getpid(2) [osf1 man page]

getpid(2)							System Calls Manual							 getpid(2)

NAME

       getpid, getpgrp, getppid - Gets the process ID, process group ID, parent process ID

SYNOPSIS

       #include <unistd.h>

       pid_t getpid( void );

       pid_t getpgrp( void );

       pid_t getppid( void );

       Application  developers	may  want  to  specify an #include statement for <sys/types.h> before the one for <unistd.h> if programs are being
       developed for multiple platforms. The additional #include statement is not required on Tru64 UNIX systems or by ISO  or	X/Open	standards,
       but may be required on other vendors' systems that conform to these standards.

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       getpid(), getpgrp(), getppid():	POSIX.1, XPG4, XPG4-UNIX

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

DESCRIPTION

       The getpid() function returns the process ID of the calling process.

       The getpgrp() function returns the process group ID of the calling process.

       The  getppid()  function  returns  the  parent  process ID of the calling process.  When a process is created, its parent process ID is the
       process ID of its parent process.  If a parent process exits, the parent process IDs of its child processes are changed to the  process	ID
       of the init program.

RELATED INFORMATION

       System calls: fork(2), kill(2), setpgid(2), setsid(2), wait(2)

       Standards: standards(5) delim off

																	 getpid(2)

getpid(2)							   System Calls 							 getpid(2)

NAME

       getpid, getpgrp, getppid, getpgid - get process, process group, and parent process IDs

SYNOPSIS

       #include <unistd.h>

       pid_t getpid(void);

       pid_t getpgrp(void);

       pid_t getppid(void);

       pid_t getpgid(pid_t pid);

DESCRIPTION

       The getpid() function returns the process ID of the calling process.

       The getpgrp() function returns the process group ID of the calling process.

       The getppid() function returns the parent process ID of the calling process.

       The getpgid() function returns the process group ID of the process whose process ID is equal to pid, or the process group ID of the calling
       process, if pid is equal to 0.

RETURN VALUES

       The getpid(), getpgrp(), and getppid() functions are always successful and no return value is reserved to indicate an error.

       Upon successful completion, getpgid() returns the process group ID. Otherwise, getpgid() returns (pid_t)-1 and sets errno to  indicate  the
       error.

ERRORS

       The getpgid() function will fail if:

       EPERM	The  process  whose process  ID is equal to pid is not in the same session as the calling process, and the implementation does not
		allow access to the process group ID of that process from the calling process.

       ESRCH	There is no process with a process ID equal to pid.

       The getpgid() function may fail if:

       EINVAL	 The value of the pid argument is invalid.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Async-Signal-Safe 	   |
       +-----------------------------+-----------------------------+
       |Standard		     |See standards(5). 	   |
       +-----------------------------+-----------------------------+

SEE ALSO

       Intro(2), exec(2), fork(2), getsid(2), setpgid(2), setpgrp(2), setsid(2), signal(3C), attributes(5), standards(5)

SunOS 5.11							    27 Jan 2009 							 getpid(2)