author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 02:01:42 +0200 | |
changeset 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
0
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/* FINGER.C |
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* |
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* Portions Copyright (c) 1993-2004 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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*/ |
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|
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/* |
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* Copyright (c) 1989, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* This code is derived from software contributed to Berkeley by |
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* Tony Nardo of the Johns Hopkins University/Applied Physics Lab. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* This product includes software developed by the University of |
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* California, Berkeley and its contributors. |
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* 4. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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|
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <libc/netinet/in.h> |
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#include <libc/arpa/inet.h> |
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#include <netdb.h> |
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#include <unistd.h> |
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#include <stdio.h> |
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#include <ctype.h> |
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#include <string.h> |
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#include <stdlib.h> |
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|
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int main (int argc, char* argv[]) |
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{ |
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int c, lastc; |
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struct in_addr defaddr; |
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struct hostent *hp, def; |
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struct sockaddr_in sin; |
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int s, i; |
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char *alist[1], *host; |
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char request[100]; |
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char input[80]; |
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char* name; |
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|
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if (argc >= 2) |
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{ |
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name = argv[1]; |
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} |
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else |
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{ |
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printf("user@hostname? "); |
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fflush(stdout); |
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name = input; |
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do |
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{ |
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c = getchar(); |
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if (c=='\b') /* DIY backspace processing */ |
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{ |
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if (name > input) |
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name--; |
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continue; |
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} |
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if (c=='\n' || c=='\r') |
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break; |
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*name++ = c; |
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} |
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while (name < input+78); |
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*name++ = '\0'; |
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name = input; |
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} |
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host = strrchr(name, '@'); |
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if (host==0) |
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{ |
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printf("Usage: finger user@hostname\n"); |
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exit(-2); |
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} |
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*host++ = NULL; |
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99 |
|
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/* Step 1 - resolve the IP address */ |
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|
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printf("\nLooking up IP address of %s...\n", host); |
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|
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if (isdigit(*host) && (defaddr.s_addr = inet_addr(host)) != INADDR_ANY) |
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diff
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|
105 |
{ |
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Revision: 201002
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parents:
diff
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|
106 |
def.h_name = host; |
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Revision: 201002
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parents:
diff
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|
107 |
def.h_addr_list = alist; |
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Revision: 201002
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parents:
diff
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|
108 |
def.h_addr = (char *)&defaddr; |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
109 |
def.h_length = sizeof(struct in_addr); |
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parents:
diff
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|
110 |
def.h_addrtype = AF_INET; |
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parents:
diff
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|
111 |
def.h_aliases = 0; |
e4d67989cc36
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parents:
diff
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|
112 |
hp = &def; |
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diff
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|
113 |
} |
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|
114 |
else |
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diff
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|
115 |
{ |
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Revision: 201002
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diff
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|
116 |
hp = gethostbyname(host); |
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Revision: 201002
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diff
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|
117 |
if(!hp) |
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|
118 |
{ |
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Revision: 201002
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|
119 |
(void)fprintf(stderr, "finger: unknown host: %s\n", host); |
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|
120 |
exit(-3); |
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|
121 |
} |
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|
122 |
} |
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|
123 |
sin.sin_family = hp->h_addrtype; |
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Revision: 201002
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diff
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|
124 |
memcpy((char *)&sin.sin_addr, hp->h_addr, hp->h_length); |
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parents:
diff
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|
125 |
if ((s = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0) { |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
126 |
perror("finger: socket"); |
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Revision: 201002
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|
127 |
exit(-4); |
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diff
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|
128 |
} |
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|
129 |
|
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|
130 |
(void)printf("\n %s => %s\n", hp->h_name, inet_ntoa(sin.sin_addr)); |
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diff
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|
131 |
|
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|
132 |
/* Step 2 - Connect to the finger port on the target host */ |
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|
133 |
|
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|
134 |
printf("\nConnecting to %s...", host); |
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Revision: 201002
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|
135 |
fflush(stdout); |
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diff
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|
136 |
|
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Revision: 201002
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diff
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|
137 |
sin.sin_port = htons(IPPORT_FINGER); |
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Revision: 201002
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parents:
diff
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|
138 |
if (connect(s, (struct sockaddr *)&sin, sizeof (sin))) { |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
139 |
perror("finger: connect"); |
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Revision: 201002
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diff
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|
140 |
exit(-5); |
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Revision: 201002
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parents:
diff
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|
141 |
} |
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diff
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|
142 |
|
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Revision: 201002
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parents:
diff
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|
143 |
printf("OK\n"); |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
144 |
|
e4d67989cc36
Revision: 201002
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parents:
diff
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|
145 |
/* Step 3 - Finger the user and read the result... */ |
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Revision: 201002
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parents:
diff
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|
146 |
|
e4d67989cc36
Revision: 201002
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parents:
diff
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|
147 |
printf("\nFinger %s@%s\n", name, host); |
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Revision: 201002
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parents:
diff
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|
148 |
|
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diff
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|
149 |
/* send the name followed by <CR><LF> */ |
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diff
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|
150 |
sprintf(request, "%s\r\n", name); |
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Revision: 201002
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parents:
diff
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|
151 |
if (write(s, request, strlen(request)) < 0) { |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
152 |
perror("finger: write"); |
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Revision: 201002
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diff
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|
153 |
close(s); |
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Revision: 201002
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diff
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|
154 |
exit(-6); |
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parents:
diff
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|
155 |
} |
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diff
changeset
|
156 |
|
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Revision: 201002
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parents:
diff
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|
157 |
/* Read from the remote system; once we're connected, we assume some |
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Revision: 201002
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parents:
diff
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|
158 |
* data. If none arrives, we hang until the user interrupts. |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
159 |
* |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
160 |
* If we see a <CR> or a <CR> with the high bit set, treat it as |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
161 |
* a newline; if followed by a newline character, only output one |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
162 |
* newline. |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
163 |
* |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
164 |
* Otherwise, all high bits are stripped; if it isn't printable and |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
165 |
* it isn't a space, we can simply set the 7th bit. Every ASCII |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
166 |
* character with bit 7 set is printable. |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
167 |
*/ |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
168 |
lastc = '\n'; |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
169 |
|
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
170 |
while (recv(s, &request[0], 1, 0) > 0) { |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
171 |
c = request[0]; |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
172 |
if (c == 0x0d) { |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
173 |
if (lastc == '\r') /* ^M^M - skip dupes */ |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
174 |
continue; |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
175 |
c = '\n'; |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
176 |
lastc = '\r'; |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
177 |
} else { |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
178 |
if (!isprint(c) && !isspace(c)) { |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
179 |
c &= 0x7f; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
180 |
c |= 0x40; |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
181 |
} |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
182 |
if (lastc != '\r' || c != '\n') |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
183 |
lastc = c; |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
184 |
else { |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
185 |
lastc = '\n'; |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
186 |
continue; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
187 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
188 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
189 |
putchar(c); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
190 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
191 |
if (lastc != '\n') |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
192 |
putchar('\n'); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
193 |
close(s); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
194 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
195 |
/* Step 4 - Check the time on the remote machine as well */ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
196 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
197 |
if ((s = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0) { |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
198 |
perror("finger: socket"); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
199 |
exit(-7); |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
200 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
201 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
202 |
sin.sin_port = htons(IPPORT_DAYTIME); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
203 |
if (connect(s, (struct sockaddr *)&sin, sizeof (sin))) { |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
204 |
perror("finger: connect"); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
205 |
exit(-8); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
206 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
207 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
208 |
i = recv(s, request, sizeof(request)-1, 0); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
209 |
if (i<0) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
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{ |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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perror("finger: recv"); |
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exit(-9); |
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} |
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request[i] = '\0'; |
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|
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printf("\nThe time on %s is %s\n", host, request); |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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217 |
close(s); |
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218 |
|
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return 0; |
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220 |
} |