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NAME
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syslog, sysfatal – system error messages
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SYNOPSIS
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#include <u.h>
#include <libc.h>
void syslog(int cons, char *logname, char *fmt, ...)
void sysfatal(char *fmt, ...)
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DESCRIPTION
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Sysfatal prints to standard error the name of the running program,
a colon and a space, the message described by the print(3) format
string fmt and subsequent arguments, and a newline. It then calls
exits(3) with the formatted message as argument. The program’s
name is the value of argv0, which will be set if the program uses
the arg(3) interface
to process its arguments. If argv0 is null, it is ignored and
the following colon and space are suppressed.
Syslog logs messages in the file named by logname in the directory
/usr/lib/plan9/log ; the file must already
exist and is opened append-only. Logname must contain no slashes.
The message is a line with several fields: the name of the machine
writing the message; the date and time; the message specified
by
the print(3) format fmt and any following arguments; and a final
newline. If cons is set or the log file cannot be opened, the
message is also printed on the system console. Syslog can be used
safely in multi-threaded programs.
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SOURCE
SEE ALSO
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