1*cf5a6c84SAndroid Build Coastguard Worker /* hostname.c - Get/Set the hostname
2*cf5a6c84SAndroid Build Coastguard Worker *
3*cf5a6c84SAndroid Build Coastguard Worker * Copyright 2012 Andre Renaud <[email protected]>
4*cf5a6c84SAndroid Build Coastguard Worker *
5*cf5a6c84SAndroid Build Coastguard Worker * http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/hostname.html
6*cf5a6c84SAndroid Build Coastguard Worker
7*cf5a6c84SAndroid Build Coastguard Worker USE_HOSTNAME(NEWTOY(hostname, ">1bdsfF:[!bdsf]", TOYFLAG_BIN))
8*cf5a6c84SAndroid Build Coastguard Worker USE_DNSDOMAINNAME(NEWTOY(dnsdomainname, ">0", TOYFLAG_BIN))
9*cf5a6c84SAndroid Build Coastguard Worker
10*cf5a6c84SAndroid Build Coastguard Worker config HOSTNAME
11*cf5a6c84SAndroid Build Coastguard Worker bool "hostname"
12*cf5a6c84SAndroid Build Coastguard Worker default y
13*cf5a6c84SAndroid Build Coastguard Worker help
14*cf5a6c84SAndroid Build Coastguard Worker usage: hostname [-bdsf] [-F FILENAME] [newname]
15*cf5a6c84SAndroid Build Coastguard Worker
16*cf5a6c84SAndroid Build Coastguard Worker Get/set the current hostname.
17*cf5a6c84SAndroid Build Coastguard Worker
18*cf5a6c84SAndroid Build Coastguard Worker -b Set hostname to 'localhost' if otherwise unset
19*cf5a6c84SAndroid Build Coastguard Worker -d Show DNS domain name (no host)
20*cf5a6c84SAndroid Build Coastguard Worker -f Show fully-qualified name (host+domain, FQDN)
21*cf5a6c84SAndroid Build Coastguard Worker -F Set hostname to contents of FILENAME
22*cf5a6c84SAndroid Build Coastguard Worker -s Show short host name (no domain)
23*cf5a6c84SAndroid Build Coastguard Worker
24*cf5a6c84SAndroid Build Coastguard Worker config DNSDOMAINNAME
25*cf5a6c84SAndroid Build Coastguard Worker bool "dnsdomainname"
26*cf5a6c84SAndroid Build Coastguard Worker default y
27*cf5a6c84SAndroid Build Coastguard Worker help
28*cf5a6c84SAndroid Build Coastguard Worker usage: dnsdomainname
29*cf5a6c84SAndroid Build Coastguard Worker
30*cf5a6c84SAndroid Build Coastguard Worker Show domain this system belongs to (same as hostname -d).
31*cf5a6c84SAndroid Build Coastguard Worker */
32*cf5a6c84SAndroid Build Coastguard Worker
33*cf5a6c84SAndroid Build Coastguard Worker #define FOR_hostname
34*cf5a6c84SAndroid Build Coastguard Worker #define FORCE_FLAGS
35*cf5a6c84SAndroid Build Coastguard Worker #include "toys.h"
36*cf5a6c84SAndroid Build Coastguard Worker
GLOBALS(char * F;)37*cf5a6c84SAndroid Build Coastguard Worker GLOBALS(
38*cf5a6c84SAndroid Build Coastguard Worker char *F;
39*cf5a6c84SAndroid Build Coastguard Worker )
40*cf5a6c84SAndroid Build Coastguard Worker
41*cf5a6c84SAndroid Build Coastguard Worker void hostname_main(void)
42*cf5a6c84SAndroid Build Coastguard Worker {
43*cf5a6c84SAndroid Build Coastguard Worker char *hostname = toybuf, *dot;
44*cf5a6c84SAndroid Build Coastguard Worker struct hostent *h;
45*cf5a6c84SAndroid Build Coastguard Worker
46*cf5a6c84SAndroid Build Coastguard Worker gethostname(toybuf, sizeof(toybuf)-1);
47*cf5a6c84SAndroid Build Coastguard Worker if (TT.F && (hostname = xreadfile(TT.F, 0, 0))) {
48*cf5a6c84SAndroid Build Coastguard Worker if (!*chomp(hostname)) {
49*cf5a6c84SAndroid Build Coastguard Worker if (CFG_TOYBOX_FREE) free(hostname);
50*cf5a6c84SAndroid Build Coastguard Worker if (!FLAG(b)) error_exit("empty '%s'", TT.F);
51*cf5a6c84SAndroid Build Coastguard Worker hostname = 0;
52*cf5a6c84SAndroid Build Coastguard Worker }
53*cf5a6c84SAndroid Build Coastguard Worker } else hostname = (FLAG(b) && !*toybuf) ? "localhost" : *toys.optargs;
54*cf5a6c84SAndroid Build Coastguard Worker
55*cf5a6c84SAndroid Build Coastguard Worker // Setting?
56*cf5a6c84SAndroid Build Coastguard Worker if (hostname) {
57*cf5a6c84SAndroid Build Coastguard Worker if (sethostname(hostname, strlen(hostname)))
58*cf5a6c84SAndroid Build Coastguard Worker perror_exit("set '%s'", hostname);
59*cf5a6c84SAndroid Build Coastguard Worker return;
60*cf5a6c84SAndroid Build Coastguard Worker }
61*cf5a6c84SAndroid Build Coastguard Worker
62*cf5a6c84SAndroid Build Coastguard Worker // We only do the DNS lookup for -d and -f.
63*cf5a6c84SAndroid Build Coastguard Worker if (FLAG(d) || FLAG(f)) {
64*cf5a6c84SAndroid Build Coastguard Worker if (!(h = gethostbyname(toybuf)))
65*cf5a6c84SAndroid Build Coastguard Worker error_exit("gethostbyname: %s", hstrerror(h_errno));
66*cf5a6c84SAndroid Build Coastguard Worker snprintf(toybuf, sizeof(toybuf), "%s", h->h_name);
67*cf5a6c84SAndroid Build Coastguard Worker }
68*cf5a6c84SAndroid Build Coastguard Worker dot = toybuf+strcspn(toybuf, ".");
69*cf5a6c84SAndroid Build Coastguard Worker if (FLAG(s)) *dot = 0;
70*cf5a6c84SAndroid Build Coastguard Worker xputs(FLAG(d) ? dot+1 : toybuf);
71*cf5a6c84SAndroid Build Coastguard Worker }
72*cf5a6c84SAndroid Build Coastguard Worker
dnsdomainname_main(void)73*cf5a6c84SAndroid Build Coastguard Worker void dnsdomainname_main(void)
74*cf5a6c84SAndroid Build Coastguard Worker {
75*cf5a6c84SAndroid Build Coastguard Worker toys.optflags = FLAG_d;
76*cf5a6c84SAndroid Build Coastguard Worker hostname_main();
77*cf5a6c84SAndroid Build Coastguard Worker }
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