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Diffstat (limited to 'upstream/opensuse-tumbleweed/man3/sd-daemon.3')
| -rw-r--r-- | upstream/opensuse-tumbleweed/man3/sd-daemon.3 | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/upstream/opensuse-tumbleweed/man3/sd-daemon.3 b/upstream/opensuse-tumbleweed/man3/sd-daemon.3 new file mode 100644 index 00000000..c8d471be --- /dev/null +++ b/upstream/opensuse-tumbleweed/man3/sd-daemon.3 @@ -0,0 +1,117 @@ +'\" t +.TH "SD\-DAEMON" "3" "" "systemd 254" "sd-daemon" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +sd-daemon, SD_EMERG, SD_ALERT, SD_CRIT, SD_ERR, SD_WARNING, SD_NOTICE, SD_INFO, SD_DEBUG \- APIs for new\-style daemons +.SH "SYNOPSIS" +.sp +.ft B +.nf +#include <systemd/sd\-daemon\&.h> +.fi +.ft +.HP \w'\fBpkg\-config\ \-\-cflags\ \-\-libs\ libsystemd\fR\ 'u +\fBpkg\-config \-\-cflags \-\-libs libsystemd\fR +.SH "DESCRIPTION" +.PP +sd\-daemon\&.h +is part of +\fBlibsystemd\fR(3) +and provides APIs for new\-style daemons, as implemented by the +\fBsystemd\fR(1) +service manager\&. +.PP +See +\fBsd_listen_fds\fR(3), +\fBsd_notify\fR(3), +\fBsd_booted\fR(3), +\fBsd_is_fifo\fR(3), +\fBsd_watchdog_enabled\fR(3) +for more information about the functions implemented\&. In addition to these functions, a couple of logging prefixes are defined as macros: +.sp +.if n \{\ +.RS 4 +.\} +.nf +#define SD_EMERG "<0>" /* system is unusable */ +#define SD_ALERT "<1>" /* action must be taken immediately */ +#define SD_CRIT "<2>" /* critical conditions */ +#define SD_ERR "<3>" /* error conditions */ +#define SD_WARNING "<4>" /* warning conditions */ +#define SD_NOTICE "<5>" /* normal but significant condition */ +#define SD_INFO "<6>" /* informational */ +#define SD_DEBUG "<7>" /* debug\-level messages */ +.fi +.if n \{\ +.RE +.\} +.PP +These prefixes are intended to be used in conjunction with stderr\-based logging (or stdout\-based logging) as implemented by systemd\&. If a systemd service definition file is configured with +\fIStandardError=journal\fR +or +\fIStandardError=kmsg\fR +(and similar with +\fIStandardOutput=\fR), these prefixes can be used to encode a log level in lines printed\&. This is similar to the kernel +\fBprintk()\fR\-style logging\&. See +\fBklogctl\fR(2) +for more information\&. +.PP +The log levels are identical to +\fBsyslog\fR(3)\*(Aqs log level system\&. To use these prefixes simply prefix every line with one of these strings\&. A line that is not prefixed will be logged at the default log level SD_INFO\&. +.PP +\fBExample\ \&1.\ \&Hello World\fR +.PP +A daemon may log with the log level NOTICE by issuing this call: +.sp +.if n \{\ +.RS 4 +.\} +.nf +fprintf(stderr, SD_NOTICE "Hello World!\en"); +.fi +.if n \{\ +.RE +.\} +.SH "NOTES" +.PP +Functions described here are available as a shared library, which can be compiled against and linked to with the +\fBlibsystemd\fR\ \&\fBpkg-config\fR(1) +file\&. +.PP +The code described here uses +\fBgetenv\fR(3), which is declared to be not multi\-thread\-safe\&. This means that the code calling the functions described here must not call +\fBsetenv\fR(3) +from a parallel thread\&. It is recommended to only do calls to +\fBsetenv()\fR +from an early phase of the program when no other threads have been started\&. +.SH "SEE ALSO" +.PP +\fBsystemd\fR(1), +\fBsd_listen_fds\fR(3), +\fBsd_notify\fR(3), +\fBsd_booted\fR(3), +\fBsd_is_fifo\fR(3), +\fBsd_watchdog_enabled\fR(3), +\fBdaemon\fR(7), +\fBsystemd.service\fR(5), +\fBsystemd.socket\fR(5), +\fBfprintf\fR(3), +\fBpkg-config\fR(1) |