getpid man page on DigitalUNIX

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getpid(2)							     getpid(2)

       getpid,	getpgrp,  getppid  -  Get the process ID, process group ID, or
       parent process ID

       #include <unistd.h>

       pid_t getpid
	       void ); pid_t getpgrp
	       void ); pid_t getppid
	       void );

       Application developers might 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
       might be required on other vendors' systems that conform to these stan‐

       Interfaces  documented on this reference page conform to industry stan‐
       dards as follows:

       getpid(), getpgrp(), getppid():	POSIX.1, XSH4.0, XSH4.2, XSH5.0

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

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

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

       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.

       Functions: fork(2), kill(2), setpgid(2), setsid(2), wait(2)

       Commands: init(8)

       Standards: standards(5)


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