diff -up dhcp-4.3.3b1/client/clparse.c.cloexec dhcp-4.3.3b1/client/clparse.c --- dhcp-4.3.3b1/client/clparse.c.cloexec 2015-08-10 10:46:20.264755543 +0200 +++ dhcp-4.3.3b1/client/clparse.c 2015-08-10 10:46:20.274755510 +0200 @@ -247,7 +247,7 @@ int read_client_conf_file (const char *n int token; isc_result_t status; - if ((file = open (name, O_RDONLY)) < 0) + if ((file = open (name, O_RDONLY | O_CLOEXEC)) < 0) return uerr2isc (errno); cfile = NULL; @@ -323,7 +323,7 @@ void read_client_leases () /* Open the lease file. If we can't open it, just return - we can safely trust the server to remember our state. */ - if ((file = open (path_dhclient_db, O_RDONLY)) < 0) + if ((file = open (path_dhclient_db, O_RDONLY | O_CLOEXEC)) < 0) return; cfile = NULL; diff -up dhcp-4.3.3b1/client/dhclient.c.cloexec dhcp-4.3.3b1/client/dhclient.c --- dhcp-4.3.3b1/client/dhclient.c.cloexec 2015-08-10 10:46:20.260755556 +0200 +++ dhcp-4.3.3b1/client/dhclient.c 2015-08-10 10:46:20.275755506 +0200 @@ -153,11 +153,11 @@ main(int argc, char **argv) { /* Make sure that file descriptors 0 (stdin), 1, (stdout), and 2 (stderr) are open. To do this, we assume that when we open a file the lowest available file descriptor is used. */ - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 0) - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 1) - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 2) log_perror = 0; /* No sense logging to /dev/null. */ else if (fd != -1) @@ -519,7 +519,7 @@ main(int argc, char **argv) { long temp; int e; - if ((pidfd = fopen(path_dhclient_pid, "r")) != NULL) { + if ((pidfd = fopen(path_dhclient_pid, "re")) != NULL) { e = fscanf(pidfd, "%ld\n", &temp); oldpid = (pid_t)temp; @@ -574,7 +574,7 @@ main(int argc, char **argv) { strncpy(new_path_dhclient_pid, path_dhclient_pid, pfx); sprintf(new_path_dhclient_pid + pfx, "-%s.pid", ip->name); - if ((pidfd = fopen(new_path_dhclient_pid, "r")) != NULL) { + if ((pidfd = fopen(new_path_dhclient_pid, "re")) != NULL) { e = fscanf(pidfd, "%ld\n", &temp); oldpid = (pid_t)temp; @@ -599,7 +599,7 @@ main(int argc, char **argv) { int dhc_running = 0; char procfn[256] = ""; - if ((pidfp = fopen(path_dhclient_pid, "r")) != NULL) { + if ((pidfp = fopen(path_dhclient_pid, "re")) != NULL) { if ((fscanf(pidfp, "%ld", &temp)==1) && ((dhcpid=(pid_t)temp) > 0)) { snprintf(procfn,256,"/proc/%u",dhcpid); dhc_running = (access(procfn, F_OK) == 0); @@ -3120,7 +3120,7 @@ void rewrite_client_leases () if (leaseFile != NULL) fclose (leaseFile); - leaseFile = fopen (path_dhclient_db, "w"); + leaseFile = fopen (path_dhclient_db, "we"); if (leaseFile == NULL) { log_error ("can't create %s: %m", path_dhclient_db); return; @@ -3313,7 +3313,7 @@ write_duid(struct data_string *duid) return DHCP_R_INVALIDARG; if (leaseFile == NULL) { /* XXX? */ - leaseFile = fopen(path_dhclient_db, "w"); + leaseFile = fopen(path_dhclient_db, "we"); if (leaseFile == NULL) { log_error("can't create %s: %m", path_dhclient_db); return ISC_R_IOERROR; @@ -3493,7 +3493,7 @@ int write_client_lease (client, lease, r return 1; if (leaseFile == NULL) { /* XXX */ - leaseFile = fopen (path_dhclient_db, "w"); + leaseFile = fopen (path_dhclient_db, "we"); if (leaseFile == NULL) { log_error ("can't create %s: %m", path_dhclient_db); return 0; @@ -4011,9 +4011,9 @@ void go_daemon () (void) close(2); /* Reopen them on /dev/null. */ - (void) open("/dev/null", O_RDWR); - (void) open("/dev/null", O_RDWR); - (void) open("/dev/null", O_RDWR); + (void) open("/dev/null", O_RDWR | O_CLOEXEC); + (void) open("/dev/null", O_RDWR | O_CLOEXEC); + (void) open("/dev/null", O_RDWR | O_CLOEXEC); write_client_pid_file (); @@ -4030,14 +4030,14 @@ void write_client_pid_file () return; } - pfdesc = open (path_dhclient_pid, O_CREAT | O_TRUNC | O_WRONLY, 0644); + pfdesc = open (path_dhclient_pid, O_CREAT | O_TRUNC | O_WRONLY | O_CLOEXEC, 0644); if (pfdesc < 0) { log_error ("Can't create %s: %m", path_dhclient_pid); return; } - pf = fdopen (pfdesc, "w"); + pf = fdopen (pfdesc, "we"); if (!pf) { close(pfdesc); log_error ("Can't fdopen %s: %m", path_dhclient_pid); diff -up dhcp-4.3.3b1/common/bpf.c.cloexec dhcp-4.3.3b1/common/bpf.c --- dhcp-4.3.3b1/common/bpf.c.cloexec 2015-07-30 15:17:16.000000000 +0200 +++ dhcp-4.3.3b1/common/bpf.c 2015-08-10 10:46:20.275755506 +0200 @@ -95,7 +95,7 @@ int if_register_bpf (info) for (b = 0; 1; b++) { /* %Audit% 31 bytes max. %2004.06.17,Safe% */ sprintf(filename, BPF_FORMAT, b); - sock = open (filename, O_RDWR, 0); + sock = open (filename, O_RDWR | O_CLOEXEC, 0); if (sock < 0) { if (errno == EBUSY) { continue; diff -up dhcp-4.3.3b1/common/dlpi.c.cloexec dhcp-4.3.3b1/common/dlpi.c --- dhcp-4.3.3b1/common/dlpi.c.cloexec 2015-07-30 15:17:16.000000000 +0200 +++ dhcp-4.3.3b1/common/dlpi.c 2015-08-10 10:46:20.275755506 +0200 @@ -804,7 +804,7 @@ dlpiopen(const char *ifname) { } *dp = '\0'; - return open (devname, O_RDWR, 0); + return open (devname, O_RDWR | O_CLOEXEC, 0); } /* diff -up dhcp-4.3.3b1/common/nit.c.cloexec dhcp-4.3.3b1/common/nit.c --- dhcp-4.3.3b1/common/nit.c.cloexec 2015-07-30 15:17:16.000000000 +0200 +++ dhcp-4.3.3b1/common/nit.c 2015-08-10 10:46:20.275755506 +0200 @@ -75,7 +75,7 @@ int if_register_nit (info) struct strioctl sio; /* Open a NIT device */ - sock = open ("/dev/nit", O_RDWR); + sock = open ("/dev/nit", O_RDWR | O_CLOEXEC); if (sock < 0) log_fatal ("Can't open NIT device for %s: %m", info -> name); diff -up dhcp-4.3.3b1/common/resolv.c.cloexec dhcp-4.3.3b1/common/resolv.c --- dhcp-4.3.3b1/common/resolv.c.cloexec 2015-07-30 15:17:16.000000000 +0200 +++ dhcp-4.3.3b1/common/resolv.c 2015-08-10 10:46:20.276755503 +0200 @@ -44,7 +44,7 @@ void read_resolv_conf (parse_time) struct domain_search_list *dp, *dl, *nd; isc_result_t status; - if ((file = open (path_resolv_conf, O_RDONLY)) < 0) { + if ((file = open (path_resolv_conf, O_RDONLY | O_CLOEXEC)) < 0) { log_error ("Can't open %s: %m", path_resolv_conf); return; } diff -up dhcp-4.3.3b1/common/upf.c.cloexec dhcp-4.3.3b1/common/upf.c --- dhcp-4.3.3b1/common/upf.c.cloexec 2015-07-30 15:17:16.000000000 +0200 +++ dhcp-4.3.3b1/common/upf.c 2015-08-10 10:46:20.276755503 +0200 @@ -71,7 +71,7 @@ int if_register_upf (info) /* %Audit% Cannot exceed 36 bytes. %2004.06.17,Safe% */ sprintf(filename, "/dev/pf/pfilt%d", b); - sock = open (filename, O_RDWR, 0); + sock = open (filename, O_RDWR | O_CLOEXEC, 0); if (sock < 0) { if (errno == EBUSY) { continue; diff -up dhcp-4.3.3b1/omapip/trace.c.cloexec dhcp-4.3.3b1/omapip/trace.c --- dhcp-4.3.3b1/omapip/trace.c.cloexec 2015-07-30 15:17:16.000000000 +0200 +++ dhcp-4.3.3b1/omapip/trace.c 2015-08-10 10:46:20.276755503 +0200 @@ -138,10 +138,10 @@ isc_result_t trace_begin (const char *fi return DHCP_R_INVALIDARG; } - traceoutfile = open (filename, O_CREAT | O_WRONLY | O_EXCL, 0600); + traceoutfile = open (filename, O_CREAT | O_WRONLY | O_EXCL | O_CLOEXEC, 0600); if (traceoutfile < 0 && errno == EEXIST) { log_error ("WARNING: Overwriting trace file \"%s\"", filename); - traceoutfile = open (filename, O_WRONLY | O_EXCL | O_TRUNC, + traceoutfile = open (filename, O_WRONLY | O_EXCL | O_TRUNC | O_CLOEXEC, 0600); } @@ -429,7 +429,7 @@ void trace_file_replay (const char *file isc_result_t result; int len; - traceinfile = fopen (filename, "r"); + traceinfile = fopen (filename, "re"); if (!traceinfile) { log_error("Can't open tracefile %s: %m", filename); return; diff -up dhcp-4.3.3b1/relay/dhcrelay.c.cloexec dhcp-4.3.3b1/relay/dhcrelay.c --- dhcp-4.3.3b1/relay/dhcrelay.c.cloexec 2015-07-30 15:17:16.000000000 +0200 +++ dhcp-4.3.3b1/relay/dhcrelay.c 2015-08-10 10:46:20.276755503 +0200 @@ -187,11 +187,11 @@ main(int argc, char **argv) { /* Make sure that file descriptors 0(stdin), 1,(stdout), and 2(stderr) are open. To do this, we assume that when we open a file the lowest available file descriptor is used. */ - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 0) - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 1) - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 2) log_perror = 0; /* No sense logging to /dev/null. */ else if (fd != -1) @@ -558,13 +558,13 @@ main(int argc, char **argv) { if (no_pid_file == ISC_FALSE) { pfdesc = open(path_dhcrelay_pid, - O_CREAT | O_TRUNC | O_WRONLY, 0644); + O_CREAT | O_TRUNC | O_WRONLY | O_CLOEXEC, 0644); if (pfdesc < 0) { log_error("Can't create %s: %m", path_dhcrelay_pid); } else { - pf = fdopen(pfdesc, "w"); + pf = fdopen(pfdesc, "we"); if (!pf) log_error("Can't fdopen %s: %m", path_dhcrelay_pid); diff -up dhcp-4.3.3b1/server/confpars.c.cloexec dhcp-4.3.3b1/server/confpars.c --- dhcp-4.3.3b1/server/confpars.c.cloexec 2015-07-30 15:17:16.000000000 +0200 +++ dhcp-4.3.3b1/server/confpars.c 2015-08-10 10:46:20.277755500 +0200 @@ -111,7 +111,7 @@ isc_result_t read_conf_file (const char } #endif - if ((file = open (filename, O_RDONLY)) < 0) { + if ((file = open (filename, O_RDONLY | O_CLOEXEC)) < 0) { if (leasep) { log_error ("Can't open lease database %s: %m --", path_dhcpd_db); diff -up dhcp-4.3.3b1/server/db.c.cloexec dhcp-4.3.3b1/server/db.c --- dhcp-4.3.3b1/server/db.c.cloexec 2015-07-30 15:17:16.000000000 +0200 +++ dhcp-4.3.3b1/server/db.c 2015-08-10 10:47:32.644518358 +0200 @@ -1072,7 +1072,7 @@ void db_startup (testp) } #endif if (!testp) { - db_file = fopen (path_dhcpd_db, "a"); + db_file = fopen (path_dhcpd_db, "ae"); if (!db_file) log_fatal ("Can't open %s for append.", path_dhcpd_db); expire_all_pools (); @@ -1120,7 +1120,7 @@ int new_lease_file () path_dhcpd_db, (int)t) >= sizeof newfname) log_fatal("new_lease_file: lease file path too long"); - db_fd = open (newfname, O_WRONLY | O_TRUNC | O_CREAT, 0664); + db_fd = open (newfname, O_WRONLY | O_TRUNC | O_CREAT | O_CLOEXEC, 0664); if (db_fd < 0) { log_error ("Can't create new lease file: %m"); return 0; @@ -1141,7 +1141,7 @@ int new_lease_file () } #endif /* PARANOIA */ - if ((new_db_file = fdopen(db_fd, "w")) == NULL) { + if ((new_db_file = fdopen(db_fd, "we")) == NULL) { log_error("Can't fdopen new lease file: %m"); close(db_fd); goto fdfail; diff -up dhcp-4.3.3b1/server/dhcpd.c.cloexec dhcp-4.3.3b1/server/dhcpd.c --- dhcp-4.3.3b1/server/dhcpd.c.cloexec 2015-07-30 15:17:16.000000000 +0200 +++ dhcp-4.3.3b1/server/dhcpd.c 2015-08-10 10:46:20.278755497 +0200 @@ -194,11 +194,11 @@ main(int argc, char **argv) { /* Make sure that file descriptors 0 (stdin), 1, (stdout), and 2 (stderr) are open. To do this, we assume that when we open a file the lowest available file descriptor is used. */ - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 0) - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 1) - fd = open("/dev/null", O_RDWR); + fd = open("/dev/null", O_RDWR | O_CLOEXEC); if (fd == 2) log_perror = 0; /* No sense logging to /dev/null. */ else if (fd != -1) @@ -743,7 +743,7 @@ main(int argc, char **argv) { * appropriate. */ if (no_pid_file == ISC_FALSE) { - i = open(path_dhcpd_pid, O_WRONLY|O_CREAT|O_TRUNC, 0644); + i = open(path_dhcpd_pid, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0644); if (i >= 0) { sprintf(pbuf, "%d\n", (int) getpid()); IGNORE_RET(write(i, pbuf, strlen(pbuf))); @@ -787,9 +787,9 @@ main(int argc, char **argv) { (void) close(2); /* Reopen them on /dev/null. */ - (void) open("/dev/null", O_RDWR); - (void) open("/dev/null", O_RDWR); - (void) open("/dev/null", O_RDWR); + (void) open("/dev/null", O_RDWR | O_CLOEXEC); + (void) open("/dev/null", O_RDWR | O_CLOEXEC); + (void) open("/dev/null", O_RDWR | O_CLOEXEC); log_perror = 0; /* No sense logging to /dev/null. */ IGNORE_RET (chdir("/")); diff -up dhcp-4.3.3b1/server/ldap.c.cloexec dhcp-4.3.3b1/server/ldap.c --- dhcp-4.3.3b1/server/ldap.c.cloexec 2015-07-30 21:03:40.000000000 +0200 +++ dhcp-4.3.3b1/server/ldap.c 2015-08-10 10:46:20.279755493 +0200 @@ -1442,7 +1442,7 @@ ldap_start (void) if (ldap_debug_file != NULL && ldap_debug_fd == -1) { - if ((ldap_debug_fd = open (ldap_debug_file, O_CREAT | O_TRUNC | O_WRONLY, + if ((ldap_debug_fd = open (ldap_debug_file, O_CREAT | O_TRUNC | O_WRONLY | O_CLOEXEC, S_IRUSR | S_IWUSR)) < 0) log_error ("Error opening debug LDAP log file %s: %s", ldap_debug_file, strerror (errno));