diff options
| -rw-r--r-- | toys/lsb/hostname.c | 36 |
1 files changed, 24 insertions, 12 deletions
diff --git a/toys/lsb/hostname.c b/toys/lsb/hostname.c index 0a1f9b18..4b9347dd 100644 --- a/toys/lsb/hostname.c +++ b/toys/lsb/hostname.c @@ -4,48 +4,60 @@ * * http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/hostname.html -USE_HOSTNAME(NEWTOY(hostname, "bF:", TOYFLAG_BIN)) +USE_HOSTNAME(NEWTOY(hostname, ">1bdsfF:[!bdsf]", TOYFLAG_BIN)) config HOSTNAME bool "hostname" default y help - usage: hostname [-b] [-F FILENAME] [newname] + usage: hostname [-bsf] [-F FILENAME] [newname] - Get/Set the current hostname + Get/set the current hostname. - -b Set hostname to 'localhost' if otherwise unset - -F Set hostname to contents of FILENAME + -b set hostname to 'localhost' if otherwise unset + -d show DNS domain name (no host) + -f show fully-qualified name (host+domain, FQDN) + -F set hostname to contents of FILENAME + -s show short host name (no domain) */ #define FOR_hostname #include "toys.h" GLOBALS( - char *fname; + char *F; ) void hostname_main(void) { - char *hostname = *toys.optargs; + char *hostname = *toys.optargs, *dot; + struct hostent *h; - if (TT.fname && (hostname = xreadfile(TT.fname, 0, 0))) { + if (TT.F && (hostname = xreadfile(TT.F, 0, 0))) { if (!*chomp(hostname)) { if (CFG_TOYBOX_FREE) free(hostname); - if (!(toys.optflags&FLAG_b)) error_exit("empty '%s'", TT.fname); + if (!(toys.optflags&FLAG_b)) error_exit("empty '%s'", TT.F); hostname = 0; } } + // Implement -b. if (!hostname && (toys.optflags&FLAG_b)) if (gethostname(toybuf, sizeof(toybuf)-1) || !*toybuf) hostname = "localhost"; + // Setting? if (hostname) { if (sethostname(hostname, strlen(hostname))) perror_exit("set '%s'", hostname); - } else { - if (gethostname(toybuf, sizeof(toybuf)-1)) perror_exit("gethostname"); - xputs(toybuf); + return; } + + // Get the hostname. + if (gethostname(toybuf, sizeof(toybuf)-1)) perror_exit("gethostname"); + if (!(h = gethostbyname(toybuf))) perror_exit("gethostbyname"); + snprintf(toybuf, sizeof(toybuf), "%s", h->h_name); + dot = strchr(toybuf, '.'); + if (toys.optflags&FLAG_s) *dot = '\0'; + xputs(toys.optflags&FLAG_d ? dot+1 : toybuf); } |