#include "find. h$"$

extern char$*$ strstr$\_$w$\_$option$($char$*$ haystack, char$*$ needle, flags option$)$;

extern void quicksort$($char$*v[],$ int left, int right$)$;

char $*$lineptr$[$MAX$\_$LINES$]$;

int readlines$()\{$

int len, nlines $=0$;

char $*$p$,$ line $[$MAX$\_$LEN$]$ ;

while $($fgets$($line$,$ MAX$\_$LEN, stdin$))\{$

len $=$ strlen$($line$)$;

if $($nlines s$=$ MAX$\_$LINES $||$ malloc$($len $+1$Hi$,$

I$\text{'}$m working on a C program that reads multiple lines of input, searches for a pattern provided via command$-$line arguments, and supports several flags to modify the output. However, I$\text{'}$m encountering issues with two specific flags:

$-$s Flag $($Sorting$)$: When using the $-$s flag to sort the lines alphabetically, the program outputs duplicate lines and sometimes causes a segmentation fault.

$-$p Flag $($Partial Print$)$: The $-$p flag should print lines containing the pattern in a shortened format with ellipses. However, the output is not as expected and doesn't handle ellipses correctly.

Below is the relevant code for handling these flags. Could you please help me identify and fix the issues?

Issues:

Segmentation Fault with $-$s Flag:

When using the $-$s flag, the program outputs duplicate lines and sometimes causes a segmentation fault.

Partial Print with $-$p Flag:

The $-$p flag should print lines containing the pattern in a shortened format with ellipses. However, the output is not as expected and doesn't handle ellipses correctly.

Example Outputs:

Command: $./$find $-$s in $$ input.txt

Input:

I$$m very interested in Computer Science

This is a test statement

I$$m in

In$-$N$-$Out has great burgers in fact

Last sentence In

Expected Output:

I$$m in

I$$m very interested in Computer Science

In$-$N$-$Out has great burgers in fact

Command: $./$find $-$p in $$ input.txt

Expected Output:

I$$m very...in$...$ience

I$$m in

In$-$N$-$Out h$...$in$...$ fact