Bash Programming. Please code in Bash.
Ex. 2 A bash script for file search and content display (12 Points) Search is a very essential form of interaction with the contents stored in a file system. In this task, you will write a bash shell script seeker.sh that will look for file names with a specific string in the file name and optionally display its contents to the screen. The usage syntax for the script is as follows. $ /seeker.sh [-c] [-a] pattern [path] The options arguments in square brackets are optional, and their intent is as follows. -c indicates that the script should display the contents of the file. Otherwise only the absolute path to the file (including file name) is displayed to the screen. -a indicates that if there are multiple matching files, the output should include all of them. Otherwise only (any) one of the file is included in the output. path is the absolute path to the directory under which the script should look for the files. If this argument is not passed to the script, it is expected to look for files under the "current directory. pattern is a string that you want the script to look for in the name of a file (NOT contents of the file). For example if pattern is msg, it should match the file names mymsg.txt, msg.txt, random.msg, lastmsgs.txt, etc. An example output of this script is as below. $ /seeker.sh -C -a msg /mydata/scribbles ==== Contents of: /mydata/scribbles/msg2.txt ==== Hi, I am msg2.txt Not all those who wander are lost. ==== Contents of: /mydata/scribbles/msg.txt ==== Hello there, I am msg.txt 2 Points for writing code with proper (readability) indentation and writing necessary comments (required to un- derstand the logic, etc.) in the code. 1.Use vi to create your script in mimi.cs.mcgill.ca. 2.Ensure that your script can be executed using bash shell. 3.(2 Points) Ensure that your script is passed proper arguments. pattern is the only mandatory input to the script. An appropriate error and usage message should be raised if proper arguments are not passed into the script. See examples below. $ ./seeker.sh Error missing the pattern argument. Usage ./seeker.sh [-c] [-a] pattern [path] $ ./seeker.sh-C Error missing the pattern argument. Usage ./seeker.sh [-c] [-a] pattern [path] $ ./seeker.sh -a Error missing the pattern argument. Usage ./seeker.sh [-c] [-a) pattern [path] $ ./seeker.sh -c -a Error missing the pattern argument. Usage ./seeker.sh [-c] [-a] pattern [path] 4.(1 Point) If the directory passed as argument to the script does not exist, the script should display this fact. $ ./seeker.sh msg osuchdir Error osuchdir is not a valid directory $ ./seeker.sh -a msg osuchdir Error osuchdir is not a valid directory 5.(1 Point) If script cannot find any files with the specified pattern in its name, it should display this information. $ ./ seeker.sh -a meow /etc/cron.d Unable to locate any files that has pattern meow in its name in /etc/cron.d. 6.(1 Point) When -a option is not passed, include only (any) one matching file in the output. $ ./seeker.sh msg /scribbles/messages /scribbles/messages/msg2.txt 7.(1 Point) When -a option is passed, include all the files that match the pattern $ ./seeker.sh -a msg /scribbles/messages /scribbles/messages/msg2.txt /scribbles/messages/msg.txt 8.(2 Points) When -c option is passed, contents of the files must be displayed $ ./seeker.sh -c msg /scribbles/messages ==== Contents of: /scribbles/messages/msg2.txt ==== Hi, I am msg2.txt Not all those who wander are lost. $ ./seeker.sh -c -a msg /scribbles/messages ==== Contents of: /scribbles/messages/msg2.txt ==== Hi, I am msg2.txt Not all those who wander are lost. ==== Contents of: /scribbles/messages/msg.txt ==== Hello there, I am msg.txt 9.(2 Points) When path argument to indicate the directory to look for files is not passed, search in the current directory. $ cd /scribbles/messages $ ./seeker.sh-C-a msg ==== Contents of: /scribbles/messages/msg2.txt ==== Hi, I am msg2.txt Not all those who wander are lost. ==== Contents of: /scribbles/messages/msg.txt ==== Hello there, I am msg.txt Ex. 2 A bash script for file search and content display (12 Points) Search is a very essential form of interaction with the contents stored in a file system. In this task, you will write a bash shell script seeker.sh that will look for file names with a specific string in the file name and optionally display its contents to the screen. The usage syntax for the script is as follows. $ /seeker.sh [-c] [-a] pattern [path] The options arguments in square brackets are optional, and their intent is as follows. -c indicates that the script should display the contents of the file. Otherwise only the absolute path to the file (including file name) is displayed to the screen. -a indicates that if there are multiple matching files, the output should include all of them. Otherwise only (any) one of the file is included in the output. path is the absolute path to the directory under which the script should look for the files. If this argument is not passed to the script, it is expected to look for files under the "current directory. pattern is a string that you want the script to look for in the name of a file (NOT contents of the file). For example if pattern is msg, it should match the file names mymsg.txt, msg.txt, random.msg, lastmsgs.txt, etc. An example output of this script is as below. $ /seeker.sh -C -a msg /mydata/scribbles ==== Contents of: /mydata/scribbles/msg2.txt ==== Hi, I am msg2.txt Not all those who wander are lost. ==== Contents of: /mydata/scribbles/msg.txt ==== Hello there, I am msg.txt 2 Points for writing code with proper (readability) indentation and writing necessary comments (required to un- derstand the logic, etc.) in the code. 1.Use vi to create your script in mimi.cs.mcgill.ca. 2.Ensure that your script can be executed using bash shell. 3.(2 Points) Ensure that your script is passed proper arguments. pattern is the only mandatory input to the script. An appropriate error and usage message should be raised if proper arguments are not passed into the script. See examples below. $ ./seeker.sh Error missing the pattern argument. Usage ./seeker.sh [-c] [-a] pattern [path] $ ./seeker.sh-C Error missing the pattern argument. Usage ./seeker.sh [-c] [-a] pattern [path] $ ./seeker.sh -a Error missing the pattern argument. Usage ./seeker.sh [-c] [-a) pattern [path] $ ./seeker.sh -c -a Error missing the pattern argument. Usage ./seeker.sh [-c] [-a] pattern [path] 4.(1 Point) If the directory passed as argument to the script does not exist, the script should display this fact. $ ./seeker.sh msg osuchdir Error osuchdir is not a valid directory $ ./seeker.sh -a msg osuchdir Error osuchdir is not a valid directory 5.(1 Point) If script cannot find any files with the specified pattern in its name, it should display this information. $ ./ seeker.sh -a meow /etc/cron.d Unable to locate any files that has pattern meow in its name in /etc/cron.d. 6.(1 Point) When -a option is not passed, include only (any) one matching file in the output. $ ./seeker.sh msg /scribbles/messages /scribbles/messages/msg2.txt 7.(1 Point) When -a option is passed, include all the files that match the pattern $ ./seeker.sh -a msg /scribbles/messages /scribbles/messages/msg2.txt /scribbles/messages/msg.txt 8.(2 Points) When -c option is passed, contents of the files must be displayed $ ./seeker.sh -c msg /scribbles/messages ==== Contents of: /scribbles/messages/msg2.txt ==== Hi, I am msg2.txt Not all those who wander are lost. $ ./seeker.sh -c -a msg /scribbles/messages ==== Contents of: /scribbles/messages/msg2.txt ==== Hi, I am msg2.txt Not all those who wander are lost. ==== Contents of: /scribbles/messages/msg.txt ==== Hello there, I am msg.txt 9.(2 Points) When path argument to indicate the directory to look for files is not passed, search in the current directory. $ cd /scribbles/messages $ ./seeker.sh-C-a msg ==== Contents of: /scribbles/messages/msg2.txt ==== Hi, I am msg2.txt Not all those who wander are lost. ==== Contents of: /scribbles/messages/msg.txt ==== Hello there, I am msg.txt
