {
+ close(fd);
+ goto fallback;
+ }
+ comparedev = makedev(TTY_MAJOR, (int)vt.v_active);
+ }
+#endif
+#ifdef TIOCGDEV
+ if (ioctl (fd, TIOCGDEV, &devnum) < 0) {
+ close(fd);
+ goto fallback;
+ }
+ comparedev = (dev_t)devnum;
+#endif
+ close(fd);
+ dir = opendir("/dev");
+ if (!dir)
+ goto fallback;
+ name = scandev(dir);
+ if (name)
+ consalloc(name);
+ closedir(dir);
+ if (!consoles)
+ goto fallback;
+ return ret;
+ }
+#ifdef __linux__
+console:
+ /*
+ * Detection of devices used for Linux system consolei using
+ * the /proc/consoles API with kernel 2.6.38 and higher.
+ */
+ if ((fc = fopen("/proc/consoles", "re"))) {
char fbuf[16];
int maj, min;
DIR *dir;
dir = opendir("/dev");
- if (!dir)
- goto out;
+ if (!dir) {
+ fclose(fc);
+ goto fallback;
+ }
while ((fscanf(fc, "%*s %*s (%[^)]) %d:%d", &fbuf[0], &maj, &min) == 3)) {
- struct console *restrict tail;
char * name;
if (!strchr(fbuf, 'E'))
continue;
comparedev = makedev(maj, min);
+
name = scandev(dir);
+ if (!name)
+ continue;
+ consalloc(name);
+ }
+ closedir(dir);
+ fclose(fc);
+ return ret;
+ }
+ /*
+ * Detection of devices used for Linux system console using
+ * the sysfs /sys/class/tty/ API with kernel 2.6.37 and higher.
+ */
+ if ((attrib = actattr("console"))) {
+ char *words = attrib, *token;
+ DIR *dir;
+
+ dir = opendir("/dev");
+ if (!dir) {
+ free(attrib);
+ goto fallback;
+ }
+ while ((token = strsep(&words, " \t\r\n"))) {
+ char * name;
+
+ if (*token == '\0')
+ continue;
+ comparedev = devattr(token);
+ if (comparedev == makedev(TTY_MAJOR, 0)) {
+ char *tmp = actattr(token);
+ if (!tmp)
+ continue;
+ comparedev = devattr(tmp);
+ free(tmp);
+ }
+ name = scandev(dir);
if (!name)
continue;
+ consalloc(name);
+ }
+ closedir(dir);
+ free(attrib);
+ if (!consoles)
+ goto fallback;
+ return ret;
- if (posix_memalign((void*)&tail, sizeof(void*), alignof(typeof(struct console))) != 0)
- perror("memory allocation");
+ }
+ /*
+ * Detection of devices used for Linux system console using
+ * kernel parameter on the kernels command line.
+ */
+ if ((cmdline = oneline("/proc/cmdline"))) {
+ char *words= cmdline, *token;
+ DIR *dir;
- tail->next = (struct console*)0;
- tail->tty = name;
+ dir = opendir("/dev");
+ if (!dir) {
+ free(cmdline);
+ goto fallback;
+ }
+ while ((token = strsep(&words, " \t\r\n"))) {
+#ifdef TIOCGDEV
+ unsigned int devnum;
+#else
+ struct vt_stat vt;
+ struct stat st;
+#endif
+ char *colon, *name;
- if (!consoles)
- consoles = tail;
- else
- consoles->next = tail;
+ if (*token != 'c')
+ continue;
+
+ if (strncmp(token, "console=", 8) != 0)
+ continue;
+ token += 8;
+
+ if (strcmp(token, "brl") == 0)
+ token += 4;
+ if ((colon = strchr(token, ',')))
+ *colon = '\0';
+
+ if (asprintf(&name, "/dev/%s", token) < 0)
+ continue;
+
+ if ((fd = open(name, O_RDWR|O_NONBLOCK|O_NOCTTY|O_CLOEXEC)) < 0) {
+ free(name);
+ continue;
+ }
+ free(name);
+#ifdef TIOCGDEV
+ if (ioctl (fd, TIOCGDEV, &devnum) < 0) {
+ close(fd);
+ continue;
+ }
+ comparedev = (dev_t)devnum;
+#else
+ if (fstat(fd, &st) < 0) {
+ close(fd);
+ continue;
+ }
+ comparedev = st.st_rdev;
+ if (comparedev == makedev(TTY_MAJOR, 0)) {
+ if (ioctl(fd, VT_GETSTATE, &vt) < 0) {
+ close(fd);
+ continue;
+ }
+ comparedev = makedev(TTY_MAJOR, (int)vt.v_active);
+ }
+#endif
+ close(fd);
+
+ name = scandev(dir);
+ if (!name)
+ continue;
+ consalloc(name);
}
closedir(dir);
-out:
- fclose(fc);
+ free(cmdline);
+ /*
+ * Detection of the device used for Linux system console using
+ * the ioctl TIOCGDEV if available (e.g. official 2.6.38).
+ */
+ if (!consoles) {
+#ifdef TIOCGDEV
+ unsigned int devnum;
+ const char *name;
+
+ if (!device || *device == '\0')
+ fd = dup(fallback);
+ else fd = open(device, O_RDWR|O_NONBLOCK|O_NOCTTY|O_CLOEXEC);
+
+ if (fd < 0)
+ goto fallback;
+
+ if (ioctl (fd, TIOCGDEV, &devnum) < 0) {
+ close(fd);
+ goto fallback;
+ }
+ comparedev = (dev_t)devnum;
+ close(fd);
+
+ if (device && *device != '\0')
+ name = device;
+ else name = ttyname(fallback);
+
+ if (!name)
+ name = "/dev/tty1";
+
+ consalloc(strdup(name));
+ if (consoles) {
+ if (!device || *device == '\0')
+ consoles->fd = fallback;
+ return ret;
+ }
+#endif
+ goto fallback;
+ }
+ return ret;
+ }
+#endif /* __linux __ */
+fallback:
+ if (fallback >= 0) {
+ const char *name;
+
+ if (device && *device != '\0')
+ name = device;
+ else name = ttyname(fallback);
+
+ if (!name)
+ name = "/dev/tty";
+
+ consalloc(strdup(name));
+ if (consoles)
+ consoles->fd = fallback;
}
+ return ret;
}
--- src/consoles.h
+++ src/consoles.h 2011-07-26 11:07:40.273249830 +0200
@@ -21,13 +21,28 @@
* Author: Werner Fink <werner@suse.de>
*/
+#include <sys/types.h>
+#include <stdint.h>
+#include <stdio.h>
#include <termios.h>
+struct chardata {
+ uint8_t erase;
+ uint8_t kill;
+ uint8_t eol;
+ uint8_t parity;
+};
struct console {
- char * tty;
- int tlock;
- struct termios ltio, otio;
+ char *tty;
+ FILE *file;
+ uint32_t flags;
+ int fd, id;
+#define CON_SERIAL 0x0001
+#define CON_NOTTY 0x0002
+ pid_t pid;
+ struct chardata cp;
+ struct termios tio;
struct console *next;
};
extern struct console *consoles;
-extern void detect_consoles(void);
+extern int detect_consoles(const char *, int);
--- src/Makefile
+++ src/Makefile 2010-03-23 15:11:12.000000000 +0000
@@ -112,7 +112,7 @@ utmpdump: utmpdump.o
runlevel: runlevel.o
sulogin: LDLIBS += $(SULOGINLIBS) $(STATIC)
-sulogin: sulogin.o
+sulogin: sulogin.o consoles.o
wall: dowall.o wall.o
Reference in New Issue View Git Blame Copy Permalink