4.3BSD/usr/contrib/spms/src/lib/libspms/test/mustfopen.a

!<arch>
Omustfopen      418696330   968   27    100644  29        `
Tmustfopen: can't open ?????

Tmustfopen.c    418696334   968   27    100644  222       `
/*
 * mustfopen()
 */
#include <stdio.h>

char *PGN = "Tmustfopen";		/* program name */

main()
{
	FILE *mustfopen();		/* must open file */
	FILE *stream;			/* file stream */

	stream = mustfopen("?????","r");
	exit(0);
}
Tmustfopen.sh   418870308   968   27    100755  143       `
#!/bin/csh -f
#
# mustfopen()
#
Tmustfopen >& T_OUTPUT
cat T_OUTPUT | diff - Omustfopen
set diffstatus = $status
rm T_OUTPUT
exit($diffstatus)