getsid
Synopsis
#include <unistd.h>
pid_t getsid(pid_t pid);
Status
Partially implemented
Conformance
IEEE Std 1003.1-2017
Description
The getsid() function shall obtain 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 value
Upon successful completion, getsid() shall return the process group ID of the session leader of the specified process.
Otherwise, it shall return -1 and set errno to indicate the error.
Errors
The getsid() function shall 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.
Tests
Untested
Known bugs
None