h_errno(3p) [centos man page]

H_ERRNO(3P)						     POSIX Programmer's Manual						       H_ERRNO(3P)

PROLOG

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

NAME

       h_errno - error return value for network database operations

SYNOPSIS

       #include <netdb.h>

DESCRIPTION

       This method of returning errors is used only in connection with obsolescent functions.

       The <netdb.h> header provides a declaration of h_errno as a modifiable lvalue of type int.

       It is unspecified whether h_errno is a macro or an identifier declared with external linkage. If a macro definition is suppressed in  order
       to access an actual object, or a program defines an identifier with the name h_errno, the behavior is undefined.

RETURN VALUE

       None.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       Applications should obtain the definition of h_errno by the inclusion of the <netdb.h> header.

RATIONALE

       None.

FUTURE DIRECTIONS

       h_errno may be withdrawn in a future version.

SEE ALSO

       endhostent(), errno(), the Base Definitions volume of IEEE Std 1003.1-2001, <netdb.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical  and	Electronics  Engineers, Inc and The Open Group. 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.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003							       H_ERRNO(3P)

Check Out this Related Man Page

GETEUID(3P)                                                  POSIX Programmer's Manual                                                 GETEUID(3P)

PROLOG

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

NAME

       geteuid - get the effective user ID

SYNOPSIS

       #include <unistd.h>

       uid_t geteuid(void);

DESCRIPTION

       The geteuid() function shall return the effective user ID of the calling process.

RETURN VALUE

       The geteuid() function shall always be successful and no return value is reserved to indicate an error.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       getegid(), getgid(),  getuid(),  setegid(),  seteuid(),  setgid(),  setregid(),  setreuid(),  setuid(),  the  Base  Definitions  volume  of
       IEEE Std 1003.1-2001, <sys/types.h>, <unistd.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical  and  Electronics  Engineers, Inc and The Open Group. 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.opengroup.org/unix/online.html .

IEEE
/The Open Group                                                    2003                                                            GETEUID(3P)

Linux and UNIX Man Pages

h_errno(3p) [centos man page]

Check Out this Related Man Page