GETSID Section: Linux Programmer's Manual (2) Updated: 11 April 2025 Index   NAME getsid - get session ID   SYNOPSIS #include <unistd.h> pid_t getsid(pid_t pid);   DESCRIPTION getsid(0) returns the session ID of the calling process. getsid(p) returns the session ID of the process with process ID p.   ERRORS On error, -1 will be returned. The only error which can happen is ESRCH, when no process with process ID p was found.   CONFORMING TO SVr4, which documents an additional EPERM error condition.   SEE ALSO   Index NAME SYNOPSIS DESCRIPTION ERRORS CONFORMING TO SEE ALSO This document was created by using the manual pages. Time: 11:56:06 GMT, March 24, 2025