diff options
author | usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2016-02-25 10:58:02 +0000 |
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committer | usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2016-02-25 10:58:02 +0000 |
commit | e41ee7cf3347ced6e689c198dbf3c5900009d70f (patch) | |
tree | 36ef38a948fb89793748d4f78ba6334efec214fb /ext/socket/socket.c | |
parent | abe1b00d16837ce5a1fc25167cb91489dac26bb2 (diff) |
merge revision(s) 53677: [Backport #11877]
* ext/socket/socket.c (sock_gethostname): support unlimited size
hostname.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@53936 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext/socket/socket.c')
-rw-r--r-- | ext/socket/socket.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/ext/socket/socket.c b/ext/socket/socket.c index 05924323ba..13006abdb3 100644 --- a/ext/socket/socket.c +++ b/ext/socket/socket.c @@ -1000,14 +1000,28 @@ sock_gethostname(VALUE obj) #ifndef HOST_NAME_MAX # define HOST_NAME_MAX 1024 #endif - char buf[HOST_NAME_MAX+1]; + long len = HOST_NAME_MAX; + VALUE name; rb_secure(3); - if (gethostname(buf, (int)sizeof buf - 1) < 0) - rb_sys_fail("gethostname(3)"); - - buf[sizeof buf - 1] = '\0'; - return rb_str_new2(buf); + name = rb_str_new(0, len); + while (gethostname(RSTRING_PTR(name), len) < 0) { + int e = errno; + switch (e) { + case ENAMETOOLONG: +#ifdef __linux__ + case EINVAL: + /* glibc before version 2.1 uses EINVAL instead of ENAMETOOLONG */ +#endif + break; + default: + rb_syserr_fail(e, "gethostname(3)"); + } + rb_str_modify_expand(name, len); + len += len; + } + rb_str_resize(name, strlen(RSTRING_PTR(name))); + return name; } #else #ifdef HAVE_UNAME |