*/
#ifndef lint
-static char rcsid[] = "$Id: sys-aix4.c,v 1.2 1995/04/24 05:33:43 paulus Exp $";
+static char rcsid[] = "$Id: sys-aix4.c,v 1.6 1995/05/01 00:26:11 paulus Exp $";
#endif
/*
*/
#include <stdio.h>
+/*
#include <stdlib.h>
+*/
#include <errno.h>
#include <syslog.h>
#include <termios.h>
int i;
for (i = 0; i <= 2; ++i)
- if (i != fd && i != s)
+ if (i != fd && i != sockfd)
close(i);
closed_stdio = 1;
}
restore_tty()
{
if (restore_term) {
+ if (!default_device) {
+ /*
+ * Turn off echoing, because otherwise we can get into
+ * a loop with the tty and the modem echoing to each other.
+ * We presume we are the sole user of this tty device, so
+ * when we close it, it will revert to its defaults anyway.
+ */
+ inittermios.c_lflag &= ~(ECHO | ECHONL);
+ }
if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
if (errno != ENXIO)
syslog(LOG_WARNING, "tcsetattr: %m");
return(found);
}
+/*
+ * Return user specified netmask, modified by any mask we might determine
+ * for address `addr' (in network byte order).
+ * Here we scan through the system's list of interfaces, looking for
+ * any non-point-to-point interfaces which might appear to be on the same
+ * network as `addr'. If we find any, we OR in their netmask to the
+ * user-specified netmask.
+ */
+#define MAX_IFS 32
+
+u_int32_t
+GetMask(addr)
+ u_int32_t addr;
+{
+ u_int32_t mask, nmask, ina;
+ struct ifreq *ifr, *ifend, ifreq;
+ struct ifconf ifc;
+ struct ifreq ifs[MAX_IFS];
+
+ addr = ntohl(addr);
+ if (IN_CLASSA(addr)) /* determine network mask for address class */
+ nmask = IN_CLASSA_NET;
+ else if (IN_CLASSB(addr))
+ nmask = IN_CLASSB_NET;
+ else
+ nmask = IN_CLASSC_NET;
+ /* class D nets are disallowed by bad_ip_adrs */
+ mask = netmask | htonl(nmask);
+
+ /*
+ * Scan through the system's network interfaces.
+ */
+ ifc.ifc_len = sizeof(ifs);
+ ifc.ifc_req = ifs;
+ if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
+ syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m");
+ return mask;
+ }
+ ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
+ for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
+ /*
+ * Check the interface's internet address.
+ */
+ if (ifr->ifr_addr.sa_family != AF_INET)
+ continue;
+ ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
+ if ((ntohl(ina) & nmask) != (addr & nmask))
+ continue;
+ /*
+ * Check that the interface is up, and not point-to-point or loopback.
+ */
+ strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
+ if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
+ continue;
+ if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
+ != IFF_UP)
+ continue;
+ /*
+ * Get its netmask and OR it into our mask.
+ */
+ if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
+ continue;
+ mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
+ }
+
+ return mask;
+}
+
#define WTMPFILE "/var/adm/wtmp"
int
/*
* Code for locking/unlocking the serial device.
- * This code is derived from chat.c.
*/
-#ifndef LOCK_DIR
-# ifdef HDB
-# define PIDSTRING
-# define LOCK_PREFIX "/usr/spool/locks/LCK.."
-# else /* HDB */
-# define LOCK_PREFIX "/usr/spool/uucp/LCK.."
-# endif /* HDB */
-#endif /* LOCK_DIR */
+static char *devlocked = (char *) 0;
-/*
- * lock - create a lock file for the named device.
- */
-int
-lock(dev)
- char *dev;
+int lock(char *device)
{
- char hdb_lock_buffer[12];
- int fd, pid, n;
- char *p;
-
- if ((p = strrchr(dev, '/')) != NULL)
- dev = p + 1;
- lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
- if (lock_file == NULL)
- novm("lock file name");
- strcat(strcpy(lock_file, LOCK_PREFIX), dev);
-
- while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
- if (errno == EEXIST
- && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
- /* Read the lock file to find out who has the device locked */
-#ifdef PIDSTRING
- n = read(fd, hdb_lock_buffer, 11);
- if (n > 0) {
- hdb_lock_buffer[n] = 0;
- pid = atoi(hdb_lock_buffer);
- }
-#else
- n = read(fd, &pid, sizeof(pid));
-#endif
- if (n <= 0) {
- syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
- close(fd);
- } else {
- if (kill(pid, 0) == -1 && errno == ESRCH) {
- /* pid no longer exists - remove the lock file */
- if (unlink(lock_file) == 0) {
- close(fd);
- syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
- dev, pid);
- continue;
- } else
- syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
- dev);
- } else
- syslog(LOG_NOTICE, "Device %s is locked by pid %d",
- dev, pid);
- }
- close(fd);
- } else
- syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
- free(lock_file);
- lock_file = NULL;
- return -1;
- }
+ char *devname;
+ int rc;
-#ifdef PIDSTRING
- sprintf(hdb_lock_buffer, "%10d\n", getpid());
- write(fd, hdb_lock_buffer, 11);
-#else
- pid = getpid();
- write(fd, &pid, sizeof pid);
-#endif
+ if (devname = strrchr(device,'/'))
+ ++devname;
+ else
+ devname = device;
- close(fd);
- return 0;
+ if ((rc = ttylock(devname)) == 0) {
+ devlocked = (char *) malloc(strlen(devname) + 1);
+ sprintf(devlocked,"%s",devname);
+ } else
+ devlocked = (char *) 0;
+
+ return(rc);
}
-/*
- * Remove our lockfile
- */
-unlock()
+int unlock()
{
- if (lock_file) {
- unlink(lock_file);
- free(lock_file);
- lock_file = NULL;
+ int rc = 0;
+
+ if (devlocked) {
+ rc = ttyunlock(devlocked);
+ free(devlocked);
+ devlocked = (char *) 0;
}
+ return(rc);
}
+
projects / ppp.git / blobdiff