01-20-2010
From the man page of strcat (emphasis added)
Quote:
The strcat() function appends the src string to the dest string, overwriting the null byte ('\0') at the end of dest, and then adds a terminating null byte. The strings may not overlap, and the dest string must have enough space for the result.[...]
If src contains n or more characters, strcat() writes n+1 characters to dest (n from src plus the terminating null byte). Therefore, the size of dest must be at least strlen(dest)+n+1.
So as soon as you read more that 512 bytes from the process (which, with netstat will happen almost guaranteed) you'll start trying to write into unreserved space. This space might already be claimed by another process, and so the system intervenes.
One approach might be to allocate a large enough part of memory at the beginning.
A better approach would be to allocate a bit of memory using malloc(), and expanding that if needed using realloc().
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KILL(1) General Commands Manual KILL(1)
NAME
kill, broke - print commands to kill processes
SYNOPSIS
kill name
broke
DESCRIPTION
Kill prints commands that will cause all processes called name and owned by the current user to be terminated. Use the send command of
81/2(1), or pipe the output of kill into rc(1) to execute the commands.
Kill suggests sending a kill note to the process; the same message delivered to the process's ctl file (see proc(3)) is a surer, if heavy
handed, kill, but is necessary if the offending process is ignoring notes.
Broke prints commands that will cause all processes in the Broken state and owned by the current user to go away. When a process dies
because of an error caught by the system, it may linger in the Broken state to allow examination with a debugger. Executing the commands
printed by broke lets the system reclaim the resources used by the broken processes.
SOURCE
/rc/bin/kill
/rc/bin/broke
SEE ALSO
ps(1), stop(1), proc(3)
KILL(1)