diff options
Diffstat (limited to 'src/journal/journald-syslog.c')
| -rw-r--r-- | src/journal/journald-syslog.c | 454 |
1 files changed, 0 insertions, 454 deletions
diff --git a/src/journal/journald-syslog.c b/src/journal/journald-syslog.c deleted file mode 100644 index 0609b4b694..0000000000 --- a/src/journal/journald-syslog.c +++ /dev/null @@ -1,454 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2011 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <stddef.h> -#include <sys/epoll.h> -#include <unistd.h> - -#include "sd-messages.h" - -#include "alloc-util.h" -#include "fd-util.h" -#include "formats-util.h" -#include "io-util.h" -#include "journald-console.h" -#include "journald-kmsg.h" -#include "journald-server.h" -#include "journald-syslog.h" -#include "journald-wall.h" -#include "process-util.h" -#include "selinux-util.h" -#include "socket-util.h" -#include "stdio-util.h" -#include "string-util.h" -#include "syslog-util.h" - -/* Warn once every 30s if we missed syslog message */ -#define WARN_FORWARD_SYSLOG_MISSED_USEC (30 * USEC_PER_SEC) - -static void forward_syslog_iovec(Server *s, const struct iovec *iovec, unsigned n_iovec, const struct ucred *ucred, const struct timeval *tv) { - - static const union sockaddr_union sa = { - .un.sun_family = AF_UNIX, - .un.sun_path = "/run/systemd/journal/syslog", - }; - struct msghdr msghdr = { - .msg_iov = (struct iovec *) iovec, - .msg_iovlen = n_iovec, - .msg_name = (struct sockaddr*) &sa.sa, - .msg_namelen = SOCKADDR_UN_LEN(sa.un), - }; - struct cmsghdr *cmsg; - union { - struct cmsghdr cmsghdr; - uint8_t buf[CMSG_SPACE(sizeof(struct ucred))]; - } control; - - assert(s); - assert(iovec); - assert(n_iovec > 0); - - if (ucred) { - zero(control); - msghdr.msg_control = &control; - msghdr.msg_controllen = sizeof(control); - - cmsg = CMSG_FIRSTHDR(&msghdr); - cmsg->cmsg_level = SOL_SOCKET; - cmsg->cmsg_type = SCM_CREDENTIALS; - cmsg->cmsg_len = CMSG_LEN(sizeof(struct ucred)); - memcpy(CMSG_DATA(cmsg), ucred, sizeof(struct ucred)); - msghdr.msg_controllen = cmsg->cmsg_len; - } - - /* Forward the syslog message we received via /dev/log to - * /run/systemd/syslog. Unfortunately we currently can't set - * the SO_TIMESTAMP auxiliary data, and hence we don't. */ - - if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0) - return; - - /* The socket is full? I guess the syslog implementation is - * too slow, and we shouldn't wait for that... */ - if (errno == EAGAIN) { - s->n_forward_syslog_missed++; - return; - } - - if (ucred && (errno == ESRCH || errno == EPERM)) { - struct ucred u; - - /* Hmm, presumably the sender process vanished - * by now, or we don't have CAP_SYS_AMDIN, so - * let's fix it as good as we can, and retry */ - - u = *ucred; - u.pid = getpid(); - memcpy(CMSG_DATA(cmsg), &u, sizeof(struct ucred)); - - if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0) - return; - - if (errno == EAGAIN) { - s->n_forward_syslog_missed++; - return; - } - } - - if (errno != ENOENT) - log_debug_errno(errno, "Failed to forward syslog message: %m"); -} - -static void forward_syslog_raw(Server *s, int priority, const char *buffer, const struct ucred *ucred, const struct timeval *tv) { - struct iovec iovec; - - assert(s); - assert(buffer); - - if (LOG_PRI(priority) > s->max_level_syslog) - return; - - IOVEC_SET_STRING(iovec, buffer); - forward_syslog_iovec(s, &iovec, 1, ucred, tv); -} - -void server_forward_syslog(Server *s, int priority, const char *identifier, const char *message, const struct ucred *ucred, const struct timeval *tv) { - struct iovec iovec[5]; - char header_priority[DECIMAL_STR_MAX(priority) + 3], header_time[64], - header_pid[sizeof("[]: ")-1 + DECIMAL_STR_MAX(pid_t) + 1]; - int n = 0; - time_t t; - struct tm *tm; - char *ident_buf = NULL; - - assert(s); - assert(priority >= 0); - assert(priority <= 999); - assert(message); - - if (LOG_PRI(priority) > s->max_level_syslog) - return; - - /* First: priority field */ - xsprintf(header_priority, "<%i>", priority); - IOVEC_SET_STRING(iovec[n++], header_priority); - - /* Second: timestamp */ - t = tv ? tv->tv_sec : ((time_t) (now(CLOCK_REALTIME) / USEC_PER_SEC)); - tm = localtime(&t); - if (!tm) - return; - if (strftime(header_time, sizeof(header_time), "%h %e %T ", tm) <= 0) - return; - IOVEC_SET_STRING(iovec[n++], header_time); - - /* Third: identifier and PID */ - if (ucred) { - if (!identifier) { - get_process_comm(ucred->pid, &ident_buf); - identifier = ident_buf; - } - - xsprintf(header_pid, "["PID_FMT"]: ", ucred->pid); - - if (identifier) - IOVEC_SET_STRING(iovec[n++], identifier); - - IOVEC_SET_STRING(iovec[n++], header_pid); - } else if (identifier) { - IOVEC_SET_STRING(iovec[n++], identifier); - IOVEC_SET_STRING(iovec[n++], ": "); - } - - /* Fourth: message */ - IOVEC_SET_STRING(iovec[n++], message); - - forward_syslog_iovec(s, iovec, n, ucred, tv); - - free(ident_buf); -} - -int syslog_fixup_facility(int priority) { - - if ((priority & LOG_FACMASK) == 0) - return (priority & LOG_PRIMASK) | LOG_USER; - - return priority; -} - -size_t syslog_parse_identifier(const char **buf, char **identifier, char **pid) { - const char *p; - char *t; - size_t l, e; - - assert(buf); - assert(identifier); - assert(pid); - - p = *buf; - - p += strspn(p, WHITESPACE); - l = strcspn(p, WHITESPACE); - - if (l <= 0 || - p[l-1] != ':') - return 0; - - e = l; - l--; - - if (p[l-1] == ']') { - size_t k = l-1; - - for (;;) { - - if (p[k] == '[') { - t = strndup(p+k+1, l-k-2); - if (t) - *pid = t; - - l = k; - break; - } - - if (k == 0) - break; - - k--; - } - } - - t = strndup(p, l); - if (t) - *identifier = t; - - if (strchr(WHITESPACE, p[e])) - e++; - *buf = p + e; - return e; -} - -static void syslog_skip_date(char **buf) { - enum { - LETTER, - SPACE, - NUMBER, - SPACE_OR_NUMBER, - COLON - } sequence[] = { - LETTER, LETTER, LETTER, - SPACE, - SPACE_OR_NUMBER, NUMBER, - SPACE, - SPACE_OR_NUMBER, NUMBER, - COLON, - SPACE_OR_NUMBER, NUMBER, - COLON, - SPACE_OR_NUMBER, NUMBER, - SPACE - }; - - char *p; - unsigned i; - - assert(buf); - assert(*buf); - - p = *buf; - - for (i = 0; i < ELEMENTSOF(sequence); i++, p++) { - - if (!*p) - return; - - switch (sequence[i]) { - - case SPACE: - if (*p != ' ') - return; - break; - - case SPACE_OR_NUMBER: - if (*p == ' ') - break; - - /* fall through */ - - case NUMBER: - if (*p < '0' || *p > '9') - return; - - break; - - case LETTER: - if (!(*p >= 'A' && *p <= 'Z') && - !(*p >= 'a' && *p <= 'z')) - return; - - break; - - case COLON: - if (*p != ':') - return; - break; - - } - } - - *buf = p; -} - -void server_process_syslog_message( - Server *s, - const char *buf, - const struct ucred *ucred, - const struct timeval *tv, - const char *label, - size_t label_len) { - - char syslog_priority[sizeof("PRIORITY=") + DECIMAL_STR_MAX(int)], - syslog_facility[sizeof("SYSLOG_FACILITY=") + DECIMAL_STR_MAX(int)]; - const char *message = NULL, *syslog_identifier = NULL, *syslog_pid = NULL; - struct iovec iovec[N_IOVEC_META_FIELDS + 6]; - unsigned n = 0; - int priority = LOG_USER | LOG_INFO; - _cleanup_free_ char *identifier = NULL, *pid = NULL; - const char *orig; - - assert(s); - assert(buf); - - orig = buf; - syslog_parse_priority(&buf, &priority, true); - - if (s->forward_to_syslog) - forward_syslog_raw(s, priority, orig, ucred, tv); - - syslog_skip_date((char**) &buf); - syslog_parse_identifier(&buf, &identifier, &pid); - - if (s->forward_to_kmsg) - server_forward_kmsg(s, priority, identifier, buf, ucred); - - if (s->forward_to_console) - server_forward_console(s, priority, identifier, buf, ucred); - - if (s->forward_to_wall) - server_forward_wall(s, priority, identifier, buf, ucred); - - IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=syslog"); - - xsprintf(syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK); - IOVEC_SET_STRING(iovec[n++], syslog_priority); - - if (priority & LOG_FACMASK) { - xsprintf(syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)); - IOVEC_SET_STRING(iovec[n++], syslog_facility); - } - - if (identifier) { - syslog_identifier = strjoina("SYSLOG_IDENTIFIER=", identifier); - IOVEC_SET_STRING(iovec[n++], syslog_identifier); - } - - if (pid) { - syslog_pid = strjoina("SYSLOG_PID=", pid); - IOVEC_SET_STRING(iovec[n++], syslog_pid); - } - - message = strjoina("MESSAGE=", buf); - if (message) - IOVEC_SET_STRING(iovec[n++], message); - - server_dispatch_message(s, iovec, n, ELEMENTSOF(iovec), ucred, tv, label, label_len, NULL, priority, 0); -} - -int server_open_syslog_socket(Server *s) { - - static const union sockaddr_union sa = { - .un.sun_family = AF_UNIX, - .un.sun_path = "/run/systemd/journal/dev-log", - }; - static const int one = 1; - int r; - - assert(s); - - if (s->syslog_fd < 0) { - s->syslog_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); - if (s->syslog_fd < 0) - return log_error_errno(errno, "socket() failed: %m"); - - (void) unlink(sa.un.sun_path); - - r = bind(s->syslog_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)); - if (r < 0) - return log_error_errno(errno, "bind(%s) failed: %m", sa.un.sun_path); - - (void) chmod(sa.un.sun_path, 0666); - } else - fd_nonblock(s->syslog_fd, 1); - - r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)); - if (r < 0) - return log_error_errno(errno, "SO_PASSCRED failed: %m"); - -#ifdef HAVE_SELINUX - if (mac_selinux_have()) { - r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one)); - if (r < 0) - log_warning_errno(errno, "SO_PASSSEC failed: %m"); - } -#endif - - r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one)); - if (r < 0) - return log_error_errno(errno, "SO_TIMESTAMP failed: %m"); - - r = sd_event_add_io(s->event, &s->syslog_event_source, s->syslog_fd, EPOLLIN, server_process_datagram, s); - if (r < 0) - return log_error_errno(r, "Failed to add syslog server fd to event loop: %m"); - - r = sd_event_source_set_priority(s->syslog_event_source, SD_EVENT_PRIORITY_NORMAL+5); - if (r < 0) - return log_error_errno(r, "Failed to adjust syslog event source priority: %m"); - - return 0; -} - -void server_maybe_warn_forward_syslog_missed(Server *s) { - usec_t n; - - assert(s); - - if (s->n_forward_syslog_missed <= 0) - return; - - n = now(CLOCK_MONOTONIC); - if (s->last_warn_forward_syslog_missed + WARN_FORWARD_SYSLOG_MISSED_USEC > n) - return; - - server_driver_message(s, SD_MESSAGE_FORWARD_SYSLOG_MISSED, - LOG_MESSAGE("Forwarding to syslog missed %u messages.", - s->n_forward_syslog_missed), - NULL); - - s->n_forward_syslog_missed = 0; - s->last_warn_forward_syslog_missed = n; -} |