1 files changed, 116 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libugly/gethostent.c b/mdk-stage1/dietlibc/libugly/gethostent.c
new file mode 100644
index 000000000..fe92beacf
--- /dev/null
+++ b/mdk-stage1/dietlibc/libugly/gethostent.c
@@ -0,0 +1,116 @@
+#include <unistd.h>
+#include <fcntl.h>
+#include <netdb.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <netinet/in.h>
+#include <string.h>
+#include <ctype.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include "dietfeatures.h"
+
+static char* hostmap=0;
+static unsigned int hostlen;
+
+static char *cur;
+
+/* ::1	localhost6	alias1 alias2		# internet protocol, pseudo protocol number */
+struct hostent* gethostent_r(char* buf, int len) {
+  char *dest;
+  struct hostent* pe=(struct hostent*)buf;
+  char* last;
+  char* max=buf+len;
+  int aliasidx;
+  if (!hostmap) {
+    int hostfd=open(_PATH_HOSTS,O_RDONLY);
+    if (hostfd<0) return 0;
+    hostlen=lseek(hostfd,0,SEEK_END);
+    hostmap=mmap(0,hostlen,PROT_READ|PROT_WRITE,MAP_PRIVATE,hostfd,0);
+    if ((long)hostmap==(-1)) { close(hostfd); hostmap=0; goto error; }
+    close(hostfd); hostfd=-1;
+    cur=hostmap;
+  }
+  last=hostmap+hostlen;
+again:
+  if ((size_t)len<sizeof(struct hostent)+11*sizeof(char*)) goto nospace;
+  dest=buf+sizeof(struct hostent);
+  pe->h_name=0;
+  pe->h_aliases=(char**)dest; pe->h_aliases[0]=0; dest+=10*sizeof(char*);
+  pe->h_addr_list=(char**)dest; dest+=2*sizeof(char**);
+  if (cur>=last) return 0;
+  if (*cur=='#' || *cur=='\n') goto parseerror;
+  /* first, the ip number */
+  pe->h_name=cur;
+  while (cur<last && !isspace(*cur)) cur++;
+  if (cur>=last) return 0;
+  if (*cur=='\n') goto parseerror;
+  {
+    char save=*cur;
+    *cur=0;
+    pe->h_addr_list[0]=dest;
+    pe->h_addr_list[1]=0;
+    if (max-dest<16) goto nospace;
+    if (inet_pton(AF_INET6,pe->h_name,dest)>0) {
+      pe->h_addrtype=AF_INET6;
+      pe->h_length=16;
+      dest+=16;
+    } else if (inet_pton(AF_INET,pe->h_name,dest)>0) {
+      pe->h_addrtype=AF_INET;
+      pe->h_length=4;
+      dest+=4;
+    } else {
+      *cur=save;
+      goto parseerror;
+    }
+    *cur=save;
+  }
+  ++cur;
+  /* now the aliases */
+  for (aliasidx=0;aliasidx<9;++aliasidx) {
+    while (cur<last && isblank(*cur)) ++cur;
+    pe->h_aliases[aliasidx]=cur;
+    while (cur<last && !isspace(*cur)) ++cur;
+    {
+      char *from=pe->h_aliases[aliasidx];
+      int len=cur-from;
+      if (max-dest<len+2) goto nospace;
+      pe->h_aliases[aliasidx]=dest;
+      memmove(dest,from,(size_t)(cur-from));
+      dest+=len;
+      *dest=0; ++dest;
+    }
+    if (*cur=='\n') { ++cur; ++aliasidx; break; }
+    if (cur>=last || !isblank(*cur)) break;
+    cur++;
+  }
+  pe->h_aliases[aliasidx]=0;
+  pe->h_name=pe->h_aliases[0];
+  pe->h_aliases++;
+  return pe;
+parseerror:
+  while (cur<last && *cur!='\n') cur++;
+  cur++;
+  goto again;
+nospace:
+  errno=ERANGE;
+  goto __error;
+error:
+  errno=ENOMEM;
+__error:
+  if (hostmap!=(char*)-1) munmap(hostmap,hostlen);
+  hostmap=(char*)-1;
+  return 0;
+}
+
+void sethostent(int stayopen) {
+  (void)stayopen;
+  cur=hostmap;
+}
+
+void endhostent(void) {
+  if (hostmap!=(char*)-1) munmap(hostmap,hostlen);
+  hostmap=0;
+}
+