GETSID(2) BSD System Calls Manual GETSID(2)NAMEgetsid — get session ID
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
pid_t
getsid(pid_t pid);
DESCRIPTION
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.
ERRORS
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 speci‐
fied by pid.
SEE ALSOgetpgid(2), setsid(2), termios(4)STANDARDS
The getsid() function conforms to X/Open Portability Guide Issue 4,
Version 2 (“XPG4.2”).
BSD April 4, 2011 BSD