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Lesson 32 - Bash Clone (Bash项目)

参考资料

BashClone 项目设计

  • 整个项目新建一个目录 bashclone

  • 每个命令单独建一个目录，目录名就是生成的可执行文件名

    • mycp
    • readelf
    • sed
    • math
    • more
    • sort
    • ll

  • 根目录下的主要文件

    • main.c shell.c
    • Makefile

  • make all

    • 编译整个项目

  • make test

    • 单独测试每个命令

./bashclone 执行程序

limingth@gmail ~/Github/NCCL.codes/Lesson-32$ ./bashclone 
demo argc & argv 
NCCL# mycp /usr/include/stdio.h stdio.h

NCCL# readelf shell.o
n = 1
HSIZE = 48
type = 1
Type: REL

NCCL# readelf bashclone
n = 1
HSIZE = 48
type = 2
Type: EXEC

NCCL# sed 's/unix/linux'
I love unix, unix is a great os. unix is better than linux.
I love linux', unix is a great os. unix is better than linux.

NCCL# sed 's/unix/linux/g'
I love unix, unix is a great os. unix is better than linux.
I love linux', linux is a great os. linux is better than linux.

NCCL# sed 's/unix/linux/3'
I love unix, unix is a great os. unix is better than linux.
I love unix', unix is a great os. linux is better than linux.

NCCL# math sin 1
result = 0.841471

NCCL# math sqrt 2
result = 1.414214

NCCL# more test.txt
lines = 7
w = 89, h = 27
1 red
5 black
15 blue
30 green 
17 yello
2 blue
15 blue

NCCL# sort test.txt
1 red
5 black
15 blue
30 green 
17 yello
2 blue
15 blue
--- after sort ---
1 red
15 blue
15 blue
17 yello
2 blue
30 green 
5 black

NCCL# sort test.txt -n
1 red
5 black
15 blue
30 green 
17 yello
2 blue
15 blue
--- after sort ---
1 red
2 blue
5 black
15 blue
15 blue
17 yello
30 green 

NCCL# sort test.txt -u
1 red
5 black
15 blue
30 green 
17 yello
2 blue
15 blue
--- after sort ---
1 red
2 blue
5 black
15 blue
17 yello
30 green 

NCCL# sort test.txt -r
1 red
5 black
15 blue
30 green 
17 yello
2 blue
15 blue
--- after sort ---
5 black
30 green 
2 blue
17 yello
15 blue
1 red

NCCL# ll test.txt
Access mode: 0100644
file uid = limingth
file size = 56
file last modify mtime = Sat Jan 25 00:12:24 2014
The time is 01 25 00:12:24 2014

NCCL# ll test.txt -i
file st_ino = 16128001

NCCL# ll test.txt -s
file st_blocks = 8

NCCL# ll test.txt -T
The time is 01 25 00:12:24 2014