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Look at the proper /etc/hosts file on windows.

Browse Source 
This is harder than it might initially seem, since the proper filename
depends on what the admin has decided to call the windows system directory,
which for all we know might be Q:\tralfamidore\slartibartfast.  And of course,
this being windows, there are twelve ways to do it, where you can pick a
nice one or a portable one, but not a really nice portable one.
This commit is contained in:
Nick Mathewson 2010-01-08 04:02:19 -05:00
parent 72dd666777
commit 66c02c7826
1 changed files with 38 additions and 5 deletions
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43
evdns.c
View File

@ -101,6 +101,8 @@
#ifdef WIN32
#include <winsock2.h>
#include <ws2tcpip.h>
#define _WIN32_IE 0x400
#include <shlobj.h>
#endif
#include <event2/dns.h>
@ -3391,6 +3393,31 @@ evdns_base_resolv_conf_parse(struct evdns_base *base, int flags, const char *con
return res;
}
static char *
evdns_get_default_hosts_filename(void)
{
#ifdef WIN32
/* Windows is a little coy about where it puts its configuration
* files. Sure, they're _usually_ in C:\windows\system32, but
* there's no reason in principle they couldn't be in
* W:\hoboken chicken emergency\
*/
char path[MAX_PATH+1];
static const char hostfile[] = "\\drivers\\etc\\hosts";
char *path_out;
int len_out;
if (! SHGetSpecialFolderPath(NULL, path, CSIDL_SYSTEM, 0))
return NULL;
len_out = strlen(path)+strlen(hostfile);
path_out = mm_malloc(len_out+1);
evutil_snprintf(path_out, len_out, "%s%s", path, hostfile);
return path_out;
#else
return mm_strdup("/etc/hosts");
#endif
}
static int
evdns_base_resolv_conf_parse_impl(struct evdns_base *base, int flags, const char *const filename) {
size_t n;
@ -3401,11 +3428,10 @@ evdns_base_resolv_conf_parse_impl(struct evdns_base *base, int flags, const char
log(EVDNS_LOG_DEBUG, "Parsing resolv.conf file %s", filename);
if (flags & DNS_OPTION_HOSTSFILE) {
#ifdef WIN32
evdns_base_load_hosts(base, NULL);
#else
evdns_base_load_hosts(base, "/etc/hosts");
#endif
char *fname = evdns_get_default_hosts_filename();
evdns_base_load_hosts(base, fname);
if (fname)
mm_free(fname);
}
if ((err = evutil_read_file(filename, &resolv, &n, 0)) < 0) {
@ -3648,6 +3674,7 @@ int
evdns_base_config_windows_nameservers(struct evdns_base *base)
{
int r;
char *fname;
if (base == NULL)
base = current_base;
if (base == NULL)
@ -3658,6 +3685,12 @@ evdns_base_config_windows_nameservers(struct evdns_base *base)
return 0;
}
r = load_nameservers_from_registry(base);
fname = evdns_get_default_hosts_filename();
evdns_base_load_hosts(base, fname);
if (fname)
mm_free(fname);
EVDNS_UNLOCK(base);
return r;
}