54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
/*
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FUNCTION
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<<strerror_r>>---convert error number to string and copy to buffer
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INDEX
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strerror_r
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ANSI_SYNOPSIS
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#include <string.h>
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char *strerror_r(int <[errnum]>, char *<[buffer]>, size_t <[n]>);
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TRAD_SYNOPSIS
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#include <string.h>
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char *strerror_r(<[errnum]>, <[buffer]>, <[n]>)
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int <[errnum]>;
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char *<[buffer]>;
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size_t <[n]>;
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DESCRIPTION
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<<strerror_r>> converts the error number <[errnum]> into a
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string and copies the result into the supplied <[buffer]> for
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a length up to <[n]>, including the NUL terminator. The value of
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<[errnum]> is usually a copy of <<errno>>. If <<errnum>> is not a known
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error number, the result is the empty string.
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See <<strerror>> for how strings are mapped to <<errnum>>.
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RETURNS
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This function returns a pointer to a string. Your application must
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not modify that string.
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PORTABILITY
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<<strerror_r>> is a gnu extension.
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<<strerror_r>> requires no supporting OS subroutines.
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*/
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#undef __STRICT_ANSI__
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#include <errno.h>
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#include <string.h>
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char *
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_DEFUN (strerror_r, (errnum, buffer, n),
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int errnum _AND
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char *buffer _AND
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size_t n)
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{
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char *error;
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error = strerror (errnum);
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return strncpy (buffer, (const char *)error, n);
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}
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