diff options
Diffstat (limited to 'misc-utils/hostname.c.orig')
| -rw-r--r-- | misc-utils/hostname.c.orig | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/misc-utils/hostname.c.orig b/misc-utils/hostname.c.orig new file mode 100644 index 000000000..b7e61d1f7 --- /dev/null +++ b/misc-utils/hostname.c.orig @@ -0,0 +1,187 @@ +/* hostname -- set the host name or show the host/domain name + + Copyright (C) 1994 Peter Tobias + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +*/ + + +#include <stdio.h> +#include <unistd.h> +#include <getopt.h> +#include <string.h> +#include <netdb.h> +#include <errno.h> +#include <sys/param.h> + +#define NO_OPT -1 + +static char *program_name; +static const char *version_string = "hostname 1.5"; + +static void sethname(char *); +static void showhname(char *, int); +static void usage(void); + +static void sethname(char *hname) +{ + if(sethostname(hname, strlen(hname))) { + switch(errno) { + case EPERM: + fprintf(stderr,"%s: you must be root to change the host name\n", program_name); + break; + case EINVAL: + fprintf(stderr,"%s: name too long\n", program_name); + break; + default: + } + exit(1); + }; +} + +static void showhname(char *hname, int c) +{ + struct hostent *hp; + register char *p; + + if (!(hp = gethostbyname(hname))) { + herror(program_name); + exit(1); + } + + if (!(p = strchr(hp->h_name, '.'))) { + fprintf(stderr,"%s: can't find a FQDN for the host name `%s'\n", program_name, hname); + exit(1); + } + + switch(c) { + case 'd': + printf("%s\n", ++p); + break; + case 'f': + printf("%s\n", hp->h_name); + break; + case 's': + *p = '\0'; + printf("%s\n", hp->h_name); + break; + default: + } +} + +static void usage(void) +{ + printf("Usage: %s [OPTION]... [hostname]\n\n\ + -d, --domain display the DNS domain name\n\ + -F, --file filename read the host name from file\n\ + -f, --fqdn, --long display the long host name (FQDN)\n\ + -s, --short display the short host name\n\ + -h, --help display this help and exit\n\ + -v, --version output version information and exit\n\ +\n\ + When the program is called without any arguments, it displays the\n\ + current host name as set by the hostname command. If an argument\n\ + is given, the program will set the value of the host name to the\n\ + value specified.\n\ + Unless you are using bind or NIS for host lookups you can change the\n\ + FQDN (Fully Qualified Domain Name) and the DNS domain name (which is\n\ + part of the FQDN) in the /etc/hosts file.\n", program_name); +} + +int main(int argc, char **argv) +{ + int c; + int option_index = 0; + + char myname[MAXHOSTNAMELEN+1]; + + static const struct option long_options[] = + { + {"domain", no_argument, 0, 'd'}, + {"file", required_argument, 0, 'F'}, + {"fqdn", no_argument, 0, 'f'}, + {"help", no_argument, 0, 'h'}, + {"long", no_argument, 0, 'f'}, + {"short", no_argument, 0, 's'}, + {"version", no_argument, 0, 'v'}, + {0, 0, 0, 0} + }; + + program_name = (rindex(argv[0], '/')) ? rindex(argv[0], '/') + 1 : argv[0]; + + if (strcmp(program_name, "dnsdomainname") == 0) { + if (argc > 1) { + fprintf(stderr,"%s: You can't change the DNS domainname with this command\n", program_name); + fprintf(stderr,"\nUnless you are using bind or NIS for host lookups you can change the DNS\n"); + fprintf(stderr,"domain name (which is part of the FQDN) in the /etc/hosts file.\n"); + exit(1); + } + c = 'd'; + } else + c = getopt_long(argc, argv, "dfF:hsv", long_options, &option_index); + + gethostname(myname, sizeof(myname)); + + switch(c) + { + case 'd': + case 'f': + case 's': + showhname(myname, c); + break; + case 'F': + { + register FILE *fd; + register char *p; + char fline[MAXHOSTNAMELEN]; + + if ((fd = fopen(optarg, "r")) != NULL) { + while (fgets(fline, sizeof(fline), fd) != NULL) + if ((p = index(fline, '\n')) != NULL) { + *p = '\0'; + if (fline[0] == '#') + continue; + sethname(fline); + } + (void) fclose(fd); + } else { + fprintf(stderr,"%s: can't open `%s'\n", + program_name, optarg); + exit(1); + } + } + break; + case 'h': + usage(); + break; + case 'v': + printf("%s\n", version_string); + break; + case '?': + fprintf(stderr,"Try `%s --help' for more information.\n", program_name); + exit(1); + break; + case NO_OPT: + if (optind < argc) { + sethname(argv[optind]); + exit(0); + } + default: + printf("%s\n", myname); + + }; + exit(0); +} |