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Full Discussion: process tree
Top Forums Shell Programming and Scripting process tree Post 302348698 by annapurna konga on Saturday 29th of August 2009 07:58:32 AM
Old 08-29-2009
process tree

how to draw a process tree if i know my process id
and how can i identify session leaders

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SETSID(2)						      BSD System Calls Manual							 SETSID(2)

setsid -- create session and set process group ID SYNOPSIS
#include <sys/types.h> #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
setpgid(3), tcgetpgrp(3), tcsetpgrp(3) STANDARDS
The setsid function is expected to be compliant with the IEEE Std 1003.1-1988 (``POSIX.1'') specification. BSD
June 4, 1993 BSD

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