Corpus for getpgrp:

Coverage	Program
2531	perf_event_open-write$binfmt_elf64-creat-ioctl$AUTOFS_DEV_IOCTL_OPENMOUNT-getpgrp-fcntl$lock-mmap$IORING_OFF_SQ_RING-ioctl$AUTOFS_DEV_IOCTL_PROTOSUBVER-dup-dup-ioctl$AUTOFS_DEV_IOCTL_CATATONIC-syz_io_uring_submit-ioctl$FS_IOC_GETFSMAP-ioctl$sock_SIOCETHTOOL-sendmsg$nl_generic-signalfd4-prlimit64
427	syz_io_uring_setup-syz_io_uring_submit-pipe2-syz_io_uring_setup-socket$inet6_tcp-mmap$IORING_OFF_SQ_RING-perf_event_open-getpgrp-pidfd_open-syz_io_uring_submit-io_uring_enter
105	getpgrp-getpgid