Bug #13443 Updated: gethostbyname returns the name not the IP addr.

ID: 13443 User updated by: brooks@netgate.net Reported By: brooks@netgate.net Status: Duplicate Bug Type: Unknown/Other Function Operating System: BSDI 4.1 PHP Version: 4.0.6 New Comment: I'm with you... The program below works fine, as does dig, nslookup, perl, etc. So, I'm at a loss as to why PHP doesn't work. I sent an email to the BSDI users list and everyone is convinced that you MUST run a local named server for PHP to work correctly. This makes no sense (to me). vp3: {4} % ldd ../cgi-bin/php libdl.so => /shlib/libdl.so (0x48169000) libm.so => /shlib/libm.so.0.0 (0x4816d000) libgcc.so.1 => /shlib/libgcc.so.1 (0x4817f000) libc.so.1 => /shlib/libc.so.1 (0x4818b000) vp3: {5} % ldd gethostbyname libgcc.so.1 => /shlib/libgcc.so.1 (0x48052000) libc.so.1 => /shlib/libc.so.1 (0x4805e000) Previous Comments: ------------------------------------------------------------------------ [2001-09-27 02:22:02] venaas@php.net PHP uses the resolver library(ies) installed on your system, just as the other software installed. It is possible that you have several libraries and nslookup uses something else though. If you have nsswitch.conf or similar you should make sure that is okay, but if for instance ping hostname works (where hostname is not in /etc/hosts or NIS...), it should be okay. Please check that resolv.conf is readable for all. You aren't running PHP in chroot environment, are you? ------------------------------------------------------------------------ [2001-09-26 17:43:08] jimw@php.net php does not require a local dns server to be running unless your system's C library gethostbyname() call does (which seems extraordinarily unlikely). here's a small c program you can use to test your system's gethostbyname(). if it says that no ip address is found, that's the exact same situation in which php's gethostbyname() will return the original hostname. #include <stdlib.h> #include <stdio.h> #include <netdb.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> int main(int argc, char **argv) { struct hostent *host; struct in_addr in; if (argc != 2) { fprintf(stderr,"usage: %s hostname\n", argv[0]); exit(1); } host = gethostbyname(argv[1]); if (host->h_length) { memcpy(&in.s_addr, *(host->h_addr_list), sizeof(in.s_addr)); fprintf(stderr,"%s\n",inet_ntoa(in)); } else { fprintf(stderr,"no ip address found for %s\n", argv[1]); exit(1); } exit(0); } ------------------------------------------------------------------------ [2001-09-26 17:33:02] brooks@netgate.net Does PHP require a local bind running? Everything seems to point in that direction. The resolver libs are doing a lookup to the address of 0.0.0.0 vs. the servers as configured in resolv.conf. ;; Querying server (# 1) address = 0.0.0.0 ------------------------------------------------------------------------ [2001-09-25 17:16:30] brooks@netgate.net IMHO this is not the same as #13423, which is why I didn't list it in the original report. Although the data returned is the same (hostname instead of IP address) the reason for the failure is seems very different. ------------------------------------------------------------------------ [2001-09-25 16:45:51] jimw@php.net duplicate of 13423, among the others listed in the report. gethostbyname() returns the hostname it is passed when the C-level gethostbyname() call fails. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/?id=13443 Edit this bug report at http://bugs.php.net/?id=13443&edit=1