Axel Dörfler
1beeb96080
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20008 a95241bf-73f2-0310-859d-f6bbb57e9c96
91 lines
1.2 KiB
C
91 lines
1.2 KiB
C
/*
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* Copyright 2002-2007, Axel Dörfler, [email protected]. All rights reserved.
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* Distributed under the terms of the MIT License.
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*/
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#include <syscalls.h>
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#include <syscall_process_info.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#define RETURN_AND_SET_ERRNO(err) \
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if (err < 0) { \
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errno = err; \
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return -1; \
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} \
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return err;
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extern thread_id __main_thread_id;
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pid_t
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getpgrp(void)
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{
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return getpgid(__main_thread_id);
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}
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pid_t
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getpid(void)
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{
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// this one returns the ID of the main thread
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return __main_thread_id;
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}
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pid_t
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getppid(void)
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{
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return _kern_process_info(0, PARENT_ID);
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// this is not supposed to return an error value
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}
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pid_t
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getsid(pid_t process)
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{
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pid_t session = _kern_process_info(process, SESSION_ID);
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RETURN_AND_SET_ERRNO(session);
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}
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pid_t
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getpgid(pid_t process)
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{
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pid_t group = _kern_process_info(process, GROUP_ID);
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RETURN_AND_SET_ERRNO(group);
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}
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int
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setpgid(pid_t process, pid_t group)
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{
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status_t status = _kern_setpgid(process, group);
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RETURN_AND_SET_ERRNO(status);
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}
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pid_t
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setpgrp(void)
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{
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return setpgid(0, 0);
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}
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pid_t
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setsid(void)
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{
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status_t status = _kern_setsid();
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RETURN_AND_SET_ERRNO(status);
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}
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