/*
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/*
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FUNCTION
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FUNCTION
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<<perror>>---print an error message on standard error
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<<perror>>---print an error message on standard error
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INDEX
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INDEX
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perror
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perror
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INDEX
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INDEX
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_perror_r
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_perror_r
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ANSI_SYNOPSIS
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ANSI_SYNOPSIS
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#include <stdio.h>
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#include <stdio.h>
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void perror(char *<[prefix]>);
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void perror(char *<[prefix]>);
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void _perror_r(void *<[reent]>, char *<[prefix]>);
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void _perror_r(void *<[reent]>, char *<[prefix]>);
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TRAD_SYNOPSIS
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TRAD_SYNOPSIS
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#include <stdio.h>
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#include <stdio.h>
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void perror(<[prefix]>)
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void perror(<[prefix]>)
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char *<[prefix]>;
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char *<[prefix]>;
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void _perror_r(<[reent]>, <[prefix]>)
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void _perror_r(<[reent]>, <[prefix]>)
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char *<[reent]>;
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char *<[reent]>;
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char *<[prefix]>;
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char *<[prefix]>;
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DESCRIPTION
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DESCRIPTION
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Use <<perror>> to print (on standard error) an error message
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Use <<perror>> to print (on standard error) an error message
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corresponding to the current value of the global variable <<errno>>.
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corresponding to the current value of the global variable <<errno>>.
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Unless you use <<NULL>> as the value of the argument <[prefix]>, the
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Unless you use <<NULL>> as the value of the argument <[prefix]>, the
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error message will begin with the string at <[prefix]>, followed by a
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error message will begin with the string at <[prefix]>, followed by a
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colon and a space (<<: >>). The remainder of the error message is one
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colon and a space (<<: >>). The remainder of the error message is one
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of the strings described for <<strerror>>.
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of the strings described for <<strerror>>.
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The alternate function <<_perror_r>> is a reentrant version. The
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The alternate function <<_perror_r>> is a reentrant version. The
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extra argument <[reent]> is a pointer to a reentrancy structure.
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extra argument <[reent]> is a pointer to a reentrancy structure.
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RETURNS
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RETURNS
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<<perror>> returns no result.
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<<perror>> returns no result.
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PORTABILITY
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PORTABILITY
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ANSI C requires <<perror>>, but the strings issued vary from one
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ANSI C requires <<perror>>, but the strings issued vary from one
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implementation to another.
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implementation to another.
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Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
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Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
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<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
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<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
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*/
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*/
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#include <stddef.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdio.h>
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#include <string.h>
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#include <string.h>
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void
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void
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_DEFUN (_perror_r, (ptr, s),
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_DEFUN (_perror_r, (ptr, s),
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struct _reent *ptr _AND
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struct _reent *ptr _AND
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_CONST char *s)
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_CONST char *s)
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{
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{
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char *error;
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char *error;
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if (s != NULL && *s != '\0')
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if (s != NULL && *s != '\0')
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{
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{
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fputs (s, _stderr_r (ptr));
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fputs (s, _stderr_r (ptr));
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fputs (": ", _stderr_r (ptr));
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fputs (": ", _stderr_r (ptr));
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}
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}
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if ((error = strerror (ptr->_errno)) != NULL)
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if ((error = strerror (ptr->_errno)) != NULL)
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fputs (error, _stderr_r (ptr));
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fputs (error, _stderr_r (ptr));
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fputc ('\n', _stderr_r (ptr));
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fputc ('\n', _stderr_r (ptr));
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}
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}
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#ifndef _REENT_ONLY
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#ifndef _REENT_ONLY
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void
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void
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_DEFUN (perror, (s),
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_DEFUN (perror, (s),
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_CONST char *s)
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_CONST char *s)
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{
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{
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_perror_r (_REENT, s);
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_perror_r (_REENT, s);
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}
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}
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#endif
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#endif
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