Hi everyone,
When recently working on a project involving lots of aliases per line
in the /etc/hosts file, I occurred a bug that only the first ten names
per line were resolvable.
The origin is found in libc's asr MAXTOKEN constant, which had a rather
small value of 10. To my knowledge it is used only in
getaddrinfo_async.c and gethostnamadr_async.c for /etc/hosts entries.
A small patch, which I was able to test successfully, increments this
value to 128 and documents the behavior. Happy to receive feedback.
Best,
Alvar
diff --git lib/libc/asr/asr_private.h lib/libc/asr/asr_private.h
index 64f044f12d1..442d569b44b 100644
--- lib/libc/asr/asr_private.h
+++ lib/libc/asr/asr_private.h
@@ -257,7 +257,7 @@ struct asr_query {
} sa;
int flags;
} ni;
-#define MAXTOKEN 10
+#define MAXTOKEN 128
} as;
};
diff --git lib/libc/net/gethostbyname.3 lib/libc/net/gethostbyname.3
index 06170c3c1a7..35c6ac53863 100644
--- lib/libc/net/gethostbyname.3
+++ lib/libc/net/gethostbyname.3
@@ -269,3 +269,12 @@ YP does not support any address families other than
.Dv AF_INET
and uses
the traditional database format.
+.Pp
+Only up to
+.Dv MAXTOKEN
+host or network names and aliases per line
+will be read from the
+.Pa /etc/hosts
+file
+.Pq currently 128 .
+Later names will be ignored.
diff --git share/man/man5/hosts.5 share/man/man5/hosts.5
index 8b3b7b699a8..4fad521f2c6 100644
--- share/man/man5/hosts.5
+++ share/man/man5/hosts.5
@@ -113,3 +113,9 @@ are limited to
characters
.Pq currently 1024 .
Longer lines will be ignored.
+.Pp
+There might be up to
+.Dv MAXTOKEN
+host or network names and aliases per line
+.Pq currently 128 .
+Later names will be ignored.
