diff options
author | Benoit Mortier <opensides@users.sourceforge.net> | 2005-11-14 00:51:44 +0000 |
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committer | Benoit Mortier <opensides@users.sourceforge.net> | 2005-11-14 00:51:44 +0000 |
commit | c68d99cee2d1b3de6a7e800440433a39a7436313 (patch) | |
tree | becb58a009fd3b7016d16a44139f13d6f7b511d7 /plugins/check_dns.c | |
parent | 7741c005fa10be018264f17e685d5bde34bc92a3 (diff) | |
download | monitoring-plugins-c68d99cee2d1b3de6a7e800440433a39a7436313.tar.gz |
start of the cleaning of the localization
git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1282 f882894a-f735-0410-b71e-b25c423dba1c
Diffstat (limited to 'plugins/check_dns.c')
-rw-r--r-- | plugins/check_dns.c | 667 |
1 files changed, 348 insertions, 319 deletions
diff --git a/plugins/check_dns.c b/plugins/check_dns.c index d6e8ca29..faa1e150 100644 --- a/plugins/check_dns.c +++ b/plugins/check_dns.c @@ -23,7 +23,7 @@ const char *progname = "check_dns"; const char *revision = "$Revision$"; -const char *copyright = "2000-2004"; +const char *copyright = "2000-2005"; const char *email = "nagiosplug-devel@lists.sourceforge.net"; #include "common.h" @@ -49,156 +49,156 @@ int expect_authority = FALSE; int main (int argc, char **argv) { - char *command_line = NULL; - char input_buffer[MAX_INPUT_BUFFER]; - char *address = NULL; - char *msg = NULL; - char *temp_buffer = NULL; - int non_authoritative = FALSE; - int result = STATE_UNKNOWN; - double elapsed_time; - long microsec; - struct timeval tv; - int multi_address; - int parse_address = FALSE; /* This flag scans for Address: but only after Name: */ - output chld_out, chld_err; - size_t i; - - setlocale (LC_ALL, ""); - bindtextdomain (PACKAGE, LOCALEDIR); - textdomain (PACKAGE); - - /* Set signal handling and alarm */ - if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR) { - usage_va(_("Cannot catch SIGALRM")); - } - - if (process_arguments (argc, argv) == ERROR) { - usage_va(_("Could not parse arguments")); - } - - /* get the command to run */ - asprintf (&command_line, "%s %s %s", NSLOOKUP_COMMAND, query_address, dns_server); - - alarm (timeout_interval); - gettimeofday (&tv, NULL); - - if (verbose) - printf ("%s\n", command_line); - - /* run the command */ - if((np_runcmd(command_line, &chld_out, &chld_err, 0)) != 0) { - msg = (char *)_("nslookup returned error status"); - result = STATE_WARNING; - } - - /* scan stdout */ - for(i = 0; i < chld_out.lines; i++) { - if (verbose) - puts(chld_out.line[i]); - - if (strstr (chld_out.line[i], ".in-addr.arpa")) { - if ((temp_buffer = strstr (chld_out.line[i], "name = "))) - address = strdup (temp_buffer + 7); - else { - msg = (char *)_("Warning plugin error"); - result = STATE_WARNING; - } - } - - /* the server is responding, we just got the host name... */ - if (strstr (chld_out.line[i], "Name:")) - parse_address = TRUE; - else if (parse_address == TRUE && (strstr (chld_out.line[i], "Address:") || - strstr (chld_out.line[i], "Addresses:"))) { - temp_buffer = index (chld_out.line[i], ':'); - temp_buffer++; - - /* Strip leading spaces */ - for (; *temp_buffer != '\0' && *temp_buffer == ' '; temp_buffer++) - /* NOOP */; - - strip(temp_buffer); - if (temp_buffer==NULL || strlen(temp_buffer)==0) { - die (STATE_CRITICAL, - _("DNS CRITICAL - '%s' returned empty host name string\n"), - NSLOOKUP_COMMAND); - } - - if (address == NULL) - address = strdup (temp_buffer); - else - asprintf(&address, "%s,%s", address, temp_buffer); - } - - else if (strstr (chld_out.line[i], _("Non-authoritative answer:"))) { - non_authoritative = TRUE; - } - - result = error_scan (chld_out.line[i]); - if (result != STATE_OK) { - msg = strchr (chld_out.line[i], ':'); - if(msg) msg++; - break; - } - } - - /* scan stderr */ - for(i = 0; i < chld_err.lines; i++) { - if (verbose) - puts(chld_err.line[i]); - - if (error_scan (chld_err.line[i]) != STATE_OK) { - result = max_state (result, error_scan (chld_err.line[i])); - msg = strchr(input_buffer, ':'); - if(msg) msg++; - } - } - - /* If we got here, we should have an address string, - * and we can segfault if we do not */ - if (address==NULL || strlen(address)==0) - die (STATE_CRITICAL, - _("DNS CRITICAL - '%s' msg parsing exited with no address\n"), - NSLOOKUP_COMMAND); - - /* compare to expected address */ - if (result == STATE_OK && match_expected_address && strcmp(address, expected_address)) { - result = STATE_CRITICAL; - asprintf(&msg, _("expected %s but got %s"), expected_address, address); - } - - /* check if authoritative */ - if (result == STATE_OK && expect_authority && non_authoritative) { - result = STATE_CRITICAL; - asprintf(&msg, _("server %s is not authoritative for %s"), dns_server, query_address); - } - - microsec = deltime (tv); - elapsed_time = (double)microsec / 1.0e6; - - if (result == STATE_OK) { - if (strchr (address, ',') == NULL) - multi_address = FALSE; - else - multi_address = TRUE; - - printf ("DNS %s: ", _("OK")); - printf (ngettext("%.3f second response time", "%.3f seconds response time", elapsed_time), elapsed_time); - printf (_(". %s returns %s"), query_address, address); - printf ("|%s\n", fperfdata ("time", elapsed_time, "s", FALSE, 0, FALSE, 0, TRUE, 0, FALSE, 0)); - } - else if (result == STATE_WARNING) - printf (_("DNS WARNING - %s\n"), - !strcmp (msg, "") ? _(" Probably a non-existent host/domain") : msg); - else if (result == STATE_CRITICAL) - printf (_("DNS CRITICAL - %s\n"), - !strcmp (msg, "") ? _(" Probably a non-existent host/domain") : msg); - else - printf (_("DNS UNKNOW - %s\n"), - !strcmp (msg, "") ? _(" Probably a non-existent host/domain") : msg); - - return result; + char *command_line = NULL; + char input_buffer[MAX_INPUT_BUFFER]; + char *address = NULL; + char *msg = NULL; + char *temp_buffer = NULL; + int non_authoritative = FALSE; + int result = STATE_UNKNOWN; + double elapsed_time; + long microsec; + struct timeval tv; + int multi_address; + int parse_address = FALSE; /* This flag scans for Address: but only after Name: */ + output chld_out, chld_err; + size_t i; + + setlocale (LC_ALL, ""); + bindtextdomain (PACKAGE, LOCALEDIR); + textdomain (PACKAGE); + + /* Set signal handling and alarm */ + if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR) { + usage_va(_("Cannot catch SIGALRM")); + } + + if (process_arguments (argc, argv) == ERROR) { + usage_va(_("Could not parse arguments")); + } + + /* get the command to run */ + asprintf (&command_line, "%s %s %s", NSLOOKUP_COMMAND, query_address, dns_server); + + alarm (timeout_interval); + gettimeofday (&tv, NULL); + + if (verbose) + printf ("%s\n", command_line); + + /* run the command */ + if((np_runcmd(command_line, &chld_out, &chld_err, 0)) != 0) { + msg = (char *)_("nslookup returned an error status"); + result = STATE_WARNING; + } + + /* scan stdout */ + for(i = 0; i < chld_out.lines; i++) { + if (verbose) + puts(chld_out.line[i]); + + if (strstr (chld_out.line[i], ".in-addr.arpa")) { + if ((temp_buffer = strstr (chld_out.line[i], "name = "))) + address = strdup (temp_buffer + 7); + else { + msg = (char *)_("Warning plugin error"); + result = STATE_WARNING; + } + } + + /* the server is responding, we just got the host name... */ + if (strstr (chld_out.line[i], "Name:")) + parse_address = TRUE; + else if (parse_address == TRUE && (strstr (chld_out.line[i], "Address:") || + strstr (chld_out.line[i], "Addresses:"))) { + temp_buffer = index (chld_out.line[i], ':'); + temp_buffer++; + + /* Strip leading spaces */ + for (; *temp_buffer != '\0' && *temp_buffer == ' '; temp_buffer++) + /* NOOP */; + + strip(temp_buffer); + if (temp_buffer==NULL || strlen(temp_buffer)==0) { + die (STATE_CRITICAL, + _("DNS CRITICAL - '%s' returned empty host name string\n"), + NSLOOKUP_COMMAND); + } + + if (address == NULL) + address = strdup (temp_buffer); + else + asprintf(&address, "%s,%s", address, temp_buffer); + } + + else if (strstr (chld_out.line[i], _("Non-authoritative answer:"))) { + non_authoritative = TRUE; + } + + result = error_scan (chld_out.line[i]); + if (result != STATE_OK) { + msg = strchr (chld_out.line[i], ':'); + if(msg) msg++; + break; + } + } + + /* scan stderr */ + for(i = 0; i < chld_err.lines; i++) { + if (verbose) + puts(chld_err.line[i]); + + if (error_scan (chld_err.line[i]) != STATE_OK) { + result = max_state (result, error_scan (chld_err.line[i])); + msg = strchr(input_buffer, ':'); + if(msg) msg++; + } + } + + /* If we got here, we should have an address string, + * and we can segfault if we do not */ + if (address==NULL || strlen(address)==0) + die (STATE_CRITICAL, + _("DNS CRITICAL - '%s' msg parsing exited with no address\n"), + NSLOOKUP_COMMAND); + + /* compare to expected address */ + if (result == STATE_OK && match_expected_address && strcmp(address, expected_address)) { + result = STATE_CRITICAL; + asprintf(&msg, _("expected %s but got %s"), expected_address, address); + } + + /* check if authoritative */ + if (result == STATE_OK && expect_authority && non_authoritative) { + result = STATE_CRITICAL; + asprintf(&msg, _("server %s is not authoritative for %s"), dns_server, query_address); + } + + microsec = deltime (tv); + elapsed_time = (double)microsec / 1.0e6; + + if (result == STATE_OK) { + if (strchr (address, ',') == NULL) + multi_address = FALSE; + else + multi_address = TRUE; + + printf ("DNS %s: ", _("OK")); + printf (ngettext("%.3f second response time", "%.3f seconds response time", elapsed_time), elapsed_time); + printf (_(". %s returns %s"), query_address, address); + printf ("|%s\n", fperfdata ("time", elapsed_time, "s", FALSE, 0, FALSE, 0, TRUE, 0, FALSE, 0)); + } + else if (result == STATE_WARNING) + printf (_("DNS WARNING - %s\n"), + !strcmp (msg, "") ? _(" Probably a non-existent host/domain") : msg); + else if (result == STATE_CRITICAL) + printf (_("DNS CRITICAL - %s\n"), + !strcmp (msg, "") ? _(" Probably a non-existent host/domain") : msg); + else + printf (_("DNS UNKNOW - %s\n"), + !strcmp (msg, "") ? _(" Probably a non-existent host/domain") : msg); + + return result; } @@ -207,56 +207,56 @@ int error_scan (char *input_buffer) { - /* the DNS lookup timed out */ - if (strstr (input_buffer, _("Note: nslookup is deprecated and may be removed from future releases.")) || - strstr (input_buffer, _("Consider using the `dig' or `host' programs instead. Run nslookup with")) || - strstr (input_buffer, _("the `-sil[ent]' option to prevent this message from appearing."))) - return STATE_OK; - - /* DNS server is not running... */ - else if (strstr (input_buffer, "No response from server")) - die (STATE_CRITICAL, _("No response from DNS %s\n"), dns_server); - - /* Host name is valid, but server doesn't have records... */ - else if (strstr (input_buffer, "No records")) - die (STATE_CRITICAL, _("DNS %s has no records\n"), dns_server); - - /* Connection was refused */ - else if (strstr (input_buffer, "Connection refused") || - strstr (input_buffer, "Couldn't find server") || - strstr (input_buffer, "Refused") || - (strstr (input_buffer, "** server can't find") && - strstr (input_buffer, ": REFUSED"))) - die (STATE_CRITICAL, _("Connection to DNS %s was refused\n"), dns_server); - - /* Query refused (usually by an ACL in the namserver) */ - else if (strstr (input_buffer, "Query refused")) - die (STATE_CRITICAL, _("Query was refused by DNS server at %s\n"), dns_server); - - /* No information (e.g. nameserver IP has two PTR records) */ - else if (strstr (input_buffer, "No information")) - die (STATE_CRITICAL, _("No information returned by DNS server at %s\n"), dns_server); - - /* Host or domain name does not exist */ - else if (strstr (input_buffer, "Non-existent") || - strstr (input_buffer, "** server can't find") || - strstr (input_buffer,"NXDOMAIN")) - die (STATE_CRITICAL, _("Domain %s was not found by the server\n"), query_address); - - /* Network is unreachable */ - else if (strstr (input_buffer, "Network is unreachable")) - die (STATE_CRITICAL, _("Network is unreachable\n")); - - /* Internal server failure */ - else if (strstr (input_buffer, "Server failure")) - die (STATE_CRITICAL, _("DNS failure for %s\n"), dns_server); - - /* Request error or the DNS lookup timed out */ - else if (strstr (input_buffer, "Format error") || - strstr (input_buffer, "Timed out")) - return STATE_WARNING; - - return STATE_OK; + /* the DNS lookup timed out */ + if (strstr (input_buffer, _("Note: nslookup is deprecated and may be removed from future releases.")) || + strstr (input_buffer, _("Consider using the `dig' or `host' programs instead. Run nslookup with")) || + strstr (input_buffer, _("the `-sil[ent]' option to prevent this message from appearing."))) + return STATE_OK; + + /* DNS server is not running... */ + else if (strstr (input_buffer, "No response from server")) + die (STATE_CRITICAL, _("No response from DNS %s\n"), dns_server); + + /* Host name is valid, but server doesn't have records... */ + else if (strstr (input_buffer, "No records")) + die (STATE_CRITICAL, _("DNS %s has no records\n"), dns_server); + + /* Connection was refused */ + else if (strstr (input_buffer, "Connection refused") || + strstr (input_buffer, "Couldn't find server") || + strstr (input_buffer, "Refused") || + (strstr (input_buffer, "** server can't find") && + strstr (input_buffer, ": REFUSED"))) + die (STATE_CRITICAL, _("Connection to DNS %s was refused\n"), dns_server); + + /* Query refused (usually by an ACL in the namserver) */ + else if (strstr (input_buffer, "Query refused")) + die (STATE_CRITICAL, _("Query was refused by DNS server at %s\n"), dns_server); + + /* No information (e.g. nameserver IP has two PTR records) */ + else if (strstr (input_buffer, "No information")) + die (STATE_CRITICAL, _("No information returned by DNS server at %s\n"), dns_server); + + /* Host or domain name does not exist */ + else if (strstr (input_buffer, "Non-existent") || + strstr (input_buffer, "** server can't find") || + strstr (input_buffer,"NXDOMAIN")) + die (STATE_CRITICAL, _("Domain %s was not found by the server\n"), query_address); + + /* Network is unreachable */ + else if (strstr (input_buffer, "Network is unreachable")) + die (STATE_CRITICAL, _("Network is unreachable\n")); + + /* Internal server failure */ + else if (strstr (input_buffer, "Server failure")) + die (STATE_CRITICAL, _("DNS failure for %s\n"), dns_server); + + /* Request error or the DNS lookup timed out */ + else if (strstr (input_buffer, "Format error") || + strstr (input_buffer, "Timed out")) + return STATE_WARNING; + + return STATE_OK; } @@ -265,148 +265,177 @@ error_scan (char *input_buffer) int process_arguments (int argc, char **argv) { - int c; - - int opt_index = 0; - static struct option long_opts[] = { - {"help", no_argument, 0, 'h'}, - {"version", no_argument, 0, 'V'}, - {"verbose", no_argument, 0, 'v'}, - {"timeout", required_argument, 0, 't'}, - {"hostname", required_argument, 0, 'H'}, - {"server", required_argument, 0, 's'}, - {"reverse-server", required_argument, 0, 'r'}, - {"expected-address", required_argument, 0, 'a'}, - {"expect-authority", no_argument, 0, 'A'}, - {0, 0, 0, 0} - }; - - if (argc < 2) - return ERROR; - - for (c = 1; c < argc; c++) - if (strcmp ("-to", argv[c]) == 0) - strcpy (argv[c], "-t"); - - while (1) { - c = getopt_long (argc, argv, "hVvAt:H:s:r:a:", long_opts, &opt_index); - - if (c == -1 || c == EOF) - break; - - switch (c) { - case 'h': /* help */ - print_help (); - exit (STATE_OK); - case 'V': /* version */ - print_revision (progname, revision); - exit (STATE_OK); - case 'v': /* version */ - verbose = TRUE; - break; - case 't': /* timeout period */ - timeout_interval = atoi (optarg); - break; - case 'H': /* hostname */ - if (strlen (optarg) >= ADDRESS_LENGTH) - die (STATE_UNKNOWN, _("Input buffer overflow\n")); - strcpy (query_address, optarg); - break; - case 's': /* server name */ - /* TODO: this host_or_die check is probably unnecessary. - * Better to confirm nslookup response matches */ - host_or_die(optarg); - if (strlen (optarg) >= ADDRESS_LENGTH) - die (STATE_UNKNOWN, _("Input buffer overflow\n")); - strcpy (dns_server, optarg); - break; - case 'r': /* reverse server name */ - /* TODO: Is this host_or_die necessary? */ - host_or_die(optarg); - if (strlen (optarg) >= ADDRESS_LENGTH) - die (STATE_UNKNOWN, _("Input buffer overflow\n")); - strcpy (ptr_server, optarg); - break; - case 'a': /* expected address */ - if (strlen (optarg) >= ADDRESS_LENGTH) - die (STATE_UNKNOWN, _("Input buffer overflow\n")); - strcpy (expected_address, optarg); - match_expected_address = TRUE; - break; - case 'A': /* expect authority */ - expect_authority = TRUE; - break; - default: /* args not parsable */ - usage_va(_("Unknown argument - %s"), optarg); - } - } - - c = optind; - if (strlen(query_address)==0 && c<argc) { - if (strlen(argv[c])>=ADDRESS_LENGTH) - die (STATE_UNKNOWN, _("Input buffer overflow\n")); - strcpy (query_address, argv[c++]); - } - - if (strlen(dns_server)==0 && c<argc) { - /* TODO: See -s option */ - host_or_die(argv[c]); - if (strlen(argv[c]) >= ADDRESS_LENGTH) - die (STATE_UNKNOWN, _("Input buffer overflow\n")); - strcpy (dns_server, argv[c++]); - } - - return validate_arguments (); + int c; + + int opt_index = 0; + static struct option long_opts[] = { + {"help", no_argument, 0, 'h'}, + {"version", no_argument, 0, 'V'}, + {"verbose", no_argument, 0, 'v'}, + {"timeout", required_argument, 0, 't'}, + {"hostname", required_argument, 0, 'H'}, + {"server", required_argument, 0, 's'}, + {"reverse-server", required_argument, 0, 'r'}, + {"expected-address", required_argument, 0, 'a'}, + {"expect-authority", no_argument, 0, 'A'}, + {0, 0, 0, 0} + }; + + if (argc < 2) + return ERROR; + + for (c = 1; c < argc; c++) + if (strcmp ("-to", argv[c]) == 0) + strcpy (argv[c], "-t"); + + while (1) { + c = getopt_long (argc, argv, "hVvAt:H:s:r:a:", long_opts, &opt_index); + + if (c == -1 || c == EOF) + break; + + switch (c) { + case 'h': /* help */ + print_help (); + exit (STATE_OK); + case 'V': /* version */ + print_revision (progname, revision); + exit (STATE_OK); + case 'v': /* version */ + verbose = TRUE; + break; + case 't': /* timeout period */ + timeout_interval = atoi (optarg); + break; + case 'H': /* hostname */ + if (strlen (optarg) >= ADDRESS_LENGTH) + die (STATE_UNKNOWN, _("Input buffer overflow\n")); + strcpy (query_address, optarg); + break; + case 's': /* server name */ + /* TODO: this host_or_die check is probably unnecessary. + * Better to confirm nslookup response matches */ + host_or_die(optarg); + if (strlen (optarg) >= ADDRESS_LENGTH) + die (STATE_UNKNOWN, _("Input buffer overflow\n")); + strcpy (dns_server, optarg); + break; + case 'r': /* reverse server name */ + /* TODO: Is this host_or_die necessary? */ + host_or_die(optarg); + if (strlen (optarg) >= ADDRESS_LENGTH) + die (STATE_UNKNOWN, _("Input buffer overflow\n")); + strcpy (ptr_server, optarg); + break; + case 'a': /* expected address */ + if (strlen (optarg) >= ADDRESS_LENGTH) + die (STATE_UNKNOWN, _("Input buffer overflow\n")); + strcpy (expected_address, optarg); + match_expected_address = TRUE; + break; + case 'A': /* expect authority */ + expect_authority = TRUE; + break; + default: /* args not parsable */ + usage_va(_("Unknown argument - %s"), optarg); + } + } + + c = optind; + if (strlen(query_address)==0 && c<argc) { + if (strlen(argv[c])>=ADDRESS_LENGTH) + die (STATE_UNKNOWN, _("Input buffer overflow\n")); + strcpy (query_address, argv[c++]); + } + + if (strlen(dns_server)==0 && c<argc) { + /* TODO: See -s option */ + host_or_die(argv[c]); + if (strlen(argv[c]) >= ADDRESS_LENGTH) + die (STATE_UNKNOWN, _("Input buffer overflow\n")); + strcpy (dns_server, argv[c++]); + } + + return validate_arguments (); } int validate_arguments () { - if (query_address[0] == 0) - return ERROR; + if (query_address[0] == 0) + return ERROR; - return OK; + return OK; } void print_help (void) { - print_revision (progname, revision); + print_revision (progname, revision); - printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n"); - printf (COPYRIGHT, copyright, email); + printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n"); + printf (COPYRIGHT, copyright, email); - printf (_("\ -This plugin uses the nslookup program to obtain the IP address\n\ -for the given host/domain query. A optional DNS server to use may\n\ -be specified. If no DNS server is specified, the default server(s)\n\ -specified in /etc/resolv.conf will be used.\n\n")); + printf (_("This plugin uses the nslookup program to obtain the IP address for the given host/domain query.")); + + printf ("\n"); + + printf (_("An optional DNS server to use may be specified.")); + + printf ("\n"); - print_usage (); + printf (_("If no DNS server is specified, the default server(s)specified in /etc/resolv.conf will be used.")); - printf (_(UT_HELP_VRSN)); + printf ("\n\n"); - printf (_("\ --H, --hostname=HOST\n\ - The name or address you want to query\n\ --s, --server=HOST\n\ - Optional DNS server you want to use for the lookup\n\ --a, --expected-address=IP-ADDRESS\n\ - Optional IP address you expect the DNS server to return\n\ --A, --expect-authority\n\ - Optionally expect the DNS server to be authoritative for the lookup\n")); + print_usage (); - printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT); + printf (_(UT_HELP_VRSN)); - printf (_(UT_SUPPORT)); + printf (" -H, --hostname=HOST"); + + printf ("\n"); + + printf (_("the name or address you want to query")); + + printf ("\n"); + + printf (" -s, --server=HOST"); + + printf ("\n"); + + printf (_("optional DNS server you want to use for the lookup")); + + printf ("\n"); + + printf (" -a, --expected-address=IP-ADDRESS"); + + printf ("\n"); + + printf (_("optional IP address you expect the DNS server to return")); + + printf ("\n"); + + printf (" -A, --expect-authority"); + + printf ("\n"); + + printf (_("optionally expect the DNS server to be authoritative for the lookup")); + + printf ("\n"); + + printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT); + + printf (_(UT_SUPPORT)); } void print_usage (void) { - printf ("\ -Usage: %s -H host [-s server] [-a expected-address] [-A] [-t timeout]\n", progname); + printf (_("Usage:")); + + printf ("%s -H host [-s server] [-a expected-address] [-A] [-t timeout]\n", progname); } |