thanks tyfkda

cmosgetdate() for system-call homework

the day of reckoning has come for the debug port "Shutdown" hack.

instead of mucking with ACPI or using a new hack, the student will now write
sys_date() usin

cmosgetdate() for system-call homework

the day of reckoning has come for the debug port "Shutdown" hack.

instead of mucking with ACPI or using a new hack, the student will now write
sys_date() using the cmosgetdate() helper.

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make new code like old code

Variable declarations at top of function,
separate from initialization.

Use == 0 instead of ! for checking pointers.

Consistent spacing around {, *, casts.

Declare 0-p

make new code like old code

Variable declarations at top of function,
separate from initialization.

Use == 0 instead of ! for checking pointers.

Consistent spacing around {, *, casts.

Declare 0-parameter functions as (void) not ().

Integer valued functions return -1 on failure, 0 on success.

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set only PG and WP in vminit; the rest don't seem to be needed and are confusing

Remove memcpy prototypes at Russ' request to prevent code from calling
memcpy directly.

Provide memcpy for compatibility with older versions of gcc

add struct stat decl

Replace yield system call with sleep.

Remove struct uinode.
Remove type arg to mknod (assume T_DEV).

Remove puts in favor of printf.
Allow multiple arguments to ls.

PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf

Various changes made while offline.

+ bwrite sector argument is redundant; use b->sector.
+ reformatting of files for nicer PDF page breaks
+ distinguis

PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf

Various changes made while offline.

+ bwrite sector argument is redundant; use b->sector.
+ reformatting of files for nicer PDF page breaks
+ distinguish between locked, unlocked inodes in type signatures
+ change FD_FILE to FD_INODE
+ move userinit (nee proc0init) to proc.c
+ move ROOTDEV to param.h
+ always parenthesize sizeof argument

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standardize on not using unsigned keyword

atoi, for kill

standardize various * conventions

nits

bug in sbrk
test malloc

user-level malloc (untested)
nit in sbrk
indirect block
fix dup to share fd struct

i/o redirection in sh
better parsing of sh commands (copied from jos sh)
cat: read from 1 if no args
sbrk system call, but untested
getpid system call
moved locks in keyboard intr, but why do we get

i/o redirection in sh
better parsing of sh commands (copied from jos sh)
cat: read from 1 if no args
sbrk system call, but untested
getpid system call
moved locks in keyboard intr, but why do we get intr w. null characters from keyboard?

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removed block system call
renumber system calls (run gmake clean!)
skeleton for dup system call

chdir
cd in shell
nits in mkdir, ls, etc.

start on mkdir
stat

link()

fix getblk to actually lock the block
no more cons_put system calls
usertests tests two processes writing files

fstat
primitive ls

init creates console, opens 0/1/2, runs sh
sh accepts 0-argument commands (like userfs)
reads from console