Addenda to UNIX 7th edition distribution tape, 12/2/80. Format: tar(1), 800 bpi. Contents: README: this descriptive file. lp.c: the missing line printer driver that belongs in /usr/sys/dev/lp.c. The program comes from PWB, and needs minor changes to work in version 7; see comment at head of program. lpr: a directory containing the lpr utility and its daemon lpd. See lpr/makefile for instructions on putting it together. lpd.8: the manual section for the line printer daemon. fgrep.c: new source for fgrep(1) corrects certain troubles with keys with common prefixes c2: directory containing C optimizer cured of certain instances of overoptimism. The existing C makefile works awk: directory with complete new awk processor, see README and makefile therein tmac.r: macros to simulate old "roff" in "nroff", to support -mr option mentioned in roff(1) f77: directory with complete new fortran compiler, contains makefiles. Further improvements to the I/O library have been made at UC Berkeley, and may be obtainable from them. malloc.c: new source for malloc(3) corrects rare bug dev: directory with more robust mag tape drivers for /usr/sys/dev fsck: directory with new, stringent file system checking program and manual section, far superior to old [ind]check. It checks some data not maintained by v7, in particular superblock counts; resulting complaints are harmless Other bug fixes: /usr/sys/h/param.h: CMAPSIZ and SMAPSIZ should both be defined as (NPROC/2) otherwise trouble will occur with very large /usr/sys/conf/low.s: replace br7+7. with br7+10. memories /usr/src/cmd/sed/sed0.c: delete continue after case '\0' in compile() /usr/src/cmd/cu.c: args 1 and 2 of some ioctl calls may be interchanged a ~ may be lacking from references to ECHO or CRMOD in case (f == 1) of mode(f) The following bugs exist, no fix is included. (1) adb does not report floating registers correctly (2) ldiv, lmod fail with largest negative dividend (these implement division of longs in C); the division (unsigned)32768/1 also fails (3) dump(1) maintains ddate incorrectly. This bug is relatively innocuous; it causes more dumping than necessary on some occasions. (4) join(1) treats null keys as end of file (5) sort -t includes the following tab in some field comparisons (6) hs(4) is irrevocably lost (7) exec writes arguments into swap space with buffered I/O, which may happen physically much later, after the space has been used for a core image. The solution is to preallocate a portion of swap space to this single purpose. (8) break is turned into a DEL regardless of what the current interrupt character is (?) and others, see warranty