TCGETPGRP(3) NetBSD Library Functions Manual TCGETPGRP(3)
tcgetpgrp -- get foreground process group ID
Standard C Library (libc, -lc)
#include <unistd.h> pid_t tcgetpgrp(int fd);
The tcgetpgrp function returns the value of the process group ID of the foreground process group associated with the terminal device. If there is no foreground process group, tcgetpgrp returns an invalid process ID.
If an error occurs, tcgetpgrp returns -1 and the global variable errno is set to indicate the error, as follows: [EBADF] The fd argument is not a valid file descriptor. [ENOTTY] The calling process does not have a controlling termi- nal or the underlying terminal device represented by fd is not the controlling terminal.
setpgid(2), setsid(2), tcsetpgrp(3)
The tcgetpgrp function conforms to ISO/IEC 9945-1:1990 (``POSIX.1''). NetBSD 9.0 June 4, 1993 NetBSD 9.0
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