Kirill

courses/bash/ex02/ex01.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+if [ "$#" -ne 1 ]; then
+ echo "Usage: $0 'pattern'"
+ exit 1
+fi
+
+pattern=$1
+
+find . -type d | while read -r dir; do
+ # Get the relative path
+ rel_path=${dir#./}
+
+ if echo "$rel_path" | grep -w -q "$pattern"; then
+ echo "$rel_path"
+ fi
+done

courses/bash/ex03/kirill

@@ -0,0 +1,31 @@
+ #!/bin/bash
+
+if [ "$#" -ne 4 ]; then
+ echo "Usage: $0 filename keyword1 keyword2 keyword3" >&2
+ exit 1
+fi
+
+filename=$1
+keyword1=$2
+keyword2=$3
+keyword3=$4
+
+if [ ! -r "$filename" ]; then
+ exit 1
+fi
+
+search_keyword() {
+ local keyword=$1
+ local matches
+ matches=$(grep -c "$keyword" "$filename")
+ echo "Keyword: $keyword"
+ echo "Number of matches: $matches"
+ grep "$keyword" "$filename"
+ echo ""
+}
+
+search_keyword "$keyword1"
+search_keyword "$keyword2"
+search_keyword "$keyword3"
+
+exit 0

courses/bash/ex04/kirill

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+if [ "$#" -ne 1 ]; then
+ echo "Usage: $0 pattern" >&2
+ exit 1
+fi
+
+pattern=$1
+
+find . -type f | while read -r file; do
+
+ grep -Hn "$pattern" "$file"
+done
+
+exit 0

courses/bash/ex05/kirill

@@ -0,0 +1,50 @@
+ #!/bin/bash
+
+if [ "$#" -lt 2 ]; then
+ echo "Usage: $0 {-m|-s|-e|-o} number1 number2 ..." >&2
+ exit 1
+fi
+
+operation=$1
+shift
+
+sum=0
+count=0
+even_sum=0
+odd_sum=0
+
+for number in "$@"; do
+ sum=$(echo "$sum + $number" | bc)
+ count=$((count + 1))
+ if [ $((number % 2)) -eq 0 ]; then
+ even_sum=$(echo "$even_sum + $number" | bc)
+ else
+ odd_sum=$(echo "$odd_sum + $number" | bc)
+ fi
+done
+
+case $operation in
+ -s)
+ echo "Sum: $sum"
+ ;;
+ -e)
+ echo "Sum of even numbers: $even_sum"
+ ;;
+ -o)
+ echo "Sum of odd numbers: $odd_sum"
+ ;;
+ -m)
+ if [ $count -ne 0 ]; then
+ mean=$(echo "scale=2; $sum / $count" | bc)
+ echo "Mean: $mean"
+ else
+ echo "No numbers provided to calculate mean"
+ fi
+ ;;
+ *)
+ echo "Invalid option. Usage: $0 {-m|-s|-e|-o} number1 number2 ..." >&2
+ exit 1
+ ;;
+esac
+
+exit 0

courses/bash/ex06/kirill

@@ -0,0 +1,17 @@
+ #!/bin/bash
+
+map() {
+ if [ "$#" -lt 2 ]; then
+ echo "Usage: map command arg1 arg2 ..."
+ return 1
+ fi
+
+ command=$1
+ shift
+
+ for arg in "$@"; do
+ $command "$arg"
+ done
+}
+
+

courses/bash/ex09/kirill

@@ -0,0 +1,79 @@
+#!/bin/bash
+
+usage() {
+ echo "Usage: $0 [OPTIONS] FILE"
+ echo "Options:"
+ echo " -u, --url Extract URLs from the file"
+ echo " -e, --email Extract emails from the file"
+ echo " -h, --help Display this help and exit"
+}
+
+extract_urls() {
+ grep -oE 'https?://[^\s/$.?#].[^\s]*' "$1"
+}
+
+extract_emails() {
+ grep -oE '[\w._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}' "$1"
+}
+
+options=$(getopt -o ueh --long url,email,help -- "$@")
+if [ $? -ne 0 ]; then
+ usage
+ exit 1
+fi
+
+eval set -- "$options"
+
+url_flag=false
+email_flag=false
+
+while true; do
+ case "$1" in
+ -u | --url)
+ url_flag=true
+ shift
+ ;;
+ -e | --email)
+ email_flag=true
+ shift
+ ;;
+ -h | --help)
+ usage
+ exit 0
+ ;;
+ --)
+ shift
+ break
+ ;;
+ *)
+ usage
+ exit 1
+ ;;
+ esac
+done
+
+ is provided
+if ! $url_flag && ! $email_flag; then
+ echo "Error: You must specify at least one option (--url or --email)."
+ usage
+ exit 1
+fi
+
+
+if [ $# -ne 1 ]; then
+ echo "Error: You must specify a file."
+ usage
+ exit 1
+fi
+
+ file
+file="$1"
+if $url_flag; then
+ echo "Extracting URLs from $file:"
+ extract_urls "$file"
+fi
+
+if $email_flag; then
+ echo "Extracting emails from $file:"
+ extract_emails "$file"
+fi

courses/bash/ex10/kirill

@@ -0,0 +1,13 @@
+#!/bin/bash
+ '
+ BEGIN {
+
+ line_count = 0;
+ }
+ {
+ line_count++;
+ }
+ END {
+ print line_count;
+ }
+' "$@"

courses/cunix/ex01/src/strlen.c

@@ -0,0 +1,15 @@
+#include <stdio.h>
+size_t my_strlen(const char *str) {
+ const char *s = str;
+ while (*s != '\0') {
+ s++;
+ }
+ return s - str;
+}
+
+int main() {
+ const char *my_string = "Hello, World!";
+ size_t length = my_strlen(my_string);
+ printf("Length of the string is %zu\n", length);
+ return 0;
+}