perror(3f)
NAME
perror, gerror, ierrno − get system error messages
SYNTAX
subroutine perror(string)
character*(*) string
subroutine gerror(string)
character*(*) string
character*(*) function gerror()
function ierrno()
DESCRIPTION
The perror subroutine will write a message to fortran logical unit 0 appropriate to the last detected system error. The string will be written preceding the standard error message.
The gerror subroutine returns the system error message in character variable string. The gerror subroutine may be called either as a subroutine or as a function.
The ierrno function will return the error number of the last detected system error. This number is updated only when an error actually occurs. Most routines and I/O statements that might generate such errors return an error code after the call; that value is a more reliable indicator of what caused the error condition.
RESTRICTIONS
The string in the call to perror can be no longer than 127 characters.
The length of the string returned by gerror is determined by the calling program.
NOTES
UNIX system error codes are described in intro(2). The f77 I/O error codes and their meanings are:
100“error in format”
101“illegal unit number”
102“formatted io not allowed”
103“unformatted io not allowed”
104“direct io not allowed”
105“sequential io not allowed”
106“can’t backspace file”
107“off beginning of record”
108“can’t stat file”
109“no * after repeat count”
110“off end of record”
111“truncation failed”
112“incomprehensible list input”
113“out of free space”
114“unit not connected”
115“read unexpected character”
116“blank logical input field”
117“’new’ file exists”
118“can’t find ’old’ file”
119“unknown system error”
120“requires seek ability”
121“illegal argument”
122“negative repeat count”
123“illegal operation for unit”
FILES
/usr/lib/libU77.a