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--- средства_программирования_shell [2022/06/30 15:11]
val [Web сервер на shell]
+++ средства_программирования_shell [2025/03/10 10:06] (current)
val [Передача сообщений в syslog]
@@ Line 4: / Line 4: @@
   * [[http://mywiki.wooledge.org/BashFAQ|Часто задаваемые вопросы про bash (eng)]]
   * [[https://habrahabr.ru/post/335960/|Играючи BASH'им]]
+  * [[https://unix.stackexchange.com/questions/159513/what-are-the-shells-control-and-redirection-operators|What are the shell's control and redirection operators?]]
   * [[https://youtu.be/GxVmukxVUo0|Видео урок]]
@@ Line 11: / Line 12: @@
 ===== Проверка синтаксиса =====
+  * [[https://www.shellcheck.net/wiki/]]
 <code>
 # apt install shellcheck
-$ shellcheck script.sh
+$ shellcheck webd/webd
 </code>
 ===== Переменные окружения =====
@@ Line 76: / Line 80: @@
 ==== Целочисленный цикл (поиск хостов в подсети) ====
+  * [[Утилита nmap#Ping диапазона адресов с verbose и debug]]
 <code>
 $ cat test_ping.sh
@@ Line 81: / Line 88: @@
 #!/bin/sh
-test -z $1 && exit 1
+#test -z $1 && exit 1
+#[ "$1" ] || { echo Example: ./test_ping.sh 10.5.11; exit 1; }
 i=1
@@ Line 87: / Line 95: @@
 do
   test $i = 50 && continue
-  ping -c 1 -W 1 $1.$i > /dev/null 2>&1 && echo $1.$i
+  ping -c 1 -W 1 $1.$i > /dev/null 2>&1 && echo $1.$i || echo No $i
   i=$(($i + 1))
 done
@@ Line 184: / Line 192: @@
 <code>
-$ cat log_gen.sh
+bash -c 'cat <<END >log_gen.sh
-</code><code>
 while :
 do
@@ Line 191: / Line 198: @@
   logger -t cisco -p local0.info "Message 2"
 done
+END'
 </code><code>
-$ sh cisco_log_gen.sh
+$ sh log_gen.sh
 </code>
 ===== Примеры использования скриптов sh в системах загрузки =====
@@ Line 377: / Line 385: @@
 ==== Web сервер на shell ====
+  * [[Сервис HTTP]]
+  * [[Переменные окружения#Чтение значений переменных окружения]]
 <code>
@@ Line 383: / Line 394: @@
 #!/bin/bash
 base=/var/www
-log=/var/log/webd.log
+#log=/var/log/webd.log
 read request
+##echo "$request" >> $log       # for educational demonstration
+filename="${request#GET }"
+filename="${filename% HTTP/*}"
+test $filename = "/" && filename="/index.html"
+filename="$base$filename"
 while :
 do
-  read header
+  read -r header
+##  echo "$header" >> $log       # for educational demonstration
   [ "$header" == $'\r' ] && break;
+##  [ "$header" == $'' ] && break;    # for STDIN/STDOUT educational demonstration
 done
-url="${request#GET }"
-url="${url% HTTP/*}"
-test $url = "/" && url="/index.html"
-filename="$base$url"
 if [ -e "$filename" ]
 then
-  echo `date` OK $url >> $log
+#  echo `date` OK $filename on `hostname` >> $log
   echo -e "HTTP/1.1 200 OK\r"
-  echo -e "Content-Type: `/usr/bin/file -bi \"$filename\"`\r"
+  echo -e "Content-Type: $(/usr/bin/file -bi "$filename")\r"
   echo -e "\r"
   /bin/cat "$filename"
 else
-  echo `date` ERR $url >> $log
+#  echo "$(date)" ERR "$filename" on "$(hostname)" >> "$log"
   echo -e "HTTP/1.1 404 Not Found\r"
   echo -e "Content-Type: text/html;\r"
   echo -e "\r"
-  echo -e "<h1>$url Not Found in container `hostname`</h1>"
+  echo -e "<h1>File $filename Not Found</h1>"
+#  ip=$(awk '/32 host/ { print f } {f=$2}' /proc/net/fib_trie | sort -u | grep -v 127.0.0.1)
+#  echo -e "Host: $(hostname), IP: $ip, ver 1.1"
 fi
 </code>
@@ Line 422: / Line 438: @@
 ==== Ресурсы Web сервера на shell ====
 <code>
-# mkdir /var/www
+# mkdir -p /var/www
 # cat /var/www/index.html
@@ Line 431: / Line 447: @@
 </html>
 </code><code>
-# mkdir /var/www/img
+# mkdir -p /var/www/img
 </code>
@@ Line 438: / Line 454: @@
 </code>
+  * [[Сервис INETD]]
 ==== Проверка ====
@@ Line 447: / Line 464: @@
   * [[Сервис Asterisk#Asterisk AGI]]
+==== Отправка email с вложениями ====
+  * [[https://serverfault.com/questions/38919/send-an-email-with-an-attached-file-using-telnet-or-netcat|Send an email with an attached file using telnet or netcat]]
+<code>
+$ cat mail.sh
+</code><code>
+#!/bin/sh
+[ -f "$1" ] || { echo Example: ./mail.sh attach_file_name; exit 1; }
+EMAIL="val@bmstu.ru"
+MAILSERVER="mailhub.bmstu.ru"
+FILENAME=$1
+{
+    sleep 2;
+    echo "EHLO $MAILSERVER"; sleep 1;
+    echo "MAIL FROM: <$EMAIL>"; sleep 1;
+    echo "RCPT TO: <$EMAIL>"; sleep 1;
+    echo "DATA"; sleep 1;
+    echo "To: $EMAIL"
+    echo "Subject: $FILENAME"
+    echo "MIME-Version: 1.0 (mime-construct 1.9)"
+    echo "Content-Type: $(/usr/bin/file -bi $FILENAME); name=\"$FILENAME\""
+    echo "Content-Transfer-Encoding: base64";
+    echo
+    cat $FILENAME | openssl base64;
+    echo '.';
+    echo "QUIT";
+    echo
+} | nc $MAILSERVER 25
+</code>
 ==== Использование диалоговых окон ====
+<code>
+ansible-pull-gpo# cat start.sh
+</code><code>
+#!/bin/bash
+on_off() {
+        grep -q "$1" "$2" && echo ON || echo OFF
+}
+if [ -z ${BR+x} ]; then echo -e "Variable BR (branch) is not set, specify, for example\nexport BR=master"; exit 1; fi
+apt update || exit 0
+apt install dialog ansible git -y
+GP_OP_FILE=/usr/local/etc/gpo_options.yml
+GP_EX_FILE=/usr/local/bin/ansible-pull-gpo.sh
+TEMP_FILE=$(mktemp -t 'XXXX')
+touch "$GP_OP_FILE"
+dialog  --title "Configurations, Roles and Programs"  --clear --nocancel\
+        --checklist "Choose Options" 19 56 15 \
+        CONF_RUS_INT: "Russian Interface" "$(on_off CONF_RUS_INT "$GP_OP_FILE")" \
+        PROG_THBIRD: "Mail client Thunderbird" "$(on_off PROG_THBIRD "$GP_OP_FILE")" \
+        ROLE_ZAB_AG: "Zabbix Agent" "$(on_off ROLE_ZAB_AG "$GP_OP_FILE")" \
+        ROLE_OVPN1_CL: "OpenVPN Client" "$(on_off ROLE_OVPN1_CL "$GP_OP_FILE")" \
+>"$TEMP_FILE"
+< "$TEMP_FILE" tr " " "\n" > "$GP_OP_FILE"
+rm "$TEMP_FILE"
+echo -e "\nEND:" >> "$GP_OP_FILE"
+echo "/usr/bin/ansible-pull -U http://server.corpX.un/student/ansible-pull-gpo.git -C $BR -e @$GP_OP_FILE" > "$GP_EX_FILE"
+chmod +x "$GP_EX_FILE"
+##exit 0
+echo -e "0 */2 * * * sleep \${RANDOM:0:2}m; $GP_EX_FILE\n@reboot sleep 3m; $GP_EX_FILE" | crontab -
+"$GP_EX_FILE"
+#apt upgrade -y
+#reboot
+</code>
 === Использование программы whiptail (Linux) ===

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