*/
#ifndef lint
-static char rcsid[] = "$Id: sys-str.c,v 1.14 1994/09/21 06:47:37 paulus Exp $";
+static char rcsid[] = "$Id: sys-str.c,v 1.23 1995/08/11 02:36:23 paulus Exp $";
#endif
/*
*/
#include <stdio.h>
+#include <stdlib.h>
#include <errno.h>
#include <syslog.h>
#include <termios.h>
#include <sys/stream.h>
#include <sys/stropts.h>
+#include <arpa/inet.h>
#include <net/if.h>
#include <net/ppp_defs.h>
#include <net/ppp_str.h>
#include <net/route.h>
#include <net/if_arp.h>
+#include <net/nit_if.h>
#include <netinet/in.h>
#include "pppd.h"
static int restore_term; /* 1 => we've munged the terminal */
static struct termios inittermios; /* Initial TTY termios */
+static struct winsize wsinfo; /* Initial window size info */
+
+int sockfd; /* socket for doing interface ioctls */
+static char *lock_file; /* lock file created for serial port */
/*
* sys_init - System-dependent initialization.
setlogmask(LOG_UPTO(LOG_INFO));
if (debug)
setlogmask(LOG_UPTO(LOG_DEBUG));
+
+ /* Get an internet socket for doing socket ioctl's on. */
+ if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+ syslog(LOG_ERR, "Couldn't create IP socket: %m");
+ die(1);
+ }
}
/*
int i;
for (i = 0; i <= 2; ++i)
- if (i != fd && i != s)
+ if (i != fd && i != sockfd)
close(i);
closed_stdio = 1;
}
syslog(LOG_WARNING, "All received characters had %s", s);
}
}
- }
- while (ioctl(fd, I_POP, 0) == 0) /* pop any we pushed */
- ;
- pushed_ppp = 0;
+ while (ioctl(fd, I_POP, 0) == 0) /* pop any we pushed */
+ ;
- for (; str_module_count > 0; str_module_count--) {
- if (ioctl(fd, I_PUSH, str_modules[str_module_count-1].modname)) {
- if (errno != ENXIO)
- syslog(LOG_WARNING, "str_restore: couldn't push module %s: %m",
- str_modules[str_module_count-1].modname);
- } else {
- MAINDEBUG((LOG_INFO, "str_restore: pushed module %s",
- str_modules[str_module_count-1].modname));
+ for (; str_module_count > 0; str_module_count--) {
+ if (ioctl(fd, I_PUSH, str_modules[str_module_count-1].modname)) {
+ if (errno != ENXIO)
+ syslog(LOG_WARNING, "Couldn't restore module %s: %m",
+ str_modules[str_module_count-1].modname);
+ } else {
+ MAINDEBUG((LOG_INFO, "str_restore: pushed module %s",
+ str_modules[str_module_count-1].modname));
+ }
}
+ pushed_ppp = 0;
}
}
die(1);
}
- if (!restore_term)
+ if (!restore_term) {
inittermios = tios;
+ ioctl(fd, TIOCGWINSZ, &wsinfo);
+ }
tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
if (crtscts > 0)
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");
+ ioctl(fd, TIOCSWINSZ, &wsinfo);
restore_term = 0;
}
}
i = 0;
len = getmsg(fd, &ctl, &str, &i);
if (len < 0) {
- if (errno == EAGAIN || errno == EWOULDBLOCK) {
+ if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) {
return -1;
}
syslog(LOG_ERR, "getmsg(fd) %m");
strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
ifr.ifr_mtu = mtu;
- if (ioctl(s, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
+ if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
quit();
}
if(ioctl(fd, SIOCSIFASYNCMAP, (caddr_t) &asyncmap) < 0) {
+ if (hungup && errno == ENXIO)
+ return;
syslog(LOG_ERR, "ioctl(SIOCSIFASYNCMAP): %m");
quit();
}
}
if (ioctl(fd, SIOCSIFRASYNCMAP, (caddr_t) &asyncmap) < 0) {
+ if (hungup && errno == ENXIO)
+ return;
syslog(LOG_ERR, "ioctl(SIOCSIFRASYNCMAP): %m");
}
int x;
x = (isopen? 1: 0) + (isup? 2: 0);
- if (ioctl(fd, SIOCSIFCOMP, (caddr_t) &x) < 0 && errno != ENOTTY)
+ if (ioctl(fd, SIOCSIFCOMP, (caddr_t) &x) < 0 && errno != ENOTTY) {
+ if (hungup && errno == ENXIO)
+ return;
syslog(LOG_ERR, "ioctl (SIOCSIFCOMP): %m");
+ }
}
/*
}
/*
- * sifup - Config the interface up.
+ * sifup - Config the interface up and enable IP packets to pass.
*/
int
sifup(u)
int u;
{
struct ifreq ifr;
+ struct npioctl npi;
strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
+ if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
return 0;
}
ifr.ifr_flags |= IFF_UP;
- if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
+ if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
return 0;
}
+ npi.protocol = PPP_IP;
+ npi.mode = NPMODE_PASS;
+ if (ioctl(fd, SIOCSETNPMODE, &npi) < 0) {
+ if (errno != ENOTTY) {
+ syslog(LOG_ERR, "ioctl(SIOCSETNPMODE): %m");
+ return 0;
+ }
+ }
return 1;
}
int u;
{
struct ifreq ifr;
+ int rv;
+ struct npioctl npi;
+
+ rv = 1;
+ npi.protocol = PPP_IP;
+ npi.mode = NPMODE_ERROR;
+ if (ioctl(fd, SIOCSETNPMODE, (caddr_t) &npi) < 0) {
+ if (errno != ENOTTY && errno != ENXIO) {
+ syslog(LOG_ERR, "ioctl(SIOCSETNPMODE): %m");
+ rv = 0;
+ }
+ }
+
strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
+ if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
- return 0;
- }
- ifr.ifr_flags &= ~IFF_UP;
- if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
- return 0;
+ rv = 0;
+ } else {
+ if ((ifr.ifr_flags & IFF_UP) != 0) {
+ ifr.ifr_flags &= ~IFF_UP;
+ if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "Couldn't mark interface down: %m");
+ rv = 0;
+ }
+ }
}
- return 1;
+ return rv;
}
/*
strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
- if (ioctl(s, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
+ if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFADDR): %m");
ret = 0;
}
((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h;
- if (ioctl(s, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
+ if (ioctl(sockfd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFDSTADDR): %m");
ret = 0;
}
if (m != 0) {
((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m;
syslog(LOG_INFO, "Setting interface mask to %s\n", ip_ntoa(m));
- if (ioctl(s, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
+ if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFNETMASK): %m");
ret = 0;
}
SET_SA_FAMILY(rt.rt_gateway, AF_INET);
((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = o;
rt.rt_flags = RTF_HOST;
- if (ioctl(s, SIOCDELRT, (caddr_t) &rt) < 0) {
+ if (ioctl(sockfd, SIOCDELRT, (caddr_t) &rt) < 0) {
syslog(LOG_ERR, "ioctl(SIOCDELRT): %m");
return 0;
}
SET_SA_FAMILY(rt.rt_gateway, AF_INET);
((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
rt.rt_flags = RTF_GATEWAY;
- if (ioctl(s, SIOCADDRT, &rt) < 0) {
+ if (ioctl(sockfd, SIOCADDRT, &rt) < 0) {
syslog(LOG_ERR, "default route ioctl(SIOCADDRT): %m");
return 0;
}
SET_SA_FAMILY(rt.rt_gateway, AF_INET);
((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
rt.rt_flags = RTF_GATEWAY;
- if (ioctl(s, SIOCDELRT, &rt) < 0) {
+ if (ioctl(sockfd, SIOCDELRT, &rt) < 0) {
syslog(LOG_ERR, "default route ioctl(SIOCDELRT): %m");
return 0;
}
SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
arpreq.arp_flags = ATF_PERM | ATF_PUBL;
- if (ioctl(s, SIOCSARP, (caddr_t)&arpreq) < 0) {
+ if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
return 0;
}
BZERO(&arpreq, sizeof(arpreq));
SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
- if (ioctl(s, SIOCDARP, (caddr_t)&arpreq) < 0) {
+ if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
syslog(LOG_ERR, "ioctl(SIOCDARP): %m");
return 0;
}
/*
* get_ether_addr - get the hardware address of an interface on the
- * the same subnet as ipaddr. Code borrowed from myetheraddr.c
- * in the cslip-2.6 distribution, which is subject to the following
- * copyright notice (which also applies to logwtmp below):
- *
- * Copyright (c) 1990, 1992 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that: (1) source code distributions
- * retain the above copyright notice and this paragraph in its entirety, (2)
- * distributions including binary code include the above copyright notice and
- * this paragraph in its entirety in the documentation or other materials
- * provided with the distribution, and (3) all advertising materials mentioning
- * features or use of this software display the following acknowledgement:
- * ``This product includes software developed by the University of California,
- * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
- * the University nor the names of its contributors may be used to endorse
- * or promote products derived from this software without specific prior
- * written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * the same subnet as ipaddr.
*/
-
-#include <fcntl.h>
-#include <nlist.h>
-#include <kvm.h>
-#include <arpa/inet.h>
-
-/* XXX SunOS 4.1 defines this and 3.5 doesn't... */
-#ifdef _nlist_h
-#define SUNOS4
-#endif
-
-#ifdef SUNOS4
-#include <netinet/in_var.h>
-#endif
-#include <netinet/if_ether.h>
-
-/* Cast a struct sockaddr to a structaddr_in */
-#define SATOSIN(sa) ((struct sockaddr_in *)(sa))
-
-/* Determine if "bits" is set in "flag" */
-#define ALLSET(flag, bits) (((flag) & (bits)) == (bits))
-
-static struct nlist nl[] = {
-#define N_IFNET 0
- { "_ifnet" },
- { 0 }
-};
-
-static void kread();
+#define MAX_IFS 32
int
get_ether_addr(ipaddr, hwaddr)
u_int32_t ipaddr;
struct sockaddr *hwaddr;
{
- register kvm_t *kd;
- register struct ifnet *ifp;
- register struct arpcom *ac;
- struct arpcom arpcom;
- struct in_addr *inp;
-#ifdef SUNOS4
- register struct ifaddr *ifa;
- register struct in_ifaddr *in;
- union {
- struct ifaddr ifa;
- struct in_ifaddr in;
- } ifaddr;
-#endif
- u_int32_t addr, mask;
-
- /* Open kernel memory for reading */
- kd = kvm_open(0, 0, 0, O_RDONLY, NULL);
- if (kd == 0) {
- syslog(LOG_ERR, "kvm_open: %m");
+ struct ifreq *ifr, *ifend;
+ u_int32_t ina, mask;
+ struct ifreq ifreq;
+ struct ifconf ifc;
+ struct ifreq ifs[MAX_IFS];
+ int nit_fd;
+
+ ifc.ifc_len = sizeof(ifs);
+ ifc.ifc_req = ifs;
+ if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
return 0;
}
- /* Fetch namelist */
- if (kvm_nlist(kd, nl) != 0) {
- syslog(LOG_ERR, "kvm_nlist failed");
- return 0;
+ /*
+ * Scan through looking for an interface with an Internet
+ * address on the same subnet as `ipaddr'.
+ */
+ ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
+ for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
+ ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
+ if (ifr->ifr_addr.sa_family == AF_INET) {
+
+ /*
+ * 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_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
+ != (IFF_UP|IFF_BROADCAST))
+ continue;
+
+ /*
+ * Get its netmask and check that it's on the right subnet.
+ */
+ if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
+ continue;
+ ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
+ mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
+ if ((ipaddr & mask) != (ina & mask))
+ continue;
+
+ break;
+ }
}
- ac = &arpcom;
- ifp = &arpcom.ac_if;
-#ifdef SUNOS4
- ifa = &ifaddr.ifa;
- in = &ifaddr.in;
-#endif
+ if (ifr >= ifend)
+ return 0;
+ syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
- if (kvm_read(kd, nl[N_IFNET].n_value, (char *)&addr, sizeof(addr))
- != sizeof(addr)) {
- syslog(LOG_ERR, "error reading ifnet addr");
+ /*
+ * Grab the physical address for this interface.
+ */
+ if ((nit_fd = open("/dev/nit", O_RDONLY)) < 0) {
+ syslog(LOG_ERR, "Couldn't open /dev/nit: %m");
return 0;
}
- for ( ; addr; addr = (u_int32_t)ifp->if_next) {
- if (kvm_read(kd, addr, (char *)ac, sizeof(*ac)) != sizeof(*ac)) {
- syslog(LOG_ERR, "error reading ifnet");
- return 0;
- }
-
- /* Only look at configured, broadcast interfaces */
- if (!ALLSET(ifp->if_flags, IFF_UP | IFF_BROADCAST))
- continue;
-#ifdef SUNOS4
- /* This probably can't happen... */
- if (ifp->if_addrlist == 0)
- continue;
-#endif
-
- /* Get interface ip address */
-#ifdef SUNOS4
- if (kvm_read(kd, (u_int32_t)ifp->if_addrlist, (char *)&ifaddr,
- sizeof(ifaddr)) != sizeof(ifaddr)) {
- syslog(LOG_ERR, "error reading ifaddr");
- return 0;
- }
- inp = &SATOSIN(&ifa->ifa_addr)->sin_addr;
-#else
- inp = &SATOSIN(&ifp->if_addr)->sin_addr;
-#endif
-
- /* Check if this interface on the right subnet */
-#ifdef SUNOS4
- mask = in->ia_subnetmask;
-#else
- mask = ifp->if_subnetmask;
-#endif
- if ((ipaddr & mask) != (inp->s_addr & mask))
- continue;
-
- /* Copy out the local ethernet address */
- hwaddr->sa_family = AF_UNSPEC;
- BCOPY((caddr_t) &arpcom.ac_enaddr, hwaddr->sa_data,
- sizeof(arpcom.ac_enaddr));
- return 1; /* success! */
+ strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
+ if (ioctl(nit_fd, NIOCBIND, &ifreq) < 0
+ || ioctl(nit_fd, SIOCGIFADDR, &ifreq) < 0) {
+ syslog(LOG_ERR, "Couldn't get hardware address for %s: %m",
+ ifreq.ifr_name);
+ close(nit_fd);
+ return 0;
}
- /* couldn't find one */
- return 0;
+ hwaddr->sa_family = AF_UNSPEC;
+ memcpy(hwaddr->sa_data, ifreq.ifr_addr.sa_data, 6);
+ close(nit_fd);
+ return 1;
}
#define WTMPFILE "/usr/adm/wtmp"
}
close(fd);
}
+
+/*
+ * 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;
+}
+
+/*
+ * Code for locking/unlocking the serial device.
+ * This code is derived from chat.c.
+ */
+
+#if !defined(HDB) && !defined(SUNOS3)
+#define HDB 1 /* ascii lock files are the default */
+#endif
+
+#ifndef LOCK_DIR
+# if HDB
+# define PIDSTRING
+# define LOCK_PREFIX "/usr/spool/locks/LCK.."
+# else /* HDB */
+# define LOCK_PREFIX "/usr/spool/uucp/LCK.."
+# endif /* HDB */
+#endif /* LOCK_DIR */
+
+/*
+ * lock - create a lock file for the named device.
+ */
+int
+lock(dev)
+ char *dev;
+{
+ 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;
+ }
+
+#ifdef PIDSTRING
+ sprintf(hdb_lock_buffer, "%10d\n", getpid());
+ write(fd, hdb_lock_buffer, 11);
+#else
+ pid = getpid();
+ write(fd, &pid, sizeof pid);
+#endif
+
+ close(fd);
+ return 0;
+}
+
+/*
+ * unlock - remove our lockfile
+ */
+void
+unlock()
+{
+ if (lock_file) {
+ unlink(lock_file);
+ free(lock_file);
+ lock_file = NULL;
+ }
+}
+
+/*
+ * SunOS doesn't have strtoul :-(
+ */
+unsigned long
+strtoul(str, ptr, base)
+ char *str, **ptr;
+ int base;
+{
+ return (unsigned long) strtol(str, ptr, base);
+}
projects / ppp.git / blobdiff