1 /* hostname.c - Get/Set the hostname 2 * 3 * Copyright 2012 Andre Renaud <andre (at) bluewatersys.com> 4 * 5 * http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/hostname.html 6 7 USE_HOSTNAME(NEWTOY(hostname, "bF:", TOYFLAG_BIN)) 8 9 config HOSTNAME 10 bool "hostname" 11 default y 12 help 13 usage: hostname [-b] [-F FILENAME] [newname] 14 15 Get/Set the current hostname 16 17 -b Set hostname to 'localhost' if otherwise unset 18 -F Set hostname to contents of FILENAME 19 */ 20 21 #define FOR_hostname 22 #include "toys.h" 23 24 GLOBALS( 25 char *fname; 26 ) 27 28 void hostname_main(void) 29 { 30 char *hostname = *toys.optargs; 31 32 if (TT.fname && (hostname = xreadfile(TT.fname, 0, 0))) { 33 if (!*chomp(hostname)) { 34 if (CFG_TOYBOX_FREE) free(hostname); 35 if (!(toys.optflags&FLAG_b)) error_exit("empty '%s'", TT.fname); 36 hostname = 0; 37 } 38 } 39 40 if (!hostname && (toys.optflags&FLAG_b)) 41 if (gethostname(toybuf, sizeof(toybuf)-1) || !*toybuf) 42 hostname = "localhost"; 43 44 if (hostname) { 45 if (sethostname(hostname, strlen(hostname))) 46 perror_exit("set '%s'", hostname); 47 } else { 48 if (gethostname(toybuf, sizeof(toybuf)-1)) perror_exit("gethostname"); 49 xputs(toybuf); 50 } 51 } 52
