Corpus for getpgrp:

Coverage	Program
4663	sched_setaffinity-perf_event_open-signalfd4-socket$inet6_udp-socket$inet6_tcp-bind$inet6-connect$inet6-shutdown-socket$nl_route-getresgid-ioctl$AUTOFS_DEV_IOCTL_REQUESTER-fchown-getgroups-mount$9p_fd-sched_setaffinity-syz_init_net_socket$bt_sco-getpgrp-perf_event_open
3216	syz_emit_vhci-syz_emit_vhci-syz_init_net_socket$bt_sco-perf_event_open-socket$inet6_tcp-bind$inet6-ioctl$PERF_EVENT_IOC_MODIFY_ATTRIBUTES-connect$inet6-gettid-socket$nl_route-perf_event_open-sendmsg$netlink-getpgid-fcntl$setown-getpgrp-getsockopt$sock_cred-bind$inet6-syz_emit_vhci-syz_emit_vhci
2821	sched_setaffinity-perf_event_open-getpgrp-clone3-getpid-process_vm_readv-syz_open_dev$tty20-ioctl$TCXONC
1374	sched_setaffinity-perf_event_open-syz_init_net_socket$bt_sco-dup2-bind$bt_sco-keyctl$chown-getpgrp-wait4-syz_open_dev$tty20-writev-ioctl$KDFONTOP_SET_DEF