AUPE the source code, is a convenient self-study. The compile time errors can be neglected.

Advanced Programming in the UNIX Environment
............................................\advio
............................................\.....\catgetmsg.c
............................................\.....\devzero.c
............................................\.....\Makefile
............................................\.....\mcopy.c
............................................\.....\nonblockw.c
............................................\.....\ourhdr.h
............................................\.....\pollpipe.c
............................................\.....\selectpipe.c
............................................\app-b1.c
............................................\app-b2.c
............................................\call
............................................\....\call.c
............................................\....\call.h
............................................\....\escape.c
............................................\....\loop.c
............................................\....\main.c
............................................\....\Makefile
............................................\....\put.c
............................................\....\take.c
............................................\....\takeput.c
............................................\calld
............................................\.....\calld.h
............................................\.....\childdial.c
............................................\.....\cliargs.c
............................................\.....\client.c
............................................\.....\ctlstr.c
............................................\.....\debug.c
............................................\.....\devfile.c
............................................\.....\dialfile.c
............................................\.....\expectstr.c
............................................\.....\lock.c
............................................\.....\loop.c
............................................\.....\main.c
............................................\.....\Makefile
............................................\.....\request.c
............................................\.....\sendstr.c
............................................\.....\sigchld.c
............................................\.....\sysfile.c
............................................\.....\ttydial.c
............................................\.....\ttyopen.c
............................................\datafiles
............................................\.........\getpw44bsd.c
............................................\.........\getpwnam.c
............................................\.........\getpwsvr4.c
............................................\.........\Makefile
............................................\.........\prtime.c
............................................\db.lock.fine
............................................\............\alloc.c
............................................\............\checkfree.c
............................................\............\close.c
............................................\............\db.h
............................................\............\delete.c
............................................\............\dodelete.c
............................................\............\fetch.c
............................................\............\find.c
............................................\............\findfree.c
............................................\............\free.c
............................................\............\hash.c
............................................\............\Makefile
............................................\............\nextrec.c
............................................\............\open.c
............................................\............\readdat.c
............................................\............\readidx.c
............................................\............\readptr.c
............................................\..........

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