SETSID(2) BSD System Calls Manual SETSID(2)NAME
setsid -- create session and set process group ID
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
pid_t
setsid(void);
DESCRIPTION
The setsid() system call creates a new session. The calling process is the session leader of the new session, is the process group leader of
a new process group and has no controlling terminal. The calling process is the only process in either the session or the process group.
RETURN VALUES
Upon successful completion, the setsid() system call returns the value of the process group ID of the new process group, which is the same as
the process ID of the calling process. If an error occurs, setsid() returns -1 and the global variable errno is set to indicate the error.
ERRORS
The setsid() system call will fail if:
[EPERM] The calling process is already a process group leader, or the process group ID of a process other than the calling process
matches the process ID of the calling process.
SEE ALSO setpgid(2), tcgetpgrp(3), tcsetpgrp(3)STANDARDS
The setsid() system call is expected to be compliant with the ISO/IEC 9945-1:1990 (``POSIX.1'') specification.
BSD June 4, 1993 BSD
Check Out this Related Man Page
SETSID(2) BSD System Calls Manual SETSID(2)NAME
setsid -- create session and set process group ID
SYNOPSIS
#include <sys/types.h>
#include <unistd.h>
pid_t
setsid(void);
DESCRIPTION
The setsid function creates a new session. The calling process is the session leader of the new session, is the process group leader of a
new process group and has no controlling terminal. The calling process is the only process in either the session or the process group.
Upon successful completion, the setsid function returns the value of the process group ID of the new process group, which is the same as the
process ID of the calling process.
ERRORS
If an error occurs, setsid returns -1 and the global variable errno is set to indicate the error, as follows:
[EPERM] The calling process is already a process group leader, or the process group ID of a process other than the calling process
matches the process ID of the calling process.
SEE ALSO setpgid(3), tcgetpgrp(3), tcsetpgrp(3)STANDARDS
The setsid function is expected to be compliant with the IEEE Std 1003.1-1988 (``POSIX.1'') specification.
BSD June 4, 1993 BSD
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