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/ex02/ex02.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/ex03.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+if [ "$#" -ne 4 ]; then
+    echo "Usage: $0 filename keyword1 keyword2 keyword3"
+    exit 1
+fi
+
+filename=$1
+keyword1=$2
+keyword2=$3
+keyword3=$4
+
+if [ ! -f "$filename" ]; then
+    echo "File '$filename' not found!"
+    exit 1
+fi
+
+
+search_keyword() {
+    local keyword=$1
+    echo "Keyword: $keyword"
+    count=$(grep -c "$keyword" "$filename")
+    echo "Number of matches: $count"
+    grep -n "$keyword" "$filename" || true
+    echo
+}
+
+search_keyword "$keyword1"
+search_keyword "$keyword2"
+search_keyword "$keyword3"

courses/bash/ex04/ex04.sh

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

courses/bash/ex05/ex05.sh

@@ -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/ex06.sh

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

courses/bash/ex09/ex09.sh

@@ -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/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;
+}