HP-UX Reference (11i v2 04/09) - 2 System Calls (vol 5)

getsid(2) getsid(2)

NAME

getsid() - get session ID

SYNOPSIS

#include <sys/types.h>

pid_t getsid (pid_t pid);

DESCRIPTION

The getsid() function returns the session ID of the speciﬁed process. If pid is

0, the call applies to the

current process. For this to be allowed, the current process and the referenced process must be in the

same session.

RETURN VALUE

Upon successful completion,

getsid() returns the session ID of the speciﬁed process. Otherwise, it

returns a value of −l and sets

errno to indicate the error.

ERRORS

If the

getsid() function fails, it sets errno

(see errno(2)) to one of the following values:

[EPERM] The current process and the speciﬁed process are not in the same session.

[ESRCH] No process can be found corresponding to that speciﬁed by pid.