Corpus for getpgrp:

Coverage	Program
3579	perf_event_open-syz_open_procfs-readv-syz_open_procfs-syz_mount_image$ext4-mount$9p_unix-syz_mount_image$tmpfs-mkdir-pread64-ioctl$PERF_EVENT_IOC_ENABLE-mount$bind-umount2-getpgrp-fcntl$dupfd-ioctl$BLKTRACESETUP-socket$inet6_udplite-recvfrom