SD−DAEMON - Online Linux Manual PageSection : 3
Updated :
Source : systemd 250
Note : sd-daemon

---

NAMEsd-daemon, SD_EMERG, SD_ALERT, SD_CRIT, SD_ERR, SD_WARNING, SD_NOTICE, SD_INFO, SD_DEBUG − APIs for new−style daemons

---

SYNOPSIS#include <systemd/sd−daemon​.h>pkg−config −−cflags −−libs libsystemd

---

DESCRIPTIONsd−daemon​.h provides APIs for new−style daemons, as implemented by the systemd(1) service manager​. See sd_listen_fds(3), sd_notify(3), sd_booted(3), sd_is_fifo(3), sd_watchdog_enabled(3) for more information about the functions implemented​. In addition to these functions, a couple of logging prefixes are defined as macros: #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 */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 StandardError=journal or StandardError=kmsg (and similar with StandardOutput=), these prefixes can be used to encode a log level in lines printed​. This is similar to the kernel printk()−style logging​. See klogctl(2) for more information​. The log levels are identical to syslog(3)'s 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​. Example ​1. ​Hello World A daemon may log with the log level NOTICE by issuing this call: fprintf(stderr, SD_NOTICE "Hello World!\n");

---

NOTESThese APIs are implemented as a shared library, which can be compiled and linked to with the libsystemd ​pkg-config(1) file​.

---

SEE ALSOsystemd(1), sd_listen_fds(3), sd_notify(3), sd_booted(3), sd_is_fifo(3), sd_watchdog_enabled(3), daemon(7), systemd.service(5), systemd.socket(5), fprintf(3), pkg-config(1) 0

---

Johanes Gumabo

---

Data Size   :   9,508 byte
man-SD_EMERG.3Build   :   2024-12-05, 20:55   :  
Visitor Screen   :   x
Visitor Counter ( page / site )   :   2 / 170,645
Visitor ID   :     :  
Visitor IP   :   3.129.71.13   :  
Visitor Provider   :   AMAZON-02   :  
Provider Position ( lat x lon )   :   39.962500 x -83.006100   :   x
Provider Accuracy Radius ( km )   :   1000   :  
Provider City   :   Columbus   :  
Provider Province   :   Ohio ,   :   ,
Provider Country   :   United States   :  
Provider Continent   :   North America   :  
Visitor Recorder   :   Version   :  
Visitor Recorder   :   Library   :  
Online Linux Manual Page   :   Version   :   Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 24.12.05
Online Linux Manual Page   :   Library   :   lib_c - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Online Linux Manual Page   :   Library   :   lib_m - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Data Base   :   Version   :   Online Linux Manual Page Database - 24.04.13 - march=x86-64 - mtune=generic - fedora-38
Data Base   :   Library   :   lib_c - 23.02.07 - march=x86-64 - mtune=generic - fedora.36

---

Very long time ago, I have the best tutor, Wenzel Svojanovsky . If someone knows the email address of Wenzel Svojanovsky , please send an email to johanes_gumabo@yahoo.co.id .

---

If error, please print screen and send to johanes_gumabo@yahoo.co.id
Under development. Support me via PayPal.

---