02-15-2006
Yes, that was not correct - exec doesn't necessarily close file descriptors.
However I still don't understand what the OP is trying to achieve.
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LEARN ABOUT OPENSOLARIS
getsid
getsid(2) System Calls getsid(2)
NAME
getsid - get process group ID of session leader
SYNOPSIS
#include <unistd.h>
pid_t getsid(pid_t pid);
DESCRIPTION
The getsid() function obtains the process group ID of the process that is the session leader of the process specified by pid. If pid is
(pid_t)0, it specifies the calling process.
RETURN VALUES
Upon successful completion, getsid() returns the process group ID of the session leader of the specified process. Otherwise, it returns
(pid_t)-1 and sets errno to indicate the error.
ERRORS
The getsid() function will fail if:
EPERM The process specified by pid is not in the same session as the calling process, and the implementation does not allow access to
the process group ID of the session leader of that process from the calling process.
ESRCH There is no process with a process ID equal to pid.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO
exec(2), fork(2), getpid(2), getpgid(2), setpgid(2), setsid(2), attributes(5), standards(5)
SunOS 5.11 22 Jan 1996 getsid(2)