from small one page howto to huge articles all in one place
poll results
Last additions:
May 25th. 2007:
April, 26th. 2006:
| You are here: manpages
ERROR
Section: Linux Programmer's Manual (3)
Updated: 2010-08-29
Index
Return to Main Contents
NAME
error, error_at_line, error_message_count, error_on_per_line, error_print_progname - glibc error reporting functions
SYNOPSIS
#include <error.h>
void error(int status, int errnum, const char *format, ...);
void error_at_line(int status, int errnum, const char *filename,
unsigned int linenum, const char *format, ...);
extern unsigned int error_message_count;
extern int error_one_per_line;
extern void (* error_print_progname) (void);
DESCRIPTION
error()
is a general error-reporting function.
It flushes
stdout,
and then outputs to
stderr
the program name, a colon and a space, the message specified by the
printf(3)-style
format string format, and, if errnum is
nonzero, a second colon and a space followed by the string given by
strerror(errnum).
Any arguments required for
format
should follow
format
in the argument list.
The output is terminated by a newline character.
The program name printed by
error()
is the value of the global variable
program_invocation_name(3).
program_invocation_name
initially has the same value as
main()'s
argv[0].
The value of this variable can be modified to change the output of
error().
If status has a nonzero value, then
error()
calls
exit(3)
to terminate the program using the given value as the exit status.
The
error_at_line()
function is exactly the same as
error(),
except for the addition of the arguments
filename
and
linenum.
The output produced is as for
error(),
except that after the program name are written: a colon, the value of
filename,
a colon, and the value of
linenum.
The preprocessor values __LINE__ and
__FILE__ may be useful when calling
error_at_line(),
but other values can also be used.
For example, these arguments could refer to a location in an input file.
If the global variable error_one_per_line is set nonzero,
a sequence of
error_at_line()
calls with the
same value of filename and linenum will result in only
one message (the first) being output.
The global variable error_message_count counts the number of
messages that have been output by
error()
and
error_at_line().
If the global variable error_print_progname
is assigned the address of a function
(i.e., is not NULL), then that function is called
instead of prefixing the message with the program name and colon.
The function should print a suitable string to
stderr.
CONFORMING TO
These functions and variables are GNU extensions, and should not be
used in programs intended to be portable.
SEE ALSO
err(3),
errno(3),
exit(3),
perror(3),
program_invocation_name(3),
strerror(3)
COLOPHON
This page is part of release 3.27 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- CONFORMING TO
-
- SEE ALSO
-
- COLOPHON
-
Please read "Why adblockers are badwww.cars2fast4u.de
|
Other free services .
.
| 
|
|
- Running on 
-
:
: 
