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Full Discussion: Memory Fault (core dumped) in ttpy program
Top Forums Programming Memory Fault (core dumped) in ttpy program Post 302464710 by jim mcnamara on Wednesday 20th of October 2010 07:54:17 PM
Old 10-20-2010
I don't want to correct everything....

main is NOT void, it is int. Return to int from main(). Always.

Turn on warnings and every other diagnostic known to the compiler.

Strings in C cannot be less than two characters, if they contain dat. a[1] will not fly generally. Why? they need a terminating nul characters \0 == ascii 0

you do not have all of the #include files required to compile the code.
Read the man page for read & open - it tells you at the top the name of the include file(s)required.

You cannot call a compile ok until:
1. there are zero warnings
2. there are zero errors

Period. Anything else that seems to work is a disaster waiting to happen.
 

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LEARN ABOUT SUNOS

in.echod

in.echod(1M)						  System Administration Commands					      in.echod(1M)

NAME

       in.echod - UDP or TCP echo protocol service daemon

SYNOPSIS

       in.echod

       FMRI
       svc:/internet/echo:default

DESCRIPTION

       FMRI  stands  for  Fault  Management  Resource  Identifier.  It is used to identify resources managed by the Fault Manager. See fmd(1M) and
       smf(5).

       The in.echod service provides the server-side of the echo protocol. This protocol is used for debugging and bandwidth  measurement  and	is
       available on both TCP and UDP transports, through port 7.

       The in.echod service is an inetd(1M) smf(5) delegated service. The in.echod detects which transport is requested by examining the socket it
       is passed by the inetd daemon.

       TCP-based service

	   Once a connection is established, the in.echod echoes any data received from the client back to the	client.  The  server  echoes  data
	   until the client program terminates the connection.

       UDP-based service

	   The	in.echod listens for UDP datagrams. When a datagram is received, the server creates a UDP datagram containing the data it received
	   and sends it to the client.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNW			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       inetd(1M), attributes(5), smf(5)

       RFC 862

SunOS 5.10							    23 Aug 2004 						      in.echod(1M)
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