* init - avoid compiler warnings
* init - initialize console by using the macros from ttydefaults.h * init - add the possiblity to ignore further interrupts from keyboard * init - add the possiblity to set sane terminal line settings
This commit is contained in:
Werner Fink
parent
1107f3ba7d
commit
d80bb06fec
@ -13,6 +13,10 @@
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* Retry to write out shutdown messages if interrupted.
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* pidof/killall5 - make omit pid list a dynamic one.
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* pidof - provide '-n' to skip stat(2) syscall on network based FS.
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* init - avoid compiler warnings
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* init - initialize console by using the macros from ttydefaults.h
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* init - add the possiblity to ignore further interrupts from keyboard
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* init - add the possiblity to set sane terminal line settings
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sysvinit (2.88dsf) UNRELEASED; urgency=low
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@ -66,6 +66,7 @@ char *progname;
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extern int ifdown(void);
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extern int hddown(void);
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extern int hdflush(void);
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extern void write_wtmp(char *user, char *id, int pid, int type, char *line);
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/*
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155
src/init.c
155
src/init.c
@ -58,12 +58,14 @@
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#ifdef __i386__
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# if (__GLIBC__ >= 2)
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# ifdef __GLIBC__
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/* GNU libc 2.x */
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# define STACK_DEBUG 1
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# if (__GLIBC__ == 2 && __GLIBC_MINOR__ == 0)
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/* Only glibc 2.0 needs this */
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# include <sigcontext.h>
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# elif ( __GLIBC__ > 2) && ((__GLIBC__ == 2) && (__GLIBC_MINOR__ >= 1))
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# include <bits/sigcontext.h>
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# endif
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# endif
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#endif
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@ -216,6 +218,7 @@ char *extra_env[NR_EXTRA_ENV];
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* This only works correctly because the linux select updates
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* the elapsed time in the struct timeval passed to select!
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*/
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static
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void do_sleep(int sec)
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{
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struct timeval tv;
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@ -231,6 +234,7 @@ void do_sleep(int sec)
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/*
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* Non-failing allocation routines (init cannot fail).
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*/
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static
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void *imalloc(size_t size)
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{
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void *m;
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@ -243,7 +247,7 @@ void *imalloc(size_t size)
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return m;
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}
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static
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char *istrdup(char *s)
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{
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char *m;
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@ -260,6 +264,7 @@ char *istrdup(char *s)
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* Send the state info of the previous running init to
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* the new one, in a version-independant way.
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*/
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static
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void send_state(int fd)
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{
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FILE *fp;
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@ -452,6 +457,7 @@ static CHILD *get_record(FILE *f)
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* Read the complete state info from the state pipe.
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* Returns 0 on success
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*/
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static
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int receive_state(int fd)
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{
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FILE *f;
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@ -499,6 +505,7 @@ static int setproctitle(char *fmt, ...)
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/*
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* Set console_dev to a working console.
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*/
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static
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void console_init(void)
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{
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int fd;
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@ -536,6 +543,7 @@ void console_init(void)
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/*
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* Open the console with retries.
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*/
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static
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int console_open(int mode)
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{
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int f, fd = -1;
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@ -567,6 +575,7 @@ int console_open(int mode)
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/*
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* We got a signal (HUP PWR WINCH ALRM INT)
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*/
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static
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void signal_handler(int sig)
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{
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ADDSET(got_signals, sig);
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@ -575,7 +584,12 @@ void signal_handler(int sig)
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/*
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* SIGCHLD: one of our children has died.
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*/
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void chld_handler()
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static
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# ifdef __GNUC__
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void chld_handler(int sig __attribute__((unused)))
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# else
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void chld_handler(int sig)
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# endif
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{
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CHILD *ch;
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int pid, st;
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@ -615,7 +629,12 @@ void chld_handler()
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*
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* The SIGCONT handler
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*/
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void cont_handler()
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static
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# ifdef __GNUC__
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void cont_handler(int sig __attribute__((unused)))
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# else
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void cont_handler(int sig)
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# endif
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{
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got_cont = 1;
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}
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@ -623,6 +642,7 @@ void cont_handler()
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/*
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* Fork and dump core in /.
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*/
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static
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void coredump(void)
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{
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static int dumped = 0;
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@ -656,8 +676,13 @@ void coredump(void)
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* If we have the info, print where it occured.
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* Then sleep 30 seconds and try to continue.
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*/
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static
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#if defined(STACK_DEBUG) && defined(__linux__)
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# ifdef __GNUC__
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void segv_handler(int sig __attribute__((unused)), struct sigcontext ctx)
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# else
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void segv_handler(int sig, struct sigcontext ctx)
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# endif
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{
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char *p = "";
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int saved_errno = errno;
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@ -672,7 +697,11 @@ void segv_handler(int sig, struct sigcontext ctx)
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errno = saved_errno;
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}
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#else
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void segv_handler()
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# ifdef __GNUC__
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void segv_handler(int sig __attribute__((unused)))
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# else
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void segv_handler(int sig)
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# endif
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{
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int saved_errno = errno;
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@ -687,7 +716,12 @@ void segv_handler()
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/*
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* The SIGSTOP & SIGTSTP handler
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*/
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void stop_handler()
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static
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# ifdef __GNUC__
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void stop_handler(int sig __attribute__((unused)))
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# else
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void stop_handler(int sig)
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# endif
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{
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int saved_errno = errno;
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@ -700,6 +734,7 @@ void stop_handler()
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/*
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* Set terminal settings to reasonable defaults
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*/
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static
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void console_stty(void)
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{
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struct termios tty;
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@ -715,28 +750,43 @@ void console_stty(void)
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tty.c_cflag &= CBAUD|CBAUDEX|CSIZE|CSTOPB|PARENB|PARODD;
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tty.c_cflag |= HUPCL|CLOCAL|CREAD;
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tty.c_cc[VINTR] = 3; /* ctrl('c') */
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tty.c_cc[VQUIT] = 28; /* ctrl('\\') */
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tty.c_cc[VERASE] = 127;
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tty.c_cc[VKILL] = 24; /* ctrl('x') */
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tty.c_cc[VEOF] = 4; /* ctrl('d') */
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tty.c_cc[VINTR] = CINTR;
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tty.c_cc[VQUIT] = CQUIT;
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tty.c_cc[VERASE] = CERASE; /* ASCII DEL (0177) */
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tty.c_cc[VKILL] = CKILL;
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tty.c_cc[VEOF] = CEOF;
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tty.c_cc[VTIME] = 0;
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tty.c_cc[VMIN] = 1;
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tty.c_cc[VSTART] = 17; /* ctrl('q') */
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tty.c_cc[VSTOP] = 19; /* ctrl('s') */
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tty.c_cc[VSUSP] = 26; /* ctrl('z') */
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tty.c_cc[VSWTC] = _POSIX_VDISABLE;
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tty.c_cc[VSTART] = CSTART;
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tty.c_cc[VSTOP] = CSTOP;
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tty.c_cc[VSUSP] = CSUSP;
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tty.c_cc[VEOL] = _POSIX_VDISABLE;
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tty.c_cc[VREPRINT] = CREPRINT;
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tty.c_cc[VDISCARD] = CDISCARD;
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tty.c_cc[VWERASE] = CWERASE;
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tty.c_cc[VLNEXT] = CLNEXT;
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tty.c_cc[VEOL2] = _POSIX_VDISABLE;
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/*
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* Set pre and post processing
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*/
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tty.c_iflag = IGNPAR|ICRNL|IXON|IXANY
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tty.c_iflag = IGNPAR|ICRNL|IXON|IXANY;
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#ifdef IUTF8 /* Not defined on FreeBSD */
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| (tty.c_iflag & IUTF8)
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tty.c_iflag |= IUTF8;
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#endif /* IUTF8 */
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;
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tty.c_oflag = OPOST|ONLCR;
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tty.c_lflag = ISIG|ICANON|ECHO|ECHOCTL|ECHOPRT|ECHOKE;
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#if defined(SANE_TIO) && (SANE_TIO == 1)
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/*
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* Disable flow control (-ixon), ignore break (ignbrk),
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* and make nl/cr more usable (sane).
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*/
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tty.c_iflag |= IGNBRK;
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tty.c_iflag &= ~(BRKINT|INLCR|IGNCR|IXON);
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tty.c_oflag &= ~(OCRNL|ONLRET);
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#endif
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/*
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* Now set the terminal line.
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* We don't care about non-transmitted output data
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@ -808,6 +858,7 @@ char **init_buildenv(int child)
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char i_lvl[] = "RUNLEVEL=x";
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char i_prev[] = "PREVLEVEL=x";
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char i_cons[32];
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char i_shell[] = "SHELL=" SHELL;
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char **e;
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int n, i;
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@ -827,6 +878,7 @@ char **init_buildenv(int child)
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snprintf(i_cons, sizeof(i_cons), "CONSOLE=%s", console_dev);
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i_lvl[9] = thislevel;
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i_prev[10] = prevlevel;
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e[n++] = istrdup(i_shell);
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e[n++] = istrdup(i_lvl);
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e[n++] = istrdup(i_prev);
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e[n++] = istrdup(i_cons);
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@ -855,6 +907,7 @@ void init_freeenv(char **e)
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* This function is too long and indents too deep.
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*
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*/
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static
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int spawn(CHILD *ch, int *res)
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{
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char *args[16]; /* Argv array */
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@ -1121,6 +1174,7 @@ int spawn(CHILD *ch, int *res)
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/*
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* Start a child running!
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*/
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static
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void startup(CHILD *ch)
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{
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/*
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@ -1155,6 +1209,7 @@ void startup(CHILD *ch)
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/*
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* Read the inittab file.
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*/
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static
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void read_inittab(void)
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{
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FILE *fp; /* The INITTAB file */
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@ -1535,6 +1590,7 @@ void read_inittab(void)
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* The entries that do not belong here at all are removed
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* from the list.
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*/
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static
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void start_if_needed(void)
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{
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CHILD *ch; /* Pointer to child */
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@ -1580,6 +1636,7 @@ void start_if_needed(void)
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/*
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* Ask the user on the console for a runlevel
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*/
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static
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int ask_runlevel(void)
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{
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const char prompt[] = "\nEnter runlevel: ";
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@ -1608,6 +1665,7 @@ int ask_runlevel(void)
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* Search the INITTAB file for the 'initdefault' field, with the default
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* runlevel. If this fails, ask the user to supply a runlevel.
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*/
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static
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int get_init_default(void)
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{
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CHILD *ch;
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@ -1656,6 +1714,7 @@ int get_init_default(void)
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* the "old" INITLVL and arg == 0, try to read the new
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* runlevel from that file first.
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*/
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static
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int read_level(int arg)
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{
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CHILD *ch; /* Walk through list */
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@ -1724,7 +1783,14 @@ int read_level(int arg)
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initlog(L_VB, "Switching to runlevel: %c", foo);
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}
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if (foo == 'Q') return runlevel;
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if (foo == 'Q') {
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#if defined(SIGINT_ONLYONCE) && (SIGINT_ONLYONCE == 1)
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/* Re-enable signal from keyboard */
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struct sigaction sa;
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SETSIG(sa, SIGINT, signal_handler, 0);
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#endif
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return runlevel;
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}
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/* Check if this is a runlevel a, b or c */
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if (strchr("ABC", foo)) {
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@ -1763,6 +1829,7 @@ int read_level(int arg)
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* longer than 5 minutes, or inittab was read again due
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* to user interaction.
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*/
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static
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void fail_check(void)
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{
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CHILD *ch; /* Pointer to child structure */
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@ -1795,6 +1862,7 @@ void fail_check(void)
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}
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/* Set all 'Fail' timers to 0 */
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static
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void fail_cancel(void)
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{
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CHILD *ch;
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@ -1809,6 +1877,7 @@ void fail_cancel(void)
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/*
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* Start up powerfail entries.
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*/
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static
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void do_power_fail(int pwrstat)
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{
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CHILD *ch;
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@ -1842,6 +1911,7 @@ void do_power_fail(int pwrstat)
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/*
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* Check for state-pipe presence
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*/
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static
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int check_pipe(int fd)
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{
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struct timeval t;
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@ -1862,6 +1932,7 @@ int check_pipe(int fd)
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/*
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* Make a state-pipe.
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*/
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static
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int make_pipe(int fd)
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{
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int fds[2];
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@ -1879,6 +1950,7 @@ int make_pipe(int fd)
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/*
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* Attempt to re-exec.
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*/
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static
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void re_exec(void)
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{
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CHILD *ch;
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@ -1973,6 +2045,7 @@ void redo_utmp_wtmp(void)
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* We got a change runlevel request through the
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* init.fifo. Process it.
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*/
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static
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void fifo_new_level(int level)
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{
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#if CHANGE_WAIT
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@ -2002,7 +2075,7 @@ void fifo_new_level(int level)
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if (runlevel > '1' && runlevel < '6') redo_utmp_wtmp();
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read_inittab();
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fail_cancel();
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setproctitle("init [%c]", runlevel);
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setproctitle("init [%c]", (int)runlevel);
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}
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}
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}
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@ -2013,6 +2086,7 @@ void fifo_new_level(int level)
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* encoded as KEY=VAL\0KEY=VAL\0\0. With "=VAL" it means
|
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* setenv, without it means unsetenv.
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*/
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static
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void initcmd_setenv(char *data, int size)
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{
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char *env, *p, *e, *eq;
|
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@ -2070,6 +2144,7 @@ void initcmd_setenv(char *data, int size)
|
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* the 2.2 kernel credential stuff to see who we're talking to.
|
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*
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*/
|
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static
|
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void check_init_fifo(void)
|
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{
|
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struct init_request request;
|
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@ -2212,6 +2287,7 @@ void check_init_fifo(void)
|
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* This function is used in the transition
|
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* sysinit (-> single user) boot -> multi-user.
|
||||
*/
|
||||
static
|
||||
void boot_transitions()
|
||||
{
|
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CHILD *ch;
|
||||
@ -2288,7 +2364,7 @@ void boot_transitions()
|
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write_utmp_wtmp("runlevel", "~~", runlevel + 256 * oldlevel, RUN_LVL, "~");
|
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thislevel = runlevel;
|
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prevlevel = oldlevel;
|
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setproctitle("init [%c]", runlevel);
|
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setproctitle("init [%c]", (int)runlevel);
|
||||
}
|
||||
}
|
||||
}
|
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@ -2297,6 +2373,7 @@ void boot_transitions()
|
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* Init got hit by a signal. See which signal it is,
|
||||
* and act accordingly.
|
||||
*/
|
||||
static
|
||||
void process_signals()
|
||||
{
|
||||
CHILD *ch;
|
||||
@ -2321,6 +2398,11 @@ void process_signals()
|
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}
|
||||
|
||||
if (ISMEMBER(got_signals, SIGINT)) {
|
||||
#if defined(SIGINT_ONLYONCE) && (SIGINT_ONLYONCE == 1)
|
||||
/* Ignore any further signal from keyboard */
|
||||
struct sigaction sa;
|
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SETSIG(sa, SIGINT, SIG_IGN, SA_RESTART);
|
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#endif
|
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INITDBG(L_VB, "got SIGINT");
|
||||
/* Tell ctrlaltdel entry to start up */
|
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for(ch = family; ch; ch = ch->next)
|
||||
@ -2383,7 +2465,7 @@ void process_signals()
|
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runlevel == '1') console_stty();
|
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read_inittab();
|
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fail_cancel();
|
||||
setproctitle("init [%c]", runlevel);
|
||||
setproctitle("init [%c]", (int)runlevel);
|
||||
DELSET(got_signals, SIGHUP);
|
||||
}
|
||||
}
|
||||
@ -2402,7 +2484,8 @@ void process_signals()
|
||||
/*
|
||||
* The main loop
|
||||
*/
|
||||
int init_main()
|
||||
static
|
||||
void init_main(void)
|
||||
{
|
||||
CHILD *ch;
|
||||
struct sigaction sa;
|
||||
@ -2562,12 +2645,14 @@ int init_main()
|
||||
/*
|
||||
* Tell the user about the syntax we expect.
|
||||
*/
|
||||
static
|
||||
void usage(char *s)
|
||||
{
|
||||
fprintf(stderr, "Usage: %s {-e VAR[=VAL] | [-t SECONDS] {0|1|2|3|4|5|6|S|s|Q|q|A|a|B|b|C|c|U|u}}\n", s);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
static
|
||||
int telinit(char *progname, int argc, char **argv)
|
||||
{
|
||||
#ifdef TELINIT_USES_INITLVL
|
||||
@ -2619,12 +2704,28 @@ int telinit(char *progname, int argc, char **argv)
|
||||
request.sleeptime = sltime;
|
||||
}
|
||||
|
||||
/* Change to the root directory. */
|
||||
chdir("/");
|
||||
|
||||
/* Open the fifo and write a command. */
|
||||
/* Make sure we don't hang on opening /dev/initctl */
|
||||
SETSIG(sa, SIGALRM, signal_handler, 0);
|
||||
alarm(3);
|
||||
if ((fd = open(INIT_FIFO, O_WRONLY)) >= 0 &&
|
||||
write(fd, &request, sizeof(request)) == sizeof(request)) {
|
||||
if ((fd = open(INIT_FIFO, O_WRONLY)) >= 0) {
|
||||
ssize_t p = 0;
|
||||
size_t s = sizeof(request);
|
||||
void *ptr = &request;
|
||||
|
||||
while (s > 0) {
|
||||
p = write(fd, ptr, s);
|
||||
if (p < 0) {
|
||||
if (errno == EINTR || errno == EAGAIN)
|
||||
continue;
|
||||
break;
|
||||
}
|
||||
ptr += p;
|
||||
s -= p;
|
||||
}
|
||||
close(fd);
|
||||
alarm(0);
|
||||
return 0;
|
||||
@ -2677,6 +2778,8 @@ int main(int argc, char **argv)
|
||||
p++;
|
||||
else
|
||||
p = argv[0];
|
||||
|
||||
/* Common umask */
|
||||
umask(022);
|
||||
|
||||
/* Quick check */
|
||||
@ -2710,7 +2813,7 @@ int main(int argc, char **argv)
|
||||
for (f = 0; f < argc; f++)
|
||||
maxproclen += strlen(argv[f]) + 1;
|
||||
reload = 1;
|
||||
setproctitle("init [%c]",runlevel);
|
||||
setproctitle("init [%c]", (int)runlevel);
|
||||
|
||||
init_main();
|
||||
}
|
||||
@ -2754,7 +2857,7 @@ int main(int argc, char **argv)
|
||||
argv0 = argv[0];
|
||||
argv[1] = NULL;
|
||||
setproctitle("init boot");
|
||||
init_main(dfl_level);
|
||||
init_main();
|
||||
|
||||
/*NOTREACHED*/
|
||||
return 0;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user