c281867f46
Relocated some syslib functions to utils library; Changed location of 'Multiuser startup ..." echo in /etc/rc
305 lines
6.5 KiB
C
305 lines
6.5 KiB
C
/*
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inet/inet_config.c
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Created: Nov 11, 1992 by Philip Homburg
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Modified: Apr 07, 2001 by Kees J. Bot
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Read the configuration file and fill in the xx_conf[] arrays.
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Copyright 1995 Philip Homburg
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*/
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#define _MINIX 1
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#include <stdlib.h>
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#include <fcntl.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <minix/config.h>
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#include <minix/type.h>
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#include <minix/syslib.h>
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#include <minix/utils.h>
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#include <unistd.h>
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#include "inet_config.h"
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#define CRAMPED (_EM_WSIZE==2) /* 64K code and data is quite cramped. */
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#if CRAMPED
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#endif
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struct eth_conf eth_conf[IP_PORT_MAX];
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struct psip_conf psip_conf[IP_PORT_MAX];
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struct ip_conf ip_conf[IP_PORT_MAX];
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dev_t ip_dev;
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int eth_conf_nr;
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#if ENABLE_PSIP
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int psip_conf_nr;
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#endif
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int ip_conf_nr;
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static u8_t iftype[IP_PORT_MAX]; /* Interface in use as? */
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static int ifdefault= -1; /* Default network interface. */
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static void fatal(char *label)
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{
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printf("init: %s: Error %d\n", label, errno);
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exit(1);
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}
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static void check_rm(char *device)
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/* Check if a device is not among the living. */
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{
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if (unlink(device) < 0) {
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if (errno == ENOENT) return;
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fatal(device);
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}
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printf("rm %s\n", device);
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}
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static void check_mknod(char *device, mode_t mode, int minor)
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/* Check if a device exists with the proper device number. */
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{
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struct stat st;
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dev_t dev;
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dev= (ip_dev & 0xFF00) | minor;
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if (stat(device, &st) < 0) {
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if (errno != ENOENT) fatal(device);
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} else {
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if (S_ISCHR(st.st_mode) && st.st_rdev == dev) return;
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if (unlink(device) < 0) fatal(device);
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}
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if (mknod(device, S_IFCHR | mode, dev) < 0) fatal(device);
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printf("mknod %s c %d %d\n", device, (ip_dev >> 8), minor);
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}
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static void check_ln(char *old, char *new)
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/* Check if 'old' and 'new' are still properly linked. */
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{
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struct stat st_old, st_new;
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if (stat(old, &st_old) < 0) fatal(old);
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if (stat(new, &st_new) < 0) {
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if (errno != ENOENT) fatal(new);
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} else {
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if (st_new.st_dev == st_old.st_dev
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&& st_new.st_ino == st_old.st_ino) {
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return;
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}
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if (unlink(new) < 0) fatal(new);
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}
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if (link(old, new) < 0) fatal(new);
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printf("ln %s %s\n", old, new);
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}
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static void check_dev(int type, int ifno)
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/* Check if the device group with interface number 'ifno' exists and has the
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* proper device numbers. If 'type' is -1 then the device group must be
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* removed.
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*/
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{
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static struct devlist {
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char *defname;
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mode_t mode;
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u8_t minor_off;
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} devlist[] = {
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{ "/dev/eth", 0600, ETH_DEV_OFF },
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{ "/dev/psip", 0600, PSIP_DEV_OFF },
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{ "/dev/ip", 0600, IP_DEV_OFF },
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{ "/dev/tcp", 0666, TCP_DEV_OFF },
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{ "/dev/udp", 0666, UDP_DEV_OFF },
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};
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struct devlist *dvp;
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int i;
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char device[sizeof("/dev/psip99")];
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char *dp;
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for (i= 0; i < sizeof(devlist) / sizeof(devlist[0]); i++) {
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dvp= &devlist[i];
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strcpy(device, dvp->defname);
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dp= device + strlen(device);
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if (ifno >= 10) *dp++ = '0' + (ifno / 10);
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*dp++ = '0' + (ifno % 10);
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*dp = 0;
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if (type == 0
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|| (i == 0 && type != NETTYPE_ETH)
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|| (i == 1 && type != NETTYPE_PSIP)
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) {
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check_rm(device);
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if (ifno == ifdefault) check_rm(dvp->defname);
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} else {
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check_mknod(device, dvp->mode,
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if2minor(ifno, dvp->minor_off));
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if (ifno == ifdefault) check_ln(device, dvp->defname);
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}
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}
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}
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static int cfg_fd;
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static char word[16];
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static unsigned line;
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static void error(void)
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{
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printf("inet: error on line %u\n", line);
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exit(1);
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}
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static void token(int need)
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{
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/* Read a word from the configuration file. Return a null string on
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* EOF. Return a punctiation as a one character word. If 'need' is
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* true then an actual word is expected at this point, so err out if
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* not.
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*/
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unsigned char *wp;
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static unsigned char c= '\n';
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wp= (unsigned char *) word;
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*wp = 0;
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while (c <= ' ') {
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if (c == '\n') line++;
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if (read(cfg_fd, &c, 1) != 1) {
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if (need) error();
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return;
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}
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}
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do {
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if (wp < (unsigned char *) word + sizeof(word)-1) *wp++ = c;
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if (read(cfg_fd, &c, 1) != 1) c= ' ';
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if (word[0] == ';' || word[0] == '{' || word[0] == '}') {
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if (need) error();
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break;
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}
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} while (c > ' ' && c != ';' && c != '{' && c != '}');
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*wp = 0;
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}
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static unsigned number(char *str, unsigned max)
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{
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/* Interpret a string as an unsigned decimal number, no bigger than
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* 'max'. Return this number.
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*/
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char *s;
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unsigned n, d;
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s= str;
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n= 0;
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while ((d= (*s - '0')) < 10 && n <= max) {
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n= n * 10 + d;
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s++;
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}
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if (*s != 0 || n > max) {
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printf("inet: '%s' is not a number <= %u\n", str, max);
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error();
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}
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return n;
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}
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void read_conf(void)
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{
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int i, j, ifno, type, port;
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struct eth_conf *ecp;
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struct psip_conf *pcp;
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struct ip_conf *icp;
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struct stat st;
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/* Open the configuration file. */
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if ((cfg_fd= open(PATH_INET_CONF, O_RDONLY)) == -1)
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fatal(PATH_INET_CONF);
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ecp= eth_conf;
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pcp= psip_conf;
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icp= ip_conf;
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while (token(0), word[0] != 0) {
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if (strncmp(word, "eth", 3) == 0) {
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ecp->ec_ifno= ifno= number(word+3, IP_PORT_MAX-1);
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type= NETTYPE_ETH;
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port= eth_conf_nr;
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token(1);
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ecp->ec_task= alloc(strlen(word)+1);
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strcpy(ecp->ec_task, word);
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token(1);
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ecp->ec_port= number(word, IP_PORT_MAX-1);
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ecp++;
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eth_conf_nr++;
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#if ENABLE_PSIP
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} else
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if (strncmp(word, "psip", 4) == 0) {
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pcp->pc_ifno= ifno= number(word+4, IP_PORT_MAX-1);
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type= NETTYPE_PSIP;
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port= psip_conf_nr;
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pcp++;
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psip_conf_nr++;
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#endif
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} else {
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printf("inet: Unknown device '%s'\n", word);
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error();
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}
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iftype[ifno]= type;
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icp->ic_ifno= ifno;
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icp->ic_devtype= type;
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icp->ic_port= port;
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token(0);
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if (word[0] == '{') {
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token(0);
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if (strcmp(word, "default") == 0) {
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if (ifdefault != -1) {
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printf(
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"inet: ip%d and ip%d can't both be default\n",
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ifdefault, ifno);
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error();
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}
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ifdefault= ifno;
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token(0);
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}
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if (word[0] == ';') token(0);
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if (word[0] != '}') error();
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token(0);
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}
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if (word[0] != ';' && word[0] != 0) error();
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icp++;
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ip_conf_nr++;
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}
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if (ifdefault == -1) {
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printf("inet: No networks or no default network defined\n");
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exit(1);
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}
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/* Set umask 0 so we can creat mode 666 devices. */
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(void) umask(0);
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/* See what the device number of /dev/ip is. That's what we
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* used last time for the network devices, so we keep doing so.
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*/
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if (stat("/dev/ip", &st) < 0) fatal("/dev/ip");
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ip_dev= st.st_rdev;
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for (i= 0; i < IP_PORT_MAX; i++) {
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/* Create network devices. */
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check_dev(iftype[i], i);
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}
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}
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void *alloc(size_t size)
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{
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/* Allocate memory on the heap with sbrk(). */
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return sbrk((size + (sizeof(char *) - 1)) & ~(sizeof(char *) - 1));
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}
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/*
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* $PchId: inet_config.c,v 1.6 1998/10/23 20:15:27 philip Exp $
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*/
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