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TCSETPGRP(3) FreeBSD Library Functions Manual TCSETPGRP(3)
NAME
tcsetpgrp - set foreground process group ID
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
int
tcsetpgrp(int fd, pid_t pgrp_id);
DESCRIPTION
If the process has a controlling terminal, the tcsetpgrp() function sets
the foreground process group ID associated with the terminal device to
pgrp_id. The terminal device associated with fd must be the controlling
terminal of the calling process and the controlling terminal must be
currently associated with the session of the calling process. The value
of pgrp_id must be the same as the process group ID of a process in the
same session as the calling process.
RETURN VALUES
The tcsetpgrp() function returns the value 0 if successful; otherwise the
value -1 is returned and the global variable errno is set to indicate the
error.
ERRORS
The tcsetpgrp() function will fail if:
[EBADF] The fd argument is not a valid file descriptor.
[EINVAL] An invalid value of pgrp_id was specified.
[ENOTTY] The calling process does not have a controlling
terminal, or the file represented by fd is not the
controlling terminal, or the controlling terminal is
no longer associated with the session of the calling
process.
[EPERM] The pgrp_id argument does not match the process group
ID of a process in the same session as the calling
process.
SEE ALSO
setpgid(2), setsid(2), tcgetpgrp(3)
STANDARDS
The tcsetpgrp() function is expected to be compliant with the IEEE Std
1003.1-1988 ("POSIX.1") specification.
FreeBSD 14.0-RELEASE-p11 November 28, 2022 FreeBSD 14.0-RELEASE-p11