SETSID.2
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上传日期:2007-02-01
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操作系统开发
开发平台:
C/C++
- .TH SETSID 2
- .SH NAME
- setsid, getpgrp - create process group, get process group id
- .SH SYNOPSIS
- .ft B
- .nf
- #include <sys/types.h>
- #include <unistd.h>
- pid_t setsid(void)
- pid_t getpgrp(void)
- .fi
- .ft P
- .SH DESCRIPTION
- .B Setsid()
- creates a new session if the calling process is not already a session
- leader. The calling process becomes the session leader of a new process
- group and the process group ID of this new process group will be equal to
- the process ID of the new session leader. The process group ID is inherited
- on a
- .BR fork() .
- .PP
- .B Getpgrp()
- returns the process group ID of the calling process.
- .SH "SEE ALSO"
- .BR kill (2),
- .BR termios (3),
- .BR tty (4).
- .SH DIAGNOSTICS
- .B Setsid()
- returns the new process group ID on success, or -1 with
- .B errno
- set to
- .B EPERM
- if the process is already a session leader.
- .SH AUTHOR
- Kees J. Bot (kjb@cs.vu.nl)