diff options
Diffstat (limited to 'contrib/bind9/bin/named/unix/os.c')
| -rw-r--r-- | contrib/bind9/bin/named/unix/os.c | 850 |
1 files changed, 850 insertions, 0 deletions
diff --git a/contrib/bind9/bin/named/unix/os.c b/contrib/bind9/bin/named/unix/os.c new file mode 100644 index 0000000..5e6b98f --- /dev/null +++ b/contrib/bind9/bin/named/unix/os.c @@ -0,0 +1,850 @@ +/* + * Copyright (C) 2004-2009 Internet Systems Consortium, Inc. ("ISC") + * Copyright (C) 1999-2002 Internet Software Consortium. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH + * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, + * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM + * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE + * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +/* $Id: os.c,v 1.89.12.5 2009/03/02 03:03:54 marka Exp $ */ + +/*! \file */ + +#include <config.h> +#include <stdarg.h> + +#include <sys/types.h> /* dev_t FreeBSD 2.1 */ +#include <sys/stat.h> + +#include <ctype.h> +#include <errno.h> +#include <fcntl.h> +#include <grp.h> /* Required for initgroups() on IRIX. */ +#include <pwd.h> +#include <stdio.h> +#include <stdlib.h> +#include <signal.h> +#include <syslog.h> +#ifdef HAVE_TZSET +#include <time.h> +#endif +#include <unistd.h> + +#include <isc/buffer.h> +#include <isc/file.h> +#include <isc/print.h> +#include <isc/resource.h> +#include <isc/result.h> +#include <isc/strerror.h> +#include <isc/string.h> + +#include <named/main.h> +#include <named/os.h> +#ifdef HAVE_LIBSCF +#include <named/ns_smf_globals.h> +#endif + +static char *pidfile = NULL; +static int devnullfd = -1; + +#ifndef ISC_FACILITY +#define ISC_FACILITY LOG_DAEMON +#endif + +/* + * If there's no <linux/capability.h>, we don't care about <sys/prctl.h> + */ +#ifndef HAVE_LINUX_CAPABILITY_H +#undef HAVE_SYS_PRCTL_H +#endif + +/* + * Linux defines: + * (T) HAVE_LINUXTHREADS + * (C) HAVE_SYS_CAPABILITY_H (or HAVE_LINUX_CAPABILITY_H) + * (P) HAVE_SYS_PRCTL_H + * The possible cases are: + * none: setuid() normally + * T: no setuid() + * C: setuid() normally, drop caps (keep CAP_SETUID) + * T+C: no setuid(), drop caps (don't keep CAP_SETUID) + * T+C+P: setuid() early, drop caps (keep CAP_SETUID) + * C+P: setuid() normally, drop caps (keep CAP_SETUID) + * P: not possible + * T+P: not possible + * + * if (C) + * caps = BIND_SERVICE + CHROOT + SETGID + * if ((T && C && P) || !T) + * caps += SETUID + * endif + * capset(caps) + * endif + * if (T && C && P && -u) + * setuid() + * else if (T && -u) + * fail + * --> start threads + * if (!T && -u) + * setuid() + * if (C && (P || !-u)) + * caps = BIND_SERVICE + * capset(caps) + * endif + * + * It will be nice when Linux threads work properly with setuid(). + */ + +#ifdef HAVE_LINUXTHREADS +static pid_t mainpid = 0; +#endif + +static struct passwd *runas_pw = NULL; +static isc_boolean_t done_setuid = ISC_FALSE; +static int dfd[2] = { -1, -1 }; + +#ifdef HAVE_LINUX_CAPABILITY_H + +static isc_boolean_t non_root = ISC_FALSE; +static isc_boolean_t non_root_caps = ISC_FALSE; + +#ifdef HAVE_SYS_CAPABILITY_H +#include <sys/capability.h> +#else +/*% + * We define _LINUX_FS_H to prevent it from being included. We don't need + * anything from it, and the files it includes cause warnings with 2.2 + * kernels, and compilation failures (due to conflicts between <linux/string.h> + * and <string.h>) on 2.3 kernels. + */ +#define _LINUX_FS_H +#include <linux/capability.h> +#include <syscall.h> +#ifndef SYS_capset +#ifndef __NR_capset +#include <asm/unistd.h> /* Slackware 4.0 needs this. */ +#endif /* __NR_capset */ +#define SYS_capset __NR_capset +#endif /* SYS_capset */ +#endif /* HAVE_SYS_CAPABILITY_H */ + +#ifdef HAVE_SYS_PRCTL_H +#include <sys/prctl.h> /* Required for prctl(). */ + +/* + * If the value of PR_SET_KEEPCAPS is not in <sys/prctl.h>, define it + * here. This allows setuid() to work on systems running a new enough + * kernel but with /usr/include/linux pointing to "standard" kernel + * headers. + */ +#ifndef PR_SET_KEEPCAPS +#define PR_SET_KEEPCAPS 8 +#endif + +#endif /* HAVE_SYS_PRCTL_H */ + +#ifdef HAVE_LIBCAP +#define SETCAPS_FUNC "cap_set_proc " +#else +typedef unsigned int cap_t; +#define SETCAPS_FUNC "syscall(capset) " +#endif /* HAVE_LIBCAP */ + +static void +linux_setcaps(cap_t caps) { +#ifndef HAVE_LIBCAP + struct __user_cap_header_struct caphead; + struct __user_cap_data_struct cap; +#endif + char strbuf[ISC_STRERRORSIZE]; + + if ((getuid() != 0 && !non_root_caps) || non_root) + return; +#ifndef HAVE_LIBCAP + memset(&caphead, 0, sizeof(caphead)); + caphead.version = _LINUX_CAPABILITY_VERSION; + caphead.pid = 0; + memset(&cap, 0, sizeof(cap)); + cap.effective = caps; + cap.permitted = caps; + cap.inheritable = 0; +#endif +#ifdef HAVE_LIBCAP + if (cap_set_proc(caps) < 0) { +#else + if (syscall(SYS_capset, &caphead, &cap) < 0) { +#endif + isc__strerror(errno, strbuf, sizeof(strbuf)); + ns_main_earlyfatal(SETCAPS_FUNC "failed: %s:" + " please ensure that the capset kernel" + " module is loaded. see insmod(8)", + strbuf); + } +} + +#ifdef HAVE_LIBCAP +#define SET_CAP(flag) \ + do { \ + capval = (flag); \ + cap_flag_value_t curval; \ + err = cap_get_flag(curcaps, capval, CAP_PERMITTED, &curval); \ + if (err != -1 && curval) { \ + err = cap_set_flag(caps, CAP_EFFECTIVE, 1, &capval, CAP_SET); \ + if (err == -1) { \ + isc__strerror(errno, strbuf, sizeof(strbuf)); \ + ns_main_earlyfatal("cap_set_proc failed: %s", strbuf); \ + } \ + \ + err = cap_set_flag(caps, CAP_PERMITTED, 1, &capval, CAP_SET); \ + if (err == -1) { \ + isc__strerror(errno, strbuf, sizeof(strbuf)); \ + ns_main_earlyfatal("cap_set_proc failed: %s", strbuf); \ + } \ + } \ + } while (0) +#define INIT_CAP \ + do { \ + caps = cap_init(); \ + if (caps == NULL) { \ + isc__strerror(errno, strbuf, sizeof(strbuf)); \ + ns_main_earlyfatal("cap_init failed: %s", strbuf); \ + } \ + curcaps = cap_get_proc(); \ + if (curcaps == NULL) { \ + isc__strerror(errno, strbuf, sizeof(strbuf)); \ + ns_main_earlyfatal("cap_get_proc failed: %s", strbuf); \ + } \ + } while (0) +#define FREE_CAP \ + { \ + cap_free(caps); \ + cap_free(curcaps); \ + } while (0) +#else +#define SET_CAP(flag) do { caps |= (1 << (flag)); } while (0) +#define INIT_CAP do { caps = 0; } while (0) +#endif /* HAVE_LIBCAP */ + +static void +linux_initialprivs(void) { + cap_t caps; +#ifdef HAVE_LIBCAP + cap_t curcaps; + cap_value_t capval; + char strbuf[ISC_STRERRORSIZE]; + int err; +#endif + + /*% + * We don't need most privileges, so we drop them right away. + * Later on linux_minprivs() will be called, which will drop our + * capabilities to the minimum needed to run the server. + */ + INIT_CAP; + + /* + * We need to be able to bind() to privileged ports, notably port 53! + */ + SET_CAP(CAP_NET_BIND_SERVICE); + + /* + * We need chroot() initially too. + */ + SET_CAP(CAP_SYS_CHROOT); + +#if defined(HAVE_SYS_PRCTL_H) || !defined(HAVE_LINUXTHREADS) + /* + * We can setuid() only if either the kernel supports keeping + * capabilities after setuid() (which we don't know until we've + * tried) or we're not using threads. If either of these is + * true, we want the setuid capability. + */ + SET_CAP(CAP_SETUID); +#endif + + /* + * Since we call initgroups, we need this. + */ + SET_CAP(CAP_SETGID); + + /* + * Without this, we run into problems reading a configuration file + * owned by a non-root user and non-world-readable on startup. + */ + SET_CAP(CAP_DAC_READ_SEARCH); + + /* + * XXX We might want to add CAP_SYS_RESOURCE, though it's not + * clear it would work right given the way linuxthreads work. + * XXXDCL But since we need to be able to set the maximum number + * of files, the stack size, data size, and core dump size to + * support named.conf options, this is now being added to test. + */ + SET_CAP(CAP_SYS_RESOURCE); + + linux_setcaps(caps); + +#ifdef HAVE_LIBCAP + FREE_CAP; +#endif +} + +static void +linux_minprivs(void) { + cap_t caps; +#ifdef HAVE_LIBCAP + cap_t curcaps; + cap_value_t capval; + char strbuf[ISC_STRERRORSIZE]; + int err; +#endif + + INIT_CAP; + /*% + * Drop all privileges except the ability to bind() to privileged + * ports. + * + * It's important that we drop CAP_SYS_CHROOT. If we didn't, it + * chroot() could be used to escape from the chrooted area. + */ + + SET_CAP(CAP_NET_BIND_SERVICE); + + /* + * XXX We might want to add CAP_SYS_RESOURCE, though it's not + * clear it would work right given the way linuxthreads work. + * XXXDCL But since we need to be able to set the maximum number + * of files, the stack size, data size, and core dump size to + * support named.conf options, this is now being added to test. + */ + SET_CAP(CAP_SYS_RESOURCE); + + linux_setcaps(caps); + +#ifdef HAVE_LIBCAP + FREE_CAP; +#endif +} + +#ifdef HAVE_SYS_PRCTL_H +static void +linux_keepcaps(void) { + char strbuf[ISC_STRERRORSIZE]; + /*% + * Ask the kernel to allow us to keep our capabilities after we + * setuid(). + */ + + if (prctl(PR_SET_KEEPCAPS, 1, 0, 0, 0) < 0) { + if (errno != EINVAL) { + isc__strerror(errno, strbuf, sizeof(strbuf)); + ns_main_earlyfatal("prctl() failed: %s", strbuf); + } + } else { + non_root_caps = ISC_TRUE; + if (getuid() != 0) + non_root = ISC_TRUE; + } +} +#endif + +#endif /* HAVE_LINUX_CAPABILITY_H */ + + +static void +setup_syslog(const char *progname) { + int options; + + options = LOG_PID; +#ifdef LOG_NDELAY + options |= LOG_NDELAY; +#endif + openlog(isc_file_basename(progname), options, ISC_FACILITY); +} + +void +ns_os_init(const char *progname) { + setup_syslog(progname); +#ifdef HAVE_LINUX_CAPABILITY_H + linux_initialprivs(); +#endif +#ifdef HAVE_LINUXTHREADS + mainpid = getpid(); +#endif +#ifdef SIGXFSZ + signal(SIGXFSZ, SIG_IGN); +#endif +} + +void +ns_os_daemonize(void) { + pid_t pid; + char strbuf[ISC_STRERRORSIZE]; + + if (pipe(dfd) == -1) { + isc__strerror(errno, strbuf, sizeof(strbuf)); + ns_main_earlyfatal("pipe(): %s", strbuf); + } + + pid = fork(); + if (pid == -1) { + isc__strerror(errno, strbuf, sizeof(strbuf)); + ns_main_earlyfatal("fork(): %s", strbuf); + } + if (pid != 0) { + int n; + /* + * Wait for the child to finish loading for the first time. + * This would be so much simpler if fork() worked once we + * were multi-threaded. + */ + (void)close(dfd[1]); + do { + char buf; + n = read(dfd[0], &buf, 1); + if (n == 1) + _exit(0); + } while (n == -1 && errno == EINTR); + _exit(1); + } + (void)close(dfd[0]); + + /* + * We're the child. + */ + +#ifdef HAVE_LINUXTHREADS + mainpid = getpid(); +#endif + + if (setsid() == -1) { + isc__strerror(errno, strbuf, sizeof(strbuf)); + ns_main_earlyfatal("setsid(): %s", strbuf); + } + + /* + * Try to set stdin, stdout, and stderr to /dev/null, but press + * on even if it fails. + * + * XXXMLG The close() calls here are unneeded on all but NetBSD, but + * are harmless to include everywhere. dup2() is supposed to close + * the FD if it is in use, but unproven-pthreads-0.16 is broken + * and will end up closing the wrong FD. This will be fixed eventually, + * and these calls will be removed. + */ + if (devnullfd != -1) { + if (devnullfd != STDIN_FILENO) { + (void)close(STDIN_FILENO); + (void)dup2(devnullfd, STDIN_FILENO); + } + if (devnullfd != STDOUT_FILENO) { + (void)close(STDOUT_FILENO); + (void)dup2(devnullfd, STDOUT_FILENO); + } + if (devnullfd != STDERR_FILENO) { + (void)close(STDERR_FILENO); + (void)dup2(devnullfd, STDERR_FILENO); + } + } +} + +void +ns_os_started(void) { + char buf = 0; + + /* + * Signal to the parent that we started successfully. + */ + if (dfd[0] != -1 && dfd[1] != -1) { + if (write(dfd[1], &buf, 1) != 1) + ns_main_earlyfatal("unable to signal parent that we " + "otherwise started successfully."); + close(dfd[1]); + dfd[0] = dfd[1] = -1; + } +} + +void +ns_os_opendevnull(void) { + devnullfd = open("/dev/null", O_RDWR, 0); +} + +void +ns_os_closedevnull(void) { + if (devnullfd != STDIN_FILENO && + devnullfd != STDOUT_FILENO && + devnullfd != STDERR_FILENO) { + close(devnullfd); + devnullfd = -1; + } +} + +static isc_boolean_t +all_digits(const char *s) { + if (*s == '\0') + return (ISC_FALSE); + while (*s != '\0') { + if (!isdigit((*s)&0xff)) + return (ISC_FALSE); + s++; + } + return (ISC_TRUE); +} + +void +ns_os_chroot(const char *root) { + char strbuf[ISC_STRERRORSIZE]; +#ifdef HAVE_LIBSCF + ns_smf_chroot = 0; +#endif + if (root != NULL) { +#ifdef HAVE_CHROOT + if (chroot(root) < 0) { + isc__strerror(errno, strbuf, sizeof(strbuf)); + ns_main_earlyfatal("chroot(): %s", strbuf); + } +#else + ns_main_earlyfatal("chroot(): disabled"); +#endif + if (chdir("/") < 0) { + isc__strerror(errno, strbuf, sizeof(strbuf)); + ns_main_earlyfatal("chdir(/): %s", strbuf); + } +#ifdef HAVE_LIBSCF + /* Set ns_smf_chroot flag on successful chroot. */ + ns_smf_chroot = 1; +#endif + } +} + +void +ns_os_inituserinfo(const char *username) { + char strbuf[ISC_STRERRORSIZE]; + if (username == NULL) + return; + + if (all_digits(username)) + runas_pw = getpwuid((uid_t)atoi(username)); + else + runas_pw = getpwnam(username); + endpwent(); + + if (runas_pw == NULL) + ns_main_earlyfatal("user '%s' unknown", username); + + if (getuid() == 0) { + if (initgroups(runas_pw->pw_name, runas_pw->pw_gid) < 0) { + isc__strerror(errno, strbuf, sizeof(strbuf)); + ns_main_earlyfatal("initgroups(): %s", strbuf); + } + } + +} + +void +ns_os_changeuser(void) { + char strbuf[ISC_STRERRORSIZE]; + if (runas_pw == NULL || done_setuid) + return; + + done_setuid = ISC_TRUE; + +#ifdef HAVE_LINUXTHREADS +#ifdef HAVE_LINUX_CAPABILITY_H + if (!non_root_caps) + ns_main_earlyfatal("-u with Linux threads not supported: " + "requires kernel support for " + "prctl(PR_SET_KEEPCAPS)"); +#else + ns_main_earlyfatal("-u with Linux threads not supported: " + "no capabilities support or capabilities " + "disabled at build time"); +#endif +#endif + + if (setgid(runas_pw->pw_gid) < 0) { + isc__strerror(errno, strbuf, sizeof(strbuf)); + ns_main_earlyfatal("setgid(): %s", strbuf); + } + + if (setuid(runas_pw->pw_uid) < 0) { + isc__strerror(errno, strbuf, sizeof(strbuf)); + ns_main_earlyfatal("setuid(): %s", strbuf); + } + +#if defined(HAVE_SYS_PRCTL_H) && defined(PR_SET_DUMPABLE) + /* + * Restore the ability of named to drop core after the setuid() + * call has disabled it. + */ + if (prctl(PR_SET_DUMPABLE,1,0,0,0) < 0) { + isc__strerror(errno, strbuf, sizeof(strbuf)); + ns_main_earlywarning("prctl(PR_SET_DUMPABLE) failed: %s", + strbuf); + } +#endif +#if defined(HAVE_LINUX_CAPABILITY_H) && !defined(HAVE_LINUXTHREADS) + linux_minprivs(); +#endif +} + +void +ns_os_adjustnofile() { +#ifdef HAVE_LINUXTHREADS + isc_result_t result; + isc_resourcevalue_t newvalue; + + /* + * Linux: max number of open files specified by one thread doesn't seem + * to apply to other threads on Linux. + */ + newvalue = ISC_RESOURCE_UNLIMITED; + + result = isc_resource_setlimit(isc_resource_openfiles, newvalue); + if (result != ISC_R_SUCCESS) + ns_main_earlywarning("couldn't adjust limit on open files"); +#endif +} + +void +ns_os_minprivs(void) { +#ifdef HAVE_SYS_PRCTL_H + linux_keepcaps(); +#endif + +#ifdef HAVE_LINUXTHREADS + ns_os_changeuser(); /* Call setuid() before threads are started */ +#endif + +#if defined(HAVE_LINUX_CAPABILITY_H) && defined(HAVE_LINUXTHREADS) + linux_minprivs(); +#endif +} + +static int +safe_open(const char *filename, isc_boolean_t append) { + int fd; + struct stat sb; + + if (stat(filename, &sb) == -1) { + if (errno != ENOENT) + return (-1); + } else if ((sb.st_mode & S_IFREG) == 0) { + errno = EOPNOTSUPP; + return (-1); + } + + if (append) + fd = open(filename, O_WRONLY|O_CREAT|O_APPEND, + S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH); + else { + if (unlink(filename) < 0 && errno != ENOENT) + return (-1); + fd = open(filename, O_WRONLY|O_CREAT|O_EXCL, + S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH); + } + return (fd); +} + +static void +cleanup_pidfile(void) { + int n; + if (pidfile != NULL) { + n = unlink(pidfile); + if (n == -1 && errno != ENOENT) + ns_main_earlywarning("unlink '%s': failed", pidfile); + free(pidfile); + } + pidfile = NULL; +} + +static int +mkdirpath(char *filename, void (*report)(const char *, ...)) { + char *slash = strrchr(filename, '/'); + char strbuf[ISC_STRERRORSIZE]; + unsigned int mode; + + if (slash != NULL && slash != filename) { + struct stat sb; + *slash = '\0'; + + if (stat(filename, &sb) == -1) { + if (errno != ENOENT) { + isc__strerror(errno, strbuf, sizeof(strbuf)); + (*report)("couldn't stat '%s': %s", filename, + strbuf); + goto error; + } + if (mkdirpath(filename, report) == -1) + goto error; + mode = S_IRUSR | S_IWUSR | S_IXUSR; /* u=rwx */ + mode |= S_IRGRP | S_IXGRP; /* g=rx */ + mode |= S_IROTH | S_IXOTH; /* o=rx */ + if (mkdir(filename, mode) == -1) { + isc__strerror(errno, strbuf, sizeof(strbuf)); + (*report)("couldn't mkdir '%s': %s", filename, + strbuf); + goto error; + } + } + *slash = '/'; + } + return (0); + + error: + *slash = '/'; + return (-1); +} + +void +ns_os_writepidfile(const char *filename, isc_boolean_t first_time) { + int fd; + FILE *lockfile; + size_t len; + pid_t pid; + char strbuf[ISC_STRERRORSIZE]; + void (*report)(const char *, ...); + + /* + * The caller must ensure any required synchronization. + */ + + report = first_time ? ns_main_earlyfatal : ns_main_earlywarning; + + cleanup_pidfile(); + + if (filename == NULL) + return; + + len = strlen(filename); + pidfile = malloc(len + 1); + if (pidfile == NULL) { + isc__strerror(errno, strbuf, sizeof(strbuf)); + (*report)("couldn't malloc '%s': %s", filename, strbuf); + return; + } + + /* This is safe. */ + strcpy(pidfile, filename); + + /* + * Make the containing directory if it doesn't exist. + */ + if (mkdirpath(pidfile, report) == -1) { + free(pidfile); + pidfile = NULL; + return; + } + + fd = safe_open(filename, ISC_FALSE); + if (fd < 0) { + isc__strerror(errno, strbuf, sizeof(strbuf)); + (*report)("couldn't open pid file '%s': %s", filename, strbuf); + free(pidfile); + pidfile = NULL; + return; + } + lockfile = fdopen(fd, "w"); + if (lockfile == NULL) { + isc__strerror(errno, strbuf, sizeof(strbuf)); + (*report)("could not fdopen() pid file '%s': %s", + filename, strbuf); + (void)close(fd); + cleanup_pidfile(); + return; + } +#ifdef HAVE_LINUXTHREADS + pid = mainpid; +#else + pid = getpid(); +#endif + if (fprintf(lockfile, "%ld\n", (long)pid) < 0) { + (*report)("fprintf() to pid file '%s' failed", filename); + (void)fclose(lockfile); + cleanup_pidfile(); + return; + } + if (fflush(lockfile) == EOF) { + (*report)("fflush() to pid file '%s' failed", filename); + (void)fclose(lockfile); + cleanup_pidfile(); + return; + } + (void)fclose(lockfile); +} + +void +ns_os_shutdown(void) { + closelog(); + cleanup_pidfile(); +} + +isc_result_t +ns_os_gethostname(char *buf, size_t len) { + int n; + + n = gethostname(buf, len); + return ((n == 0) ? ISC_R_SUCCESS : ISC_R_FAILURE); +} + +static char * +next_token(char **stringp, const char *delim) { + char *res; + + do { + res = strsep(stringp, delim); + if (res == NULL) + break; + } while (*res == '\0'); + return (res); +} + +void +ns_os_shutdownmsg(char *command, isc_buffer_t *text) { + char *input, *ptr; + unsigned int n; + pid_t pid; + + input = command; + + /* Skip the command name. */ + ptr = next_token(&input, " \t"); + if (ptr == NULL) + return; + + ptr = next_token(&input, " \t"); + if (ptr == NULL) + return; + + if (strcmp(ptr, "-p") != 0) + return; + +#ifdef HAVE_LINUXTHREADS + pid = mainpid; +#else + pid = getpid(); +#endif + + n = snprintf((char *)isc_buffer_used(text), + isc_buffer_availablelength(text), + "pid: %ld", (long)pid); + /* Only send a message if it is complete. */ + if (n < isc_buffer_availablelength(text)) + isc_buffer_add(text, n); +} + +void +ns_os_tzset(void) { +#ifdef HAVE_TZSET + tzset(); +#endif +} |
