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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h_errno may be withdrawn in a future version.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)

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GAI_STRERROR(3P)					     POSIX Programmer's Manual						  GAI_STRERROR(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
gai_strerror - address and name information error description SYNOPSIS
#include <netdb.h> const char *gai_strerror(int ecode); DESCRIPTION
The gai_strerror() function shall return a text string describing an error value for the getaddrinfo() and getnameinfo() functions listed in the <netdb.h> header. When the ecode argument is one of the following values listed in the <netdb.h> header: [EAI_AGAIN] [EAI_BADFLAGS] [EAI_FAIL] [EAI_FAMILY] [EAI_MEMORY] [EAI_NONAME] [EAI_OVERFLOW] [EAI_SERVICE] [EAI_SOCKTYPE] [EAI_SYSTEM] the function return value shall point to a string describing the error. If the argument is not one of those values, the function shall return a pointer to a string whose contents indicate an unknown error. RETURN VALUE
Upon successful completion, gai_strerror() shall return a pointer to an implementation-defined string. ERRORS
No errors are defined. The following sections are informative. EXAMPLES
None. APPLICATION USAGE
None. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
getaddrinfo(), 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 GAI_STRERROR(3P)
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