COMP2521 21T3 Assignment 1 PDF

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COMP2521 21T3 Assignment 1,an assignment on File systems in linux...

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12/10/2021, 10:39

COMP2521 21T3 - Assignment 1

[08/10 10:00] [09/10 16:30]

FsMkfile

/(root)

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COMP2521 21T3 - Assignment 1

/home cd

/ .

-

_ .

..

. ls

ls . .

.

..

/

/ /tmp

tmp

/tmp/tmp.123 /tmp//tmp.123

tmp.123 tmp.123

tmp tmp

tmp /(root)

bin

ls

etc

mv

passwd

home

ssh

jas

init

tmp

tmp.123

tmp.456

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COMP2521 21T3 - Assignment 1

.

..

passwd

/home/jas/cs2521/lecs ../cs2521/labs

/etc/

/ /home /home/jas /home/jas/cs2521 .. ../cs2521

/home/jas/cs2521/lecs

/home/jas

../cs2521/labs

/ /home /home/jas

/home/jas/cs2521

$ unzip /web/cs2521/21T3/ass/ass1/downloads/files.zip

files.zip

unz

Makefile Fs.h Fs.c utility.h utility.c FileType.h listFile.c

listFile

testFs.c make testFsColored

listFile

testFs Fs.c utility.c

utility.h Fs.c utility.c

testFs.c

utilit

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COMP2521 21T3 - Assignment 1

FsGetCwd void FsGetCwd(Fs fs, char cwd[PATH_MAX + 1]);

cw PATH_MAX

FsFree void FsFree(Fs fs);

Fs

FsMkdir void FsMkdir(Fs fs, char *path);

FsMk mkdir

mkdir: cannot create directory 'path': Fi mkdir: cannot create directory 'path': No mkdir: cannot create directory 'path': No

path labs/lab01

labs/lab01

mkdir: cannot create directory 'labs/lab01': File exists

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COMP2521 21T3 - Assignment 1

int main(void) { Fs fs = FsNew(); // this is equivalent to FsMkdir(fs, "tmp"); because initially, // the current working directory is the root directory FsMkdir(fs, "/tmp"); FsMkdir(fs, "/tmp/tmp.123"); FsMkdir(fs, "/usr"); FsMkdir(fs, "/bin"); // see the section for FsTree for details FsTree(fs, NULL); }

/ bin tmp tmp.123 usr

FsMkfile void FsMkfile(Fs fs, char *path);

touch

mkfile: cannot create file 'path': File mkfile: cannot create file 'path': Not a mkfile: cannot create file 'path': No su

int main(void) {

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COMP2521 21T3 - Assignment 1

/ bin mkdir mkfile hello.c world.c

FsCd void FsCd(Fs fs, char *path);

NULL NULL NULL cd

cd: 'path': Not a directory cd: 'path': No such file or direc

int main(void) { Fs fs = FsNew(); FsMkdir(fs, "/home"); FsCd(fs, "home"); FsMkdir(fs, "jas"); FsCd(fs, "jas"); FsMkdir(fs, "cs2521"); FsCd(fs, "cs2521"); FsMkdir(fs, "lectures"); FsMkdir(fs, "tutes"); FsMkdir(fs, "labs"); FsTree(fs, NULL); }

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COMP2521 21T3 - Assignment 1

NULL ls

ls: cannot access 'path': Not a dire ls: cannot access 'path': No such fi

int main(void) { Fs fs = FsNew(); printf("---\n"); // marker to separate output FsLs(fs, "/"); printf("---\n"); FsMkfile(fs, "hello.txt"); FsMkdir(fs, "tmp"); FsLs(fs, "/"); }

----hello.txt tmp

FsPwd void FsPwd(Fs fs);

pwd

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COMP2521 21T3 - Assignment 1

FsTree void FsTree(Fs fs, char *path);

NULL NULL NULL tree

tree: 'path': Not a directory tree: 'path': No such file or dire

int main(void) { Fs fs = FsNew(); FsMkfile(fs, "hello.txt"); FsMkfile(fs, "world.txt"); FsMkdir(fs, "bin"); FsMkfile(fs, "bin/ls"); FsMkfile(fs, "bin/pwd"); FsMkdir(fs, "home"); FsMkdir(fs, "home/jas"); FsMkfile(fs, "home/jas/todo.txt"); FsMkfile(fs, "home/jas/mail.txt"); FsTree(fs, "/home/jas"); printf("---\n"); // marker to separate output FsTree(fs, NULL); }

/home/jas il t t

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COMP2521 21T3 - Assignment 1

FsPut void FsPut(Fs fs, char *path, char *content);

put: 'path': Is a directory put: 'path': Not a directory put: 'path': No such file or

int main(void) { Fs fs = FsNew(); FsMkfile(fs, "hello.txt"); FsPut(fs, "hello.txt", "hello\n"); FsPut(fs, "./hello.txt", "world\n"); // overwrites existing content }

FsCat void FsCat(Fs fs, char *path);

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COMP2521 21T3 - Assignment 1

int main(void) { Fs fs = FsNew(); FsMkfile(fs, "hello.txt"); FsPut(fs, "hello.txt", "hello\n"); FsCat(fs, "hello.txt"); FsPut(fs, "./hello.txt", "world\n"); // overwrites existing content FsCat(fs, "/hello.txt"); }

hello world

FsDldir void FsDldir(Fs fs, char *path);

rmdir

dldir: failed to remove 'path': Directo dldir: failed to remove 'path': Not a d dldir: failed to remove 'path': No such

int main(void) { Fs fs = FsNew(); FsMkdir(fs, "hello"); FsMkdir(fs, "hello/world"); FsTree(fs, NULL); printf("---\n"); // marker to separate output FsDldir(fs, "hello/world"); FsDldir(fs, "hello");

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COMP2521 21T3 - Assignment 1

rm

rm mktemp -d cd

recursive

dl: cannot remove 'path': Is a dl: cannot remove 'path': Not dl: cannot remove 'path': No s

int main(void) { Fs fs = FsNew(); FsMkdir(fs, "hello"); FsMkfile(fs, "hello/world.txt"); FsMkfile(fs, "abc.txt"); FsTree(fs, NULL); printf("---\n"); // marker to separate output FsDl(fs, true, "abc.txt"); FsTree(fs, NULL); printf("---\n"); // marker to separate output FsDl(fs, true, "hello"); FsTree(fs, NULL); }

/ abc.txt hello world.txt --/ hello

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COMP2521 21T3 - Assignment 1

NULL src

src

dest

src src

dest

src dest dest

recursive cp

cp

cp

src

int main(void) { Fs fs = FsNew(); FsMkfile(fs, "hello.txt"); FsPut(fs, "hello.txt", "hello\n"); FsMkfile(fs, "world.txt"); FsPut(fs, "world.txt", "world\n"); FsCat(fs, "world.txt"); printf("---\n"); char *src[] = { "hello.txt", NULL }; FsCp(fs, false, src, "world.txt"); FsCat(fs, "world.txt"); printf("---\n"); FsTree(fs, NULL); }

world --hello --/ hello.txt world.txt

src dest

dest

src

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COMP2521 21T3 - Assignment 1

FsMv void FsMv(Fs fs, char *src[], char *dest);

NULL

src

dest

dest mv bin

/(root)

etc

passwd

ssh

...

tmp

init

home

bin

jas

tmp.123

tmp.456

...

... ls

mv

testFs.c char *src[] = { "/bin", NULL }; FsMv(fs, src, "/tmp");

mv

src src

mv

int main(void) { Fs fs = FsNew(); (

)

tmpdir

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COMP2521 21T3 - Assignment 1

dest

src

dest

path

FsMkdir

NULL

testFs.c

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COMP2521 21T3 - Assignment 1

Fs

valgrind $ valgrind -q --leak-check=full ./testFs > /dev/null

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COMP2521 21T3 - Assignment 1...