rmail/sendmail (BSD4.2) problem.

[eric%ucbarpa at UCB-VAX.ARPA]

From:  Eric Allman <eric%ucbarpa at UCB-VAX.ARPA>

In the initial 4.2 release there was a bug in /bin/mail that caused
incoming UUCP mail to be discarded, although /bin/mail returned a
zero ("ok") exit status (this caused sendmail to falsely assume that
the mail had been successfully delivered).  The command "what /bin/mail"
will verify this -- if mail.c is version 4.18, you have the problem.

The fix is:


Sep  8 15:41 1984  SCCS/s.mail.c: -r4.18 vs. -r4.19 Page 1


449,453c449,457
< 			if (strcmp(my_name, "root") &&
< 			    strcmp(my_name, "daemon") &&
< 			    strcmp(my_name, "network")) {
< 				usage();
< 				done();
---
> 			if (strcmp(my_name, "root") == 0 ||
> 			    strcmp(my_name, "daemon") == 0 ||
> 			    strcmp(my_name, "network") == 0 ||
> 			    strcmp(my_name, "uucp")) {
> 				gaver++;
> 				strcpy(truename, argv[1]);
> 				fgets(line, LSIZE, stdin);
> 				if (strncmp("From", line, 4) == 0)
> 					line[0] = '\0';
455,459d458
< 			gaver++;
< 			strcpy(truename, argv[1]);
< 			fgets(line, LSIZE, stdin);
< 			if (strcmpn("From", line, 4) == 0)
< 				line[0] = '\0';
494c493
< 		if (strcmpn("From", line, 4) == 0)
---
> 		if (strncmp("From", line, 4) == 0)

THIS FIX IS CRITICAL!!!!  Do not fail to install it.

Later 4.2 tapes (I'm not sure the relevant serial number) have the fix).

eric allman