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Annotation of 43BSDTahoe/man/man3/perror.3, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1980 Regents of the University of California.
        !             2: .\" All rights reserved.  The Berkeley software License Agreement
        !             3: .\" specifies the terms and conditions for redistribution.
        !             4: .\"
        !             5: .\"    @(#)perror.3    6.2 (Berkeley) 9/10/87
        !             6: .\"
        !             7: .TH PERROR 3  "September 10, 1987"
        !             8: .UC 4
        !             9: .SH NAME
        !            10: perror, sys_errlist, sys_nerr \- system error messages
        !            11: .SH SYNOPSIS
        !            12: .nf
        !            13: .B perror(string)
        !            14: .B char *string;
        !            15: .PP
        !            16: .B int sys_nerr;
        !            17: .B char *sys_errlist[];
        !            18: .fi
        !            19: .SH DESCRIPTION
        !            20: .I Perror
        !            21: produces a short error message on the standard error file
        !            22: describing the last error encountered during a call
        !            23: to the system from a C program.  If \fIstring\fP is non-NULL,
        !            24: it is printed, followed by a colon, followed by a space,
        !            25: followed by the message and a new-line.  Otherwise, just the
        !            26: message and the new-line are printed.  Most usefully, the argument
        !            27: string is the name of the program which incurred the error.
        !            28: The error number is taken from the external variable
        !            29: .I errno
        !            30: (see
        !            31: .IR intro (2)),
        !            32: which is set when errors occur but not cleared when
        !            33: non-erroneous calls are made.
        !            34: .PP
        !            35: To simplify variant formatting of messages, the vector of message strings
        !            36: .I sys_errlist
        !            37: is provided;
        !            38: .I errno
        !            39: can be used as an index in this table to get the
        !            40: message string without the newline.
        !            41: .I Sys_nerr
        !            42: is the number of messages provided for in the table;
        !            43: it should be checked because new error codes may be added to the system before
        !            44: they are added to the table.
        !            45: .SH "SEE ALSO"
        !            46: intro(2),
        !            47: psignal(3)

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