mirror of https://github.com/omar-polo/gmid.git
129 lines
3.1 KiB
C
129 lines
3.1 KiB
C
/*
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* Copyright (c) 2021, 2023 Omar Polo <op@omarpolo.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "gmid.h"
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <errno.h>
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#include <event.h>
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#include <imsg.h>
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#include <netdb.h>
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#include <poll.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#include <syslog.h>
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#include <time.h>
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#include "log.h"
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#include "proc.h"
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#ifndef nitems
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#define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
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#endif
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static int logfd = -1;
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static int log_to_syslog = 1;
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static int facility = LOG_DAEMON;
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static void logger_init(struct privsep *, struct privsep_proc *, void *);
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static void logger_shutdown(void);
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static int logger_dispatch_parent(int, struct privsep_proc *, struct imsg *);
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static int logger_dispatch_server(int, struct privsep_proc *, struct imsg *);
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static struct privsep_proc procs[] = {
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{ "parent", PROC_PARENT, logger_dispatch_parent },
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{ "server", PROC_SERVER, logger_dispatch_server },
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};
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void
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logger(struct privsep *ps, struct privsep_proc *p)
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{
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proc_run(ps, p, procs, nitems(procs), logger_init, NULL);
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}
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static void
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logger_init(struct privsep *ps, struct privsep_proc *p, void *arg)
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{
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p->p_shutdown = logger_shutdown;
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openlog(getprogname(), LOG_NDELAY, LOG_DAEMON);
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tzset();
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sandbox_logger_process();
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}
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static void
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logger_shutdown(void)
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{
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closelog();
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if (logfd != -1)
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close(logfd);
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}
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static int
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logger_dispatch_parent(int fd, struct privsep_proc *p, struct imsg *imsg)
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{
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switch (imsg_get_type(imsg)) {
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case IMSG_LOG_FACILITY:
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if (imsg_get_data(imsg, &facility, sizeof(facility)) == -1)
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fatal("corrupted IMSG_LOG_SYSLOG");
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break;
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case IMSG_LOG_SYSLOG:
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if (imsg_get_data(imsg, &log_to_syslog,
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sizeof(log_to_syslog)) == -1)
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fatal("corrupted IMSG_LOG_SYSLOG");
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break;
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case IMSG_LOG_ACCESS:
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if (logfd != -1)
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close(logfd);
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logfd = imsg_get_fd(imsg);
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break;
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default:
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return -1;
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}
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return 0;
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}
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static int
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logger_dispatch_server(int fd, struct privsep_proc *p, struct imsg *imsg)
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{
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char *msg;
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size_t datalen = 0;
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struct ibuf ibuf;
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switch (imsg_get_type(imsg)) {
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case IMSG_LOG_REQUEST:
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if (imsg_get_ibuf(imsg, &ibuf) == -1 ||
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(datalen = ibuf_size(&ibuf)) == 0)
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fatal("got invalid IMSG_LOG_REQUEST");
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msg = ibuf_data(&ibuf);
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msg[datalen - 1] = '\0';
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if (logfd != -1)
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dprintf(logfd, "%s\n", msg);
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if (log_to_syslog)
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syslog(facility | LOG_NOTICE, "%s", msg);
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break;
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default:
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return -1;
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}
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return 0;
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}
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