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(7) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Standard |
+--------------------+-----------------+

SEE ALSO

exec(2), fork(2), getpgid(2), getpid(2), setpgid(2), setsid(2),
attributes(7), standards(7)

January 22, 1996 GETSID(2)