07-23-2009
Thought: I believe that "orphaned" processes (parent exits without collecting their return status) are picked up by init. It looks like init keeps a record of the processes that it inherits, and their eventual exit status.
If this is what "who -d" is displaying, then the processes have already gone. I have some on my AIX systems as well, so they are probably normal.
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LEARN ABOUT NETBSD
setsid
SETSID(2) BSD System Calls Manual SETSID(2)
NAME
setsid -- create session and set process group ID
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
pid_t
setsid(void);
DESCRIPTION
The setsid() function creates a new session. The calling process is the session leader of the new session, is the process group leader of a
new process group and has no controlling terminal. The calling process is the only process in either the session or the process group.
Upon successful completion, the setsid() function returns the value of the process group ID of the new process group, which is the same as
the process ID of the calling process.
ERRORS
If an error occurs, setsid() returns -1 and the global variable errno is set to indicate the error, as follows:
[EPERM] The calling process is already a process group leader, or the process group ID of a process other than the calling process
matches the process ID of the calling process.
SEE ALSO
getsid(2), setpgid(2), tcgetpgrp(3), tcsetpgrp(3)
STANDARDS
The setsid() function conforms to ISO/IEC 9945-1:1990 (``POSIX.1'').
BSD
April 4, 2011 BSD