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| author | Michael Tokarev | 2013-12-17 19:13:45 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2013-12-17 19:13:45 +0100 |
| commit | e9355c43263efd8f9b31b83c4e2aeba4a82de75e (patch) | |
| tree | 7d111167cd5060ddbcaae9383107927d9af54340 /networking | |
| parent | 4967a41ba1d17090e764952975c651b22fd183d1 (diff) | |
| download | busybox-e9355c43263efd8f9b31b83c4e2aeba4a82de75e.zip busybox-e9355c43263efd8f9b31b83c4e2aeba4a82de75e.tar.gz | |
hostname: do not use gethostbyname() for "hostname -s"
There's no reason to call gethostbyname() on the value returned
by uname() when asked just for a short name of a host. This may
also be wrong, when uname is set to one value, but in /etc/hosts
(or elsewhere) the "canonical" name is different. This is often
the case for localhost entry in /etc/hosts:
127.0.0.1 localhost myname
With this content of /etc/hosts, and uname being set to myname,
busybox hostname -s will return localhost, while regular
hostname utility returns myname.
Fix this by not calling gethostbyname() for the simple
'hostname -s' use.
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/hostname.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/networking/hostname.c b/networking/hostname.c index d2516b5..b3e3522 100644 --- a/networking/hostname.c +++ b/networking/hostname.c @@ -106,7 +106,7 @@ int hostname_main(int argc UNUSED_PARAM, char **argv) OPT_i = 0x4, OPT_s = 0x8, OPT_F = 0x10, - OPT_dfis = 0xf, + OPT_dfi = 0x7, }; unsigned opts; @@ -134,7 +134,7 @@ int hostname_main(int argc UNUSED_PARAM, char **argv) if (applet_name[0] == 'd') /* dnsdomainname? */ opts = OPT_d; - if (opts & OPT_dfis) { + if (opts & OPT_dfi) { /* Cases when we need full hostname (or its part) */ struct hostent *hp; char *p; @@ -159,6 +159,9 @@ int hostname_main(int argc UNUSED_PARAM, char **argv) bb_putchar('\n'); } } + } else if (opts & OPT_s) { + strchrnul(buf, '.')[0] = '\0'; + puts(buf); } else if (opts & OPT_F) { /* Set the hostname */ do_sethostname(hostname_str, 1); |