setup(2) [debian man page]

SETUP(2)						     Linux Programmer's Manual							  SETUP(2)

NAME

       setup - setup devices and file systems, mount root file system

SYNOPSIS

       #include <unistd.h>

       int setup(void);

DESCRIPTION

       setup()	is  called once from within linux/init/main.c.	It calls initialization functions for devices and file systems configured into the
       kernel and then mounts the root file system.

       No user process may call setup().  Any user process, even a process with superuser permission, will receive EPERM.

RETURN VALUE

       setup() always returns -1 for a user process.

ERRORS

       EPERM  Always, for a user process.

VERSIONS

       Since Linux 2.1.121, no such function exists anymore.

CONFORMING TO

       This function is Linux-specific, and should not be used in programs intended to be portable, or indeed in any programs at all.

NOTES

       The calling sequence varied: at some times setup () has had a single argument void *BIOS and at other times a single argument int magic.

COLOPHON

       This page is part of release 3.44 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2008-12-03								  SETUP(2)

GETTID(2)						     Linux Programmer's Manual							 GETTID(2)

NAME

       gettid - get thread identification

SYNOPSIS

       #include <sys/types.h>

       pid_t gettid(void);

DESCRIPTION

       gettid() returns the caller's thread ID (TID).  In a single-threaded process, the thread ID is equal to the process ID (PID, as returned by
       getpid(2)).  In a multithreaded process, all threads have the same PID, but each one has a unique TID.  For further details, see  the  dis-
       cussion of CLONE_THREAD in clone(2).

RETURN VALUE

       On success, returns the thread ID of the calling process.

ERRORS

       This call is always successful.

VERSIONS

       The gettid() system call first appeared on Linux in kernel 2.4.11.

CONFORMING TO

       gettid() is Linux-specific and should not be used in programs that are intended to be portable.

NOTES

       Glibc does not provide a wrapper for this system call; call it using syscall(2).

       The thread ID returned by this call is not the same thing as a POSIX thread ID (i.e., the opaque value returned by pthread_self(3)).

SEE ALSO

       clone(2), fork(2), getpid(2)

COLOPHON

       This  page is part of release 3.25 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2008-04-14								 GETTID(2)