GETSID(2) |
System Calls Manual |
GETSID(2) |
Standard C Library (libc, -lc)
#include <unistd.h>
pid_t
getsid
(pid_t
pid);
The getsid
() function returns the session ID of the
process specified by pid. If pid
is 0, the session ID of the calling process is returned. The session ID is
defined as the process group ID of the process that is the session leader.
If an error occurs, getsid
() returns -1 and the global
variable errno is set to indicate the error, as follows:
- [
ESRCH
]
- No process can be found corresponding to that specified by
pid.
The getsid
() function conforms to
X/Open Portability Guide Issue 4, Version 2
(“XPG4.2”).