HPUX ferror[3s]

 ferror(3S)                                                       ferror(3S)





 NAME
      ferror(), feof(), clearerr() - stream status inquiries

 SYNOPSIS
      #include <stdio.h>

      int ferror(FILE *stream);

      int feof(FILE *stream);

      void clearerr(FILE *stream);

 DESCRIPTION
      ferror()       Returns non-zero when an I/O error has previously
                     occurred reading from or writing to the named stream,
                     otherwise zero.  Unless cleared by clearerr(), or
                     unless the specific stdio routine so indicates, the
                     error indication lasts until the stream is closed.

      feof()         Returns non-zero when EOF has previously been detected
                     reading the named input stream, otherwise zero.

      clearerr()     Resets the error indicator and EOF indicator on the
                     named stream to zero.

 WARNINGS
      All these routines are implemented both as library functions and as
      macros.  The macro versions, which are used by default, are defined in
      <stdio.h>.  To obtain the library function, either use a #undef to
      remove the macro definition or, if compiling in ANSI-C mode, enclose
      the function name in parentheses or use the function address.  The
      following example illustrates each of these methods :

           #include <stdio.h>
           #undef ferror
               ...
           main()
           {
                int (*find_error()) ();
                    ...
                return_val=ferror(fd);
                    ...
                return_val=(feof)(fd1);
                    ...
                find_error = feof;
           };

 SEE ALSO
      open(2), fopen(3S).





 Hewlett-Packard Company            - 1 -     HP-UX Release 9.0: August 1992






 ferror(3S)                                                       ferror(3S)





 STANDARDS CONFORMANCE
      ferror(): AES, SVID2, XPG2, XPG3, XPG4, FIPS 151-2, POSIX.1, ANSI C

      clearerr(): AES, SVID2, XPG2, XPG3, XPG4, FIPS 151-2, POSIX.1, ANSI C

      feof(): AES, SVID2, XPG2, XPG3, XPG4, FIPS 151-2, POSIX.1, ANSI C
















































 Hewlett-Packard Company            - 2 -     HP-UX Release 9.0: August 1992