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+'\" et
+.TH INET_ADDR "3P" 2013 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.SH 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.
+
+.SH NAME
+inet_addr,
+inet_ntoa
+\(em IPv4 address manipulation
+.SH SYNOPSIS
+.LP
+.nf
+#include <arpa/inet.h>
+.P
+in_addr_t inet_addr(const char *\fIcp\fP);
+char *inet_ntoa(struct in_addr \fIin\fP);
+.fi
+.SH DESCRIPTION
+The
+\fIinet_addr\fR()
+function shall convert the string pointed to by
+.IR cp ,
+in the standard IPv4 dotted decimal notation, to an integer value
+suitable for use as an Internet address.
+.P
+The
+\fIinet_ntoa\fR()
+function shall convert the Internet host address specified by
+.IR in
+to a string in the Internet standard dot notation.
+.P
+The
+\fIinet_ntoa\fR()
+function need not be thread-safe.
+.P
+All Internet addresses shall be returned in network order (bytes
+ordered from left to right).
+.P
+Values specified using IPv4 dotted decimal notation take one of the
+following forms:
+.IP "\fRa.b.c.d\fP" 10
+When four parts are specified, each shall be interpreted as a byte of
+data and assigned, from left to right, to the four bytes of an Internet
+address.
+.IP "\fRa.b.c\fP" 10
+When a three-part address is specified, the last part shall be
+interpreted as a 16-bit quantity and placed in the rightmost two bytes
+of the network address. This makes the three-part address format
+convenient for specifying Class B network addresses as
+.BR \(dq128.net.host\(dq .
+.IP "\fRa.b\fP" 10
+When a two-part address is supplied, the last part shall be interpreted
+as a 24-bit quantity and placed in the rightmost three bytes of the
+network address. This makes the two-part address format convenient for
+specifying Class A network addresses as
+.BR \(dqnet.host\(dq .
+.IP "\fRa\fP" 10
+When only one part is given, the value shall be stored directly in the
+network address without any byte rearrangement.
+.P
+All numbers supplied as parts in IPv4 dotted decimal notation may be
+decimal, octal, or hexadecimal, as specified in the ISO\ C standard (that is, a
+leading 0x or 0X implies hexadecimal; otherwise, a leading
+.BR '0'
+implies octal; otherwise, the number is interpreted as decimal).
+.SH "RETURN VALUE"
+Upon successful completion,
+\fIinet_addr\fR()
+shall return the Internet address. Otherwise, it shall return (\c
+.BR in_addr_t )(\(mi1).
+.P
+The
+\fIinet_ntoa\fR()
+function shall return a pointer to the network address in Internet
+standard dot notation.
+.SH ERRORS
+No errors are defined.
+.LP
+.IR "The following sections are informative."
+.SH "EXAMPLES"
+None.
+.SH "APPLICATION USAGE"
+The return value of
+\fIinet_ntoa\fR()
+may point to static data that may be overwritten by subsequent calls to
+\fIinet_ntoa\fR().
+.SH "RATIONALE"
+None.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+.IR "\fIendhostent\fR\^(\|)",
+.IR "\fIendnetent\fR\^(\|)"
+.P
+The Base Definitions volume of POSIX.1\(hy2008,
+.IR "\fB<arpa_inet.h>\fP"
+.SH 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 .