43  *	diff - differential file comparison
122 #include "diff.h"
325 			(void) fprintf(stderr, "diff: ");  in main()
363 			(void) fprintf(stderr, "diff: ");  in main()
368 		(void) fprintf(stderr, "diff: ");  in main()
380 				(void) fprintf(stderr, "diff: ");  in main()
386 		(void) fprintf(stderr, "diff: ");  in main()
400 		(void) fprintf(stderr, "diff: ");  in main()
408 		(void) fprintf(stderr, "diff: ");  in main()
422 			(void) fprintf(stderr, "diff: ");  in main()
433 			/* files are the same; diff -D needs to print one */  in main()
453 			(void) fprintf(stderr, "diff: ");  in main()
720 /*		fprintf(stderr, "diff: jackpot\n");	*/  in check()
1014 				/* In this case, diff doesn't have to take */  in readhash()
1030 				/* In this case, diff needs to take care of */  in readhash()
1048 			/* In this case, diff doesn't have to take care of */  in readhash()
1062 		/* In this case, diff needs to take care of */  in readhash()
1099 /* dump accumulated "context" diff changes */
1231  * diff - directory comparison
1251 		(void) fprintf(stderr, "diff: ");  in diffdir()
1257 	(void) strcpy(title, "diff ");  in diffdir()
1351 		(void) fprintf(stderr, "diff: ");  in setfile()
1410 		(void) fprintf(stderr, "diff: ");  in setupdir()
1464 		(void) fprintf(stderr, "diff: ");  in compare()
1469 		(void) fprintf(stderr, "diff: ");  in compare()
1480 			(void) fprintf(stderr, "diff: ");  in compare()
1489 			(void) fprintf(stderr, "diff: ");  in compare()
1521 					    "diff: cannot read link\n"));  in compare()
1527 					    "diff: cannot read link\n"));  in compare()
1582 			(void) fprintf(stderr, "diff: ");  in compare()
1675 		(void) execv(diff+5, diffargv);  in calldiff()
1676 		(void) execv(diff, diffargv);  in calldiff()
1677 		perror(diff);  in calldiff()
1772  * contains a null character ("diff" doesn't handle them correctly, and
1895 			(void) fprintf(stderr, "diff: ");  in filename()
1904 			(void) fprintf(stderr, "diff: ");  in filename()
1924 		(void) fprintf(stderr, "diff: ");  in copytemp()
1934 		(void) fprintf(stderr, "diff: ");  in copytemp()
1941 			(void) fprintf(stderr, "diff: ");  in copytemp()
2031 	(void) fprintf(stderr, "diff: ");  in noroom()
2039 	(void) fprintf(stderr, "diff: ");  in error()
2049 		"usage: diff [-bitw] [-c | -e | -f | -h | -n | -u] file1 "  in usage()
2051 		"       diff [-bitw] [-C number | -U number] file1 file2\n"  in usage()
2052 		"       diff [-bitw] [-D string] file1 file2\n"  in usage()
2053 		"       diff [-bitw] [-c | -e | -f | -h | -n | -u] [-l] [-r] "  in usage()
2174 			(void) fprintf(stderr, "diff: ");  in getbufwchar()
2195 			(void) fprintf(stderr, "diff: ");  in getbufwchar()