diff options
Diffstat (limited to 'contrib/perl5/ext/Sys/Hostname')
| -rw-r--r-- | contrib/perl5/ext/Sys/Hostname/Hostname.pm | 153 | ||||
| -rw-r--r-- | contrib/perl5/ext/Sys/Hostname/Hostname.xs | 76 | ||||
| -rw-r--r-- | contrib/perl5/ext/Sys/Hostname/Makefile.PL | 8 |
3 files changed, 237 insertions, 0 deletions
diff --git a/contrib/perl5/ext/Sys/Hostname/Hostname.pm b/contrib/perl5/ext/Sys/Hostname/Hostname.pm new file mode 100644 index 0000000..1efc897 --- /dev/null +++ b/contrib/perl5/ext/Sys/Hostname/Hostname.pm @@ -0,0 +1,153 @@ +package Sys::Hostname; + +use strict; + +use Carp; + +require Exporter; +use XSLoader (); +require AutoLoader; + +our @ISA = qw/ Exporter AutoLoader /; +our @EXPORT = qw/ hostname /; + +our $VERSION = '1.1'; + +our $host; + +XSLoader::load 'Sys::Hostname', $VERSION; + +sub hostname { + + # method 1 - we already know it + return $host if defined $host; + + # method 1' - try to ask the system + $host = ghname(); + return $host if defined $host; + + if ($^O eq 'VMS') { + + # method 2 - no sockets ==> return DECnet node name + eval { local $SIG{__DIE__}; $host = (gethostbyname('me'))[0] }; + if ($@) { return $host = $ENV{'SYS$NODE'}; } + + # method 3 - has someone else done the job already? It's common for the + # TCP/IP stack to advertise the hostname via a logical name. (Are + # there any other logicals which TCP/IP stacks use for the host name?) + $host = $ENV{'ARPANET_HOST_NAME'} || $ENV{'INTERNET_HOST_NAME'} || + $ENV{'MULTINET_HOST_NAME'} || $ENV{'UCX$INET_HOST'} || + $ENV{'TCPWARE_DOMAINNAME'} || $ENV{'NEWS_ADDRESS'}; + return $host if $host; + + # method 4 - does hostname happen to work? + my($rslt) = `hostname`; + if ($rslt !~ /IVVERB/) { ($host) = $rslt =~ /^(\S+)/; } + return $host if $host; + + # rats! + $host = ''; + Carp::croak "Cannot get host name of local machine"; + + } + elsif ($^O eq 'MSWin32') { + ($host) = gethostbyname('localhost'); + chomp($host = `hostname 2> NUL`) unless defined $host; + return $host; + } + elsif ($^O eq 'epoc') { + $host = 'localhost'; + return $host; + } + else { # Unix + # is anyone going to make it here? + + # method 2 - syscall is preferred since it avoids tainting problems + # XXX: is it such a good idea to return hostname untainted? + eval { + local $SIG{__DIE__}; + require "syscall.ph"; + $host = "\0" x 65; ## preload scalar + syscall(&SYS_gethostname, $host, 65) == 0; + } + + # method 2a - syscall using systeminfo instead of gethostname + # -- needed on systems like Solaris + || eval { + local $SIG{__DIE__}; + require "sys/syscall.ph"; + require "sys/systeminfo.ph"; + $host = "\0" x 65; ## preload scalar + syscall(&SYS_systeminfo, &SI_HOSTNAME, $host, 65) != -1; + } + + # method 3 - trusty old hostname command + || eval { + local $SIG{__DIE__}; + local $SIG{CHLD}; + $host = `(hostname) 2>/dev/null`; # bsdish + } + + # method 4 - use POSIX::uname(), which strictly can't be expected to be + # correct + || eval { + local $SIG{__DIE__}; + require POSIX; + $host = (POSIX::uname())[1]; + } + + # method 5 - sysV uname command (may truncate) + || eval { + local $SIG{__DIE__}; + $host = `uname -n 2>/dev/null`; ## sysVish + } + + # method 6 - Apollo pre-SR10 + || eval { + local $SIG{__DIE__}; + my($a,$b,$c,$d); + ($host,$a,$b,$c,$d)=split(/[:\. ]/,`/com/host`,6); + } + + # bummer + || Carp::croak "Cannot get host name of local machine"; + + # remove garbage + $host =~ tr/\0\r\n//d; + $host; + } +} + +1; + +__END__ + +=head1 NAME + +Sys::Hostname - Try every conceivable way to get hostname + +=head1 SYNOPSIS + + use Sys::Hostname; + $host = hostname; + +=head1 DESCRIPTION + +Attempts several methods of getting the system hostname and +then caches the result. It tries the first available of the C +library's gethostname(), C<`$Config{aphostname}`>, uname(2), +C<syscall(SYS_gethostname)>, C<`hostname`>, C<`uname -n`>, +and the file F</com/host>. If all that fails it C<croak>s. + +All NULs, returns, and newlines are removed from the result. + +=head1 AUTHOR + +David Sundstrom E<lt>F<sunds@asictest.sc.ti.com>E<gt> + +Texas Instruments + +XS code added by Greg Bacon E<lt>F<gbacon@cs.uah.edu>E<gt> + +=cut + diff --git a/contrib/perl5/ext/Sys/Hostname/Hostname.xs b/contrib/perl5/ext/Sys/Hostname/Hostname.xs new file mode 100644 index 0000000..f104383 --- /dev/null +++ b/contrib/perl5/ext/Sys/Hostname/Hostname.xs @@ -0,0 +1,76 @@ +#include "EXTERN.h" +#include "perl.h" +#include "XSUB.h" + +#if defined(I_UNISTD) && defined(HAS_GETHOSTNAME) +# include <unistd.h> +#endif + +/* a reasonable default */ +#ifndef MAXHOSTNAMELEN +# define MAXHOSTNAMELEN 256 +#endif + +/* swiped from POSIX.xs */ +#if defined(__VMS) && !defined(__POSIX_SOURCE) +# if ((__VMS_VER >= 70000000) && (__DECC_VER >= 50200000)) || (__CRTL_VER >= 70000000) +# include <utsname.h> +# endif +#endif + +#ifdef I_SYSUTSNAME +# include <sys/utsname.h> +#endif + +MODULE = Sys::Hostname PACKAGE = Sys::Hostname + +void +ghname() + PREINIT: + IV retval = -1; + SV *sv; + PPCODE: + EXTEND(SP, 1); +#ifdef HAS_GETHOSTNAME + { + char tmps[MAXHOSTNAMELEN]; + retval = PerlSock_gethostname(tmps, sizeof(tmps)); + sv = newSVpvn(tmps, strlen(tmps)); + } +#else +# ifdef HAS_PHOSTNAME + { + PerlIO *io; + char tmps[MAXHOSTNAMELEN]; + char *p = tmps; + char c; + io = PerlProc_popen(PHOSTNAME, "r"); + if (!io) + goto check_out; + while (PerlIO_read(io, &c, sizeof(c)) == 1) { + if (isSPACE(c) || p - tmps >= sizeof(tmps)) + break; + *p++ = c; + } + PerlProc_pclose(io); + *p = '\0'; + retval = 0; + sv = newSVpvn(tmps, strlen(tmps)); + } +# else +# ifdef HAS_UNAME + { + struct utsname u; + if (PerlEnv_uname(&u) == -1) + goto check_out; + sv = newSVpvn(u.nodename, strlen(u.nodename)); + retval = 0; + } +# endif +# endif +#endif + check_out: + if (retval == -1) + XSRETURN_UNDEF; + else + PUSHs(sv_2mortal(sv)); diff --git a/contrib/perl5/ext/Sys/Hostname/Makefile.PL b/contrib/perl5/ext/Sys/Hostname/Makefile.PL new file mode 100644 index 0000000..a0892f6 --- /dev/null +++ b/contrib/perl5/ext/Sys/Hostname/Makefile.PL @@ -0,0 +1,8 @@ +use ExtUtils::MakeMaker; + +WriteMakefile( + NAME => 'Sys::Hostname', + VERSION_FROM => 'Hostname.pm', + MAN3PODS => {}, # Pods will be built by installman. + XSPROTOARG => '-noprototypes', +); |
