https://doku.sergev.org/ 2026-04-07T07:23:33+00:00 https://doku.sergev.org/ https://doku.sergev.org/lib/tpl/dokuwiki/images/favicon.ico text/html 2006-07-26T14:34:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://doku.sergev.org/unix-history/unix-v6/usr/sys/buf.h?rev=1153924496&do=diff Unix V6 /usr/sys/buf.h /* * Each buffer in the pool is usually doubly linked into 2 lists: * the device with which it is currently associated (always) * and also on a list of blocks available for allocation * for other use (usually). * The latter list is kept in last-used order, and the two * lists are doubly linked to make it easy to remove * a buffer from one list when it was found by * looking through the other. * A buffer is on the available list, and is liable * to be reassigned… text/html 2006-07-26T14:34:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://doku.sergev.org/unix-history/unix-v6/usr/sys/conf.h?rev=1153924496&do=diff Unix V6 /usr/sys/conf.h /* * Used to dissect integer device code * into major (driver designation) and * minor (driver parameter) parts. */ struct { char d_minor; char d_major; }; /* * Declaration of block device * switch. Each entry (row) is * the only link between the * main unix code and the driver. * The initialization of the * device switches is in the * file conf.c. */ struct bdevsw { int (*d_open)(); int (*d_close)(); int (*d_strategy)(); int *d_tab; } bdevsw[]; /* … text/html 2006-07-26T14:34:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://doku.sergev.org/unix-history/unix-v6/usr/sys/file.h?rev=1153924496&do=diff Unix V6 /usr/sys/file.h /* * One file structure is allocated * for each open/creat/pipe call. * Main use is to hold the read/write * pointer associated with each open * file. */ struct file { char f_flag; char f_count; /* reference count */ int f_inode; /* pointer to inode structure */ char *f_offset[2]; /* read/write character pointer */ } file[NFILE]; /* flags */ #define FREAD 01 #define FWRITE 02 #define FPIPE 04 text/html 2006-07-26T14:34:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://doku.sergev.org/unix-history/unix-v6/usr/sys/filsys.h?rev=1153924496&do=diff Unix V6 /usr/sys/filsys.h /* * Definition of the unix super block. * The root super block is allocated and * read in iinit/alloc.c. Subsequently * a super block is allocated and read * with each mount (smount/sys3.c) and * released with unmount (sumount/sys3.c). * A disk block is ripped off for storage. * See alloc.c for general alloc/free * routines for free list and I list. */ struct filsys { int s_isize; /* size in blocks of I list */ int s_fsize; /* size in blocks of entire vol… text/html 2006-07-26T14:34:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://doku.sergev.org/unix-history/unix-v6/usr/sys/ino.h?rev=1153924496&do=diff Unix V6 /usr/sys/ino.h /* * Inode structure as it appears on * the disk. Not used by the system, * but by things like check, df, dump. */ struct inode { int i_mode; char i_nlink; char i_uid; char i_gid; char i_size0; char *i_size1; int i_addr[8]; int i_atime[2]; int i_mtime[2]; }; /* modes */ #define IALLOC 0100000 #define IFMT 060000 #define IFDIR 040000 #define IFCHR 020000 #define IFBLK 060000 #define ILARG 010000 #define ISUID 04000 #define ISGID 02000 #define ISVTX 01000 #de… text/html 2006-07-26T14:34:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://doku.sergev.org/unix-history/unix-v6/usr/sys/inode.h?rev=1153924496&do=diff Unix V6 /usr/sys/inode.h /* * The I node is the focus of all * file activity in unix. There is a unique * inode allocated for each active file, * each current directory, each mounted-on * file, text file, and the root. An inode is 'named' * by its dev/inumber pair. (iget/iget.c) * Data, from mode on, is read in * from permanent inode on volume. */ struct inode { char i_flag; char i_count; /* reference count */ int i_dev; /* device where inode resides */ int i_number; /* i number,… text/html 2006-07-26T14:34:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://doku.sergev.org/unix-history/unix-v6/usr/sys/param.h?rev=1153924496&do=diff Unix V6 /usr/sys/param.h /* * tunable variables */ #define NBUF 15 /* size of buffer cache */ #define NINODE 100 /* number of in core inodes */ #define NFILE 100 /* number of in core file structures */ #define NMOUNT 5 /* number of mountable file systems */ #define NEXEC 3 /* number of simultaneous exec's */ #define MAXMEM (64*32) /* max core per process - first # is Kw */ #define SSIZE 20 /* initial stack size (*64 bytes) */ #define SINCR 20 /* increment of stack (*64 bytes) */ #de… text/html 2006-07-26T14:34:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://doku.sergev.org/unix-history/unix-v6/usr/sys/proc.h?rev=1153924496&do=diff Unix V6 /usr/sys/proc.h /* * One structure allocated per active * process. It contains all data needed * about the process while the * process may be swapped out. * Other per process data (user.h) * is swapped with the process. */ struct proc { char p_stat; char p_flag; char p_pri; /* priority, negative is high */ char p_sig; /* signal number sent to this process */ char p_uid; /* user id, used to direct tty signals */ char p_time; /* resident time for scheduling */ char p_cp… text/html 2006-07-26T14:34:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://doku.sergev.org/unix-history/unix-v6/usr/sys/reg.h?rev=1153924496&do=diff Unix V6 /usr/sys/reg.h /* * Location of the users' stored * registers relative to R0. * Usage is u.u_ar0[XX]. */ #define R0 (0) #define R1 (-2) #define R2 (-9) #define R3 (-8) #define R4 (-7) #define R5 (-6) #define R6 (-3) #define R7 (1) #define RPS (2) #define TBIT 020 /* PS trace bit */ text/html 2006-07-26T14:34:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://doku.sergev.org/unix-history/unix-v6/usr/sys/run?rev=1153924496&do=diff Unix V6 /usr/sys/run chdir ken cc -c -O *.c ar r ../lib1 rm *.o chdir ../dmr cc -c -O *.c ar r ../lib2 rm *.o chdir ../conf as m40.s mv a.out m40.o : as m45.s : mv a.out m45.o : cc sysfix.c : mv a.out sysfix cc mkconf.c mv a.out mkconf mkconf rk tm tc done cc -c c.c as l.s ld -x a.out m40.o c.o ../lib1 ../lib2 : as data.s l.s : ld -x -r -d a.out m45.o c.o ../lib1 ../lib2 : nm -ug : sysfix a.out x : mv x a.out cmp a.out /rkunix cp a.out /rkunix mkconf rp tm tc done cc -c c.c as l.s ld -x … text/html 2006-07-26T14:34:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://doku.sergev.org/unix-history/unix-v6/usr/sys/seg.h?rev=1153924496&do=diff Unix V6 /usr/sys/seg.h /* * KT-11 addresses and bits. */ #define UISD 0177600 /* first user I-space descriptor register */ #define UISA 0177640 /* first user I-space address register */ #define UDSA 0177660 /* first user D-space address register */ #define RO 02 /* access abilities */ #define WO 04 #define RW 06 #define ED 010 /* extend direction */ /* * structure used to address * a sequence of integers. */ struct { int r[]; }; int *ka6; /* 11/40 KISA6; 11/45 KDSA6 */ /* * add… text/html 2006-07-26T14:34:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://doku.sergev.org/unix-history/unix-v6/usr/sys/systm.h?rev=1153924496&do=diff Unix V6 /usr/sys/systm.h /* * Random set of variables * used by more than one * routine. */ char canonb[CANBSIZ]; /* buffer for erase and kill (#@) */ int coremap[CMAPSIZ]; /* space for core allocation */ int swapmap[SMAPSIZ]; /* space for swap allocation */ int *rootdir; /* pointer to inode of root directory */ int cputype; /* type of cpu =40, 45, or 70 */ int execnt; /* number of processes in exec */ int lbolt; /* time of day in 60th not in time */ int time[2]; /* time in sec from… text/html 2006-07-26T14:34:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://doku.sergev.org/unix-history/unix-v6/usr/sys/text.h?rev=1153924496&do=diff Unix V6 /usr/sys/text.h /* * Text structure. * One allocated per pure * procedure on swap device. * Manipulated by text.c */ struct text { int x_daddr; /* disk address of segment */ int x_caddr; /* core address, if loaded */ int x_size; /* size (*64) */ int *x_iptr; /* inode of prototype */ char x_count; /* reference count */ char x_ccount; /* number of loaded references */ } text[NTEXT]; text/html 2006-07-26T14:34:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://doku.sergev.org/unix-history/unix-v6/usr/sys/tty.h?rev=1153924496&do=diff Unix V6 /usr/sys/tty.h /* * A clist structure is the head * of a linked list queue of characters. * The characters are stored in 4-word * blocks containing a link and 6 characters. * The routines getc and putc (m45.s or m40.s) * manipulate these structures. */ struct clist { int c_cc; /* character count */ int c_cf; /* pointer to first block */ int c_cl; /* pointer to last block */ }; /* * A tty structure is needed for * each UNIX character device that * is used for normal ter… text/html 2006-07-26T14:34:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://doku.sergev.org/unix-history/unix-v6/usr/sys/user.h?rev=1153924496&do=diff Unix V6 /usr/sys/user.h /* * The user structure. * One allocated per process. * Contains all per process data * that doesn't need to be referenced * while the process is swapped. * The user block is USIZE*64 bytes * long; resides at virtual kernel * loc 140000; contains the system * stack per user; is cross referenced * with the proc structure for the * same process. */ struct user { int u_rsav[2]; /* save r5,r6 when exchanging stacks */ int u_fsav[25]; /* save fp registers */ …