diff --git a/libc/Makefile b/libc/Makefile
index f3bf5348..3290cb22 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -387,6 +387,12 @@ stdlib/unsetenv.o \
sys/display/dispmsg_issue.o \
sys/ioctl/ioctl.o \
sys/kernelinfo/kernelinfo.o \
+syslog/closelog.o \
+syslog/connectlog.o \
+syslog/openlog.o \
+syslog/setlogmask.o \
+syslog/syslog.o \
+syslog/vsyslog.o \
sys/mman/mmap.o \
sys/mman/mprotect.o \
sys/mman/munmap.o \
diff --git a/libc/include/syslog.h b/libc/include/syslog.h
new file mode 100644
index 00000000..32865fc0
--- /dev/null
+++ b/libc/include/syslog.h
@@ -0,0 +1,107 @@
+/*******************************************************************************
+
+ Copyright(C) Jonas 'Sortie' Termansen 2014.
+
+ This file is part of the Sortix C Library.
+
+ The Sortix C Library 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 3 of the License, or (at your
+ option) any later version.
+
+ The Sortix C Library 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 the Sortix C Library. If not, see .
+
+ syslog.h
+ System error logging facility.
+
+*******************************************************************************/
+
+#ifndef INCLUDE_SYSLOG_H
+#define INCLUDE_SYSLOG_H
+
+#include
+
+#include
+
+__BEGIN_DECLS
+
+#define LOG_PRISHIFT 0
+#define LOG_PRIBITS 3
+#define LOG_FACSHIFT LOG_PRIBITS
+#define LOG_FACBITS (31 - LOG_PRIBITS)
+
+#define LOG_PRIMASK (((1 << LOG_PRIBITS) - 1) << LOG_PRISHIFT)
+#define LOG_FACMASK (((1 << LOG_FACBITS) - 1) << LOG_FACSHIFT)
+#define LOG_PRI(x) ((x) >> LOG_PRISHIFT & LOG_PRIMASK)
+#define LOG_FAC(x) ((x) >> LOG_FACSHIFT & LOG_FACMASK)
+
+#define LOG_MAKEPRI(fac, pri) ((fac) << LOG_FACSHIFT | (pri) << LOG_PRISHIFT)
+
+#define LOG_EMERG 0
+#define LOG_ALERT 1
+#define LOG_CRIT 2
+#define LOG_ERR 3
+#define LOG_WARNING 4
+#define LOG_NOTICE 5
+#define LOG_INFO 6
+#define LOG_DEBUG 7
+
+#define LOG_MASK(pri) (1 << ((pri) >> LOG_PRISHIFT))
+#define LOG_UPTO(pri) ((1 << (((pri) >> LOG_PRISHIFT) + 1)) - 1)
+
+#define LOG_KERN (0 << LOG_FACSHIFT)
+#define LOG_USER (1 << LOG_FACSHIFT)
+#define LOG_MAIL (2 << LOG_FACSHIFT)
+#define LOG_DAEMON (3 << LOG_FACSHIFT)
+#define LOG_AUTH (4 << LOG_FACSHIFT)
+#define LOG_SYSLOG (5 << LOG_FACSHIFT)
+#define LOG_LPR (6 << LOG_FACSHIFT)
+#define LOG_NEWS (7 << LOG_FACSHIFT)
+#define LOG_UUCP (8 << LOG_FACSHIFT)
+#define LOG_CRON (9 << LOG_FACSHIFT)
+#define LOG_AUTHPRIV (10 << LOG_FACSHIFT)
+#define LOG_FTP (11 << LOG_FACSHIFT)
+/* 12 through 15 are reserved */
+#define LOG_LOCAL0 (16 << LOG_FACSHIFT)
+#define LOG_LOCAL1 (17 << LOG_FACSHIFT)
+#define LOG_LOCAL2 (18 << LOG_FACSHIFT)
+#define LOG_LOCAL3 (19 << LOG_FACSHIFT)
+#define LOG_LOCAL4 (20 << LOG_FACSHIFT)
+#define LOG_LOCAL5 (21 << LOG_FACSHIFT)
+#define LOG_LOCAL6 (22 << LOG_FACSHIFT)
+#define LOG_LOCAL7 (23 << LOG_FACSHIFT)
+#define LOG_NFACILITIES 24
+
+#define LOG_CONS (1 << 0)
+#define LOG_NDELAY (1 << 1)
+#define LOG_NOWAIT (1 << 2)
+#define LOG_ODELAY (1 << 3)
+#define LOG_PERROR (1 << 4)
+#define LOG_PID (1 << 5)
+
+#if defined(__is_sortix_libc)
+extern char* __syslog_identity;
+extern int __syslog_facility;
+extern int __syslog_fd;
+extern int __syslog_mask;
+extern int __syslog_option;
+#endif
+
+void closelog(void);
+int connectlog(void);
+void openlog(const char*, int, int);
+int setlogmask(int);
+__attribute__ ((__format__ (__printf__, 2, 3)))
+void syslog(int, const char*, ...);
+__attribute__ ((__format__ (__printf__, 2, 0)))
+void vsyslog(int, const char*, va_list);
+
+__END_DECLS
+
+#endif
diff --git a/libc/syslog/closelog.cpp b/libc/syslog/closelog.cpp
new file mode 100644
index 00000000..b2ed2b85
--- /dev/null
+++ b/libc/syslog/closelog.cpp
@@ -0,0 +1,35 @@
+/*******************************************************************************
+
+ Copyright(C) Jonas 'Sortie' Termansen 2014.
+
+ This file is part of the Sortix C Library.
+
+ The Sortix C Library 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 3 of the License, or (at your
+ option) any later version.
+
+ The Sortix C Library 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 the Sortix C Library. If not, see .
+
+ syslog/closelog.cpp
+ Closes the connection to the system log.
+
+*******************************************************************************/
+
+#include
+#include
+
+extern "C" void closelog(void)
+{
+ if ( 0 <= __syslog_fd )
+ {
+ close(__syslog_fd);
+ __syslog_fd = -1;
+ }
+}
diff --git a/libc/syslog/connectlog.cpp b/libc/syslog/connectlog.cpp
new file mode 100644
index 00000000..19de04dd
--- /dev/null
+++ b/libc/syslog/connectlog.cpp
@@ -0,0 +1,31 @@
+/*******************************************************************************
+
+ Copyright(C) Jonas 'Sortie' Termansen 2014.
+
+ This file is part of the Sortix C Library.
+
+ The Sortix C Library 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 3 of the License, or (at your
+ option) any later version.
+
+ The Sortix C Library 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 the Sortix C Library. If not, see .
+
+ syslog/connectlog.cpp
+ Returns a file descriptor to the system log.
+
+*******************************************************************************/
+
+#include
+#include
+
+extern "C" int connectlog(void)
+{
+ return open("/dev/tty", O_WRONLY | O_CLOEXEC);
+}
diff --git a/libc/syslog/openlog.cpp b/libc/syslog/openlog.cpp
new file mode 100644
index 00000000..9d1ae790
--- /dev/null
+++ b/libc/syslog/openlog.cpp
@@ -0,0 +1,42 @@
+/*******************************************************************************
+
+ Copyright(C) Jonas 'Sortie' Termansen 2014.
+
+ This file is part of the Sortix C Library.
+
+ The Sortix C Library 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 3 of the License, or (at your
+ option) any later version.
+
+ The Sortix C Library 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 the Sortix C Library. If not, see .
+
+ syslog/openlog.cpp
+ Opens the connection to the system log.
+
+*******************************************************************************/
+
+#include
+#include
+#include
+
+extern "C" void openlog(const char* identity, int option, int facility)
+{
+ // Remember the identity to report in the system log events.
+ free(__syslog_identity);
+ __syslog_identity = identity ? strdup(identity) : (char*) NULL;
+
+ // Remember the option and facility parameters for later use.
+ __syslog_option = option;
+ __syslog_facility = facility;
+
+ // Connect to the system more immediately if we are asked to and need to.
+ if ( (option & LOG_NDELAY) && __syslog_fd < 0 )
+ __syslog_fd = connectlog();
+}
diff --git a/libc/syslog/setlogmask.cpp b/libc/syslog/setlogmask.cpp
new file mode 100644
index 00000000..58a9a986
--- /dev/null
+++ b/libc/syslog/setlogmask.cpp
@@ -0,0 +1,33 @@
+/*******************************************************************************
+
+ Copyright(C) Jonas 'Sortie' Termansen 2014.
+
+ This file is part of the Sortix C Library.
+
+ The Sortix C Library 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 3 of the License, or (at your
+ option) any later version.
+
+ The Sortix C Library 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 the Sortix C Library. If not, see .
+
+ syslog/setlogmask.cpp
+ Sets the log priority mask.
+
+*******************************************************************************/
+
+#include
+
+extern "C" int setlogmask(int mask)
+{
+ int previous_mask = __syslog_mask;
+ if ( mask )
+ __syslog_mask = mask;
+ return previous_mask;
+}
diff --git a/libc/syslog/syslog.cpp b/libc/syslog/syslog.cpp
new file mode 100644
index 00000000..8ff0e76e
--- /dev/null
+++ b/libc/syslog/syslog.cpp
@@ -0,0 +1,34 @@
+/*******************************************************************************
+
+ Copyright(C) Jonas 'Sortie' Termansen 2014.
+
+ This file is part of the Sortix C Library.
+
+ The Sortix C Library 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 3 of the License, or (at your
+ option) any later version.
+
+ The Sortix C Library 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 the Sortix C Library. If not, see .
+
+ syslog/syslog.cpp
+ Logs a condition to the system log.
+
+*******************************************************************************/
+
+#include
+#include
+
+extern "C" void syslog(int priority, const char* format, ...)
+{
+ va_list ap;
+ va_start(ap, format);
+ vsyslog(priority, format, ap);
+ va_end(ap);
+}
diff --git a/libc/syslog/vsyslog.cpp b/libc/syslog/vsyslog.cpp
new file mode 100644
index 00000000..9041bc7c
--- /dev/null
+++ b/libc/syslog/vsyslog.cpp
@@ -0,0 +1,78 @@
+/*******************************************************************************
+
+ Copyright(C) Jonas 'Sortie' Termansen 2014.
+
+ This file is part of the Sortix C Library.
+
+ The Sortix C Library 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 3 of the License, or (at your
+ option) any later version.
+
+ The Sortix C Library 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 the Sortix C Library. If not, see .
+
+ syslog/vsyslog.cpp
+ Logs a condition to the system log.
+
+*******************************************************************************/
+
+#include
+#include
+#include
+#include
+#include
+#include
+
+extern "C" { char* __syslog_identity = NULL; }
+extern "C" { int __syslog_facility = LOG_USER; }
+extern "C" { int __syslog_fd = -1; }
+extern "C" { int __syslog_mask = LOG_UPTO(LOG_DEBUG); }
+extern "C" { int __syslog_option = 0; }
+
+// TODO: The transmitted string might be delivered in chunks using this dprintf
+// approach (plus there are multiple dprintf calls). We should buffer the
+// string fully before transmitting it.
+
+// TODO: The log entry format here is just whatever some other system does. We
+// should work out the Sortix system log semantics and adapt this to that.
+
+extern "C" void vsyslog(int priority, const char* format, va_list ap)
+{
+ // Drop the event if it doesn't fit the current priority mask.
+ if ( !(LOG_MASK(LOG_PRI(priority)) & __syslog_mask) )
+ return;
+
+ // Connect to the system log if a connection hasn't yet been established.
+ if ( __syslog_fd < 0 && (__syslog_fd = connectlog()) < 0 )
+ return;
+
+ // If no facility is given we'll use the default facility from openlog.
+ if ( !LOG_FAC(priority) )
+ priority |= __syslog_facility;
+
+ // Prepare a timestamp for the log event.
+ struct timespec now;
+ clock_gettime(CLOCK_REALTIME, &now);
+ struct tm tm;
+ gmtime_r(&now.tv_sec, &tm);
+ char timestamp[32];
+ strftime(timestamp, sizeof(timestamp), "%b %e %T", &tm);
+
+ // Include the process id of the current process if requested.
+ pid_t pid = (__syslog_option & LOG_PID) ? getpid() : 0;
+
+ // Transmit the event to the system log.
+ dprintf(__syslog_fd, "<%d>%s %s%s%.0jd%s: ",
+ priority,
+ timestamp,
+ __syslog_identity ? __syslog_identity : "",
+ "[" + !pid, (intmax_t) pid, "]" + !pid);
+ vdprintf(__syslog_fd, format, ap);
+ dprintf(__syslog_fd, "\n");
+}