PROLOG

       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of this interface
       may differ (consult the corresponding Linux manual page for details of Linux behavior), or the  interface
       may not be implemented on Linux.

NAME

       isgraph, isgraph_l — test for a visible character

SYNOPSIS

       #include <ctype.h>

       int isgraph(int c);
       int isgraph_l(int c, locale_t locale);

DESCRIPTION

       For isgraph(): The functionality described on this reference page is aligned with the ISO C standard. Any
       conflict  between the requirements described here and the ISO C standard is unintentional. This volume of
       POSIX.1‐2008 defers to the ISO C standard.

       The isgraph() and isgraph_l() functions shall test whether c is a character of class graph in the current
       locale, or in the locale represented  by  locale,  respectively;  see  the  Base  Definitions  volume  of
       POSIX.1‐2008, Chapter 7, Locale.

       The c argument is an int, the value of which the application shall ensure is a character representable as
       an  unsigned  char  or  equal  to  the  value  of the macro EOF. If the argument has any other value, the
       behavior is undefined.

       The behavior  is  undefined  if  the  locale  argument  to  isgraph_l()  is  the  special  locale  object
       LC_GLOBAL_LOCALE or is not a valid locale object handle.

RETURN VALUE

       The  isgraph()  and  isgraph_l()  functions  shall  return  non-zero  if  c is a character with a visible
       representation; otherwise, they shall return 0.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       To ensure applications portability, especially across natural languages, only  these  functions  and  the
       functions  in  the  reference  pages  listed  in  the  SEE  ALSO  section  should  be  used for character
       classification.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       isalnum(), isalpha(),  isblank(),  iscntrl(),  isdigit(),  islower(),  isprint(),  ispunct(),  isspace(),
       isupper(), isxdigit(), setlocale(), uselocale()

       The Base Definitions volume of POSIX.1‐2008, Chapter 7, Locale, <ctype.h>, <locale.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition,
       Standard  for  Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electrical and Electronics Engineers,  Inc
       and  The  Open Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the event
       of any discrepancy between this version and the original IEEE and The Open Group Standard,  the  original
       IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at
       http://www.unix.org/online.html .

       Any  typographical  or formatting errors that appear in this page are most likely to have been introduced
       during  the  conversion  of  the  source  files  to  man  page  format.  To  report  such   errors,   see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                                   2013                                       ISGRAPH(3POSIX)