perror(3F)

NAME
     perror, gerror, ierrno, strerror - get system error messages

SYNOPSIS
     subroutine perror (string)
     character*(*) string

     subroutine gerror (string)
     character*(*) string

     character*(*) function gerror()

     function ierrno()

     subroutine strerror (ierror_num, string)
     integer ierror_num
     character*(*) string


DESCRIPTION
     Perror will write a message to fortran logical unit 0 appropriate to the
     last detected system error.  String will be written preceding the
     standard error message.

     Gerror returns the system error message in character variable string.
     Gerror may be called either as a subroutine or as a function.

     Ierrno 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.

     Strerror is the same as gerror except you pass in an explicit error
     number.

FILES
     /usr/lib/libI77.a

SEE ALSO
     intro(2), perror(3F)
     D. L. Wasley, Introduction to the f77 I/O Library

BUGS
     String in the call to perror can be no longer than 127 characters.

     The length of the string returned by gerror and strerror is determined by
     the calling program.

     Error numbers > 100 are mapped to Fortran errors.  Thus you may not be
     able to retrieve the UNIX errors > 100 using these functions.

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  ``out of space for i/o unit table''
          102  ``formatted i/o not allowed''
          103  ``unformatted i/o not allowed''
          104  ``direct i/o not allowed''
          105  ``sequential i/o not allowed''
          106  ``can't backspace file''
          107  ``null file name''
          108  ``can't stat file''
          109  ``file already connected''
          110  ``off end of record''
          111  ``truncation failed in end file''
          112  ``incomprehensible list input''
          113  ``out of free space''
          114  ``unit not connected''
          115  ``read unexpected character''
          116  ``blank logical input field''
          117  ``bad variable type''
          118  ``bad namelist name''
          119  ``variable not in namelist''
          120  ``no end record''
          121  ``namelist subscript out of range''
          122  ``negative repeat count''
          123  ``illegal operation for unit''
          124  ``off beginning of record''
          125  ``no * after repeat count''
          126  ``'new' file exists''
          127  ``can't find 'old' file''
          128  ``unknown system error''
          129  ``requires seek ability''
          130  ``illegal argument''
          131  ``duplicate key value on write''
          132  ``indexed file not open''
          133  ``bad isam argument''
          134  ``bad key description''
          135  ``too many open indexed files''
          136  ``corrupted isam file''
          137  ``isam file not opened for exclusive access''
          138  ``record locked''
          139  ``key already exists''
          140  ``cannot delete primary key''
          141  ``beginning or end of file reached''
          142  ``cannot find requested record''
          143  ``current record not defined''
          144  ``isam file is exclusively locked''
          145  ``filename too long''
          146  ``cannot create lock file''
          147  ``record too long''
          148  ``key structure does not match file structure''
          149  ``direct access on an indexed file not allowed''
          150  ``keyed access on a sequential file not allowed''
          151  ``keyed access on a relative file not allowed''
          152  ``append access on an indexed file not allowed''
          153  ``must specify record length''
          154  ``key field value type does not match key type''
          155  ``character key field value length too long''
          156  ``fixed record on sequential file not allowed''
          157  ``variable records allowed only on unformatted sequential
          file''
          158  ``stream records allowed only on formatted sequential file''
          159  ``maximum number of records in direct access file exceeded''
          160  ``attempt to create or write to a readonly file''
          161  ``must specify key descriptions''
          162  ``carriage control not allowed for unformatted units''
          163  ``indexed files only''
          164  ``cannot use on indexed file''
          165  ``cannot use on indexed or append file''
          166  ``error in closing file''
          167  ``invalid code in format specification''
          168  ``invalid record number in direct access file''
          169  ``cannot have endfile record on non-sequential file''
          170  ``cannot position within current file''
          171  ``cannot have sequential records on direct access file''
          172  ``cannot find namelist in input file''
          173  ``cannot read from stdout''
          174  ``cannot write to stdin''
          175  ``stat call failed in f77inode''
          181  ``Direct unformatted I/O not allowed.''
          182  ``cannot open a directory''
          183  ``subscript out of bounds''
          184  ``function not declared as varargs''
          185  ``internal error'' -- may be due to illegal vararg usage.

ORIGIN
     MIPS Computer Systems