Cours/03-Scripting/backup.sh

+#!/bin/bash
+
+function copy {
+    echo "Copie de $1"
+    cp $1 $2
+    if [ $? -ne 0 ]; then
+        echo "Failed copying $1 to $2" >&2
+        exit 5
+    fi
+    name=$(basename $1)
+    f=$2/$name
+    chmod 440 $f
+    if [ $? -ne 0 ]; then
+        echo "Failed chaning $f permissions" >&2
+        exit 6
+    fi
+}
+
+if [ $# -ne  2 ]; then
+    name=$(basename $0)
+    echo "Usage: $name src dest" >&2
+    echo "src    source directory containing txt and dat files" >&2
+    echo "dst    destination directory" >&2
+    exit 1
+fi
+
+if [ ! -d $1 ]; then
+    echo "source directory not found or not a directory!" >&2
+    exit 2
+fi
+
+DATA=$1
+BACKUP=$2
+
+# Si repertoire existe
+if [ -d $BACKUP ]; then
+    # Efface les anciens backups
+    rm -f $BACKUP/*
+    if [ $? -ne 0 ]; then
+        echo "Failed removing files" >&2
+        exit 3
+    fi
+else
+    # Cree repertoire
+    mkdir -p $BACKUP
+    if [ $? -ne 0 ]; then
+        echo "Failed creating $BACKUP directory" >&2
+        exit 4
+    fi
+fi
+
+# Backup les fichiers .txt et .dat
+for f in $DATA/*.txt $DATA/*.dat; do
+    copy $f $BACKUP # appel à la fonction
+done
+
+exit 0

Cours/03-Scripting/exercices/correction/serie1/convimg

+#/bin/bash
+
+THUMB_SIZE=64x64
+THUMB_EXT=png
+
+if [ $# -ne 2 ]; then
+    name=$(basename $0)
+    echo "Usage: $name <input dir> <output dir>" >&2
+    exit 1
+fi
+
+function filetype {
+    file --mime-type "$1" | cut -d':' -f2 | cut -d'/' -f1 | tr -d ' '
+    # alternative plus simple:
+    #file --mime-type "$1" | cut -d' ' -f2 | cut -d'/' -f1
+}
+
+for f in "$1"/*; do
+    if [ $(filetype "$f") == "image" ]; then
+        basefile=$(basename "$f")
+        convert -thumbnail $THUMB_SIZE "$f" "$2/$basefile.$THUMB_EXT"
+    fi
+done

Cours/03-Scripting/exercices/correction/serie1/sigproc

+#!/bin/bash
+if [ "$#" -ne 2 ]; then
+    name=$(basename $0)
+    echo "Usage: $name <utilisateur> <signal>" >&2
+else
+    # tail +2 = affiche à partir de la 2ème ligne de l'entrée
+    kill -$2 $(ps -o pid -u "$1" | tail -n +2)
+    # Alternative:
+    #kill -$2 $(ps -o pid= -u "$1")
+fi

Cours/03-Scripting/exercices/correction/serie2/getbig

+#!/usr/bin/env bash
+
+# Notes:
+# - en utilisant la récursivité
+# - introduce stat command
+# - do not compute size of folders
+# - maange empty directories
+# - hidden files should be ignored
+
+# Get the size of a link given as parameter
+function getsize {
+    stat "$1" | grep Size | cut -c9- | cut -d' ' -f1
+}
+
+# a folder is given as the unique parameter
+# finds the biggest file in this folder
+function findbig {
+    BIGSIZE=0
+
+    # If folder is empty skip it
+    CONTENT=$(ls "$1")
+    if [ -d "$1" -a -n "$CONTENT" ]; then
+
+        # For each file in the folder
+        for f in "$1"/*; do
+            # If directory find the biggest file of this directory
+            if [ -d "$f" ]; then
+                NEWSIZE=0
+                NEWFILE=$(findbig "$f")
+                if [ -n "$NEWFILE" ]; then
+                    NEWSIZE=$(getsize "$NEWFILE")
+                fi
+            # If file find the size of this file
+            else
+                NEWSIZE=$(getsize "$f")
+                NEWFILE="$f"
+            fi
+
+            # Update biggest size and file
+            if [ $NEWSIZE -gt $BIGSIZE ]; then
+                BIGFILE="$NEWFILE"
+                BIGSIZE=$NEWSIZE
+            fi
+        done
+        echo "$BIGFILE"  # return the name of the biggest file
+    fi
+}
+
+# Print usage if number / type of argument is incorrect
+if [ $# -ne 1 -o ! -d $1 ];then
+    echo "Number of argument is incorrect or parameter is not a folder" >&2
+    echo "Usage:" >&2
+    echo -e "\t$(basename $0) folder" >&2
+    exit 1
+fi
+
+# Find the biggest file and recomptue its size for display
+BIGFILE=$(findbig "$1")
+if [ -n "$BIGFILE" ]; then
+    BIGSIZE=$(getsize $BIGFILE)
+    echo -e "$BIGFILE: $BIGSIZE"
+fi
\ No newline at end of file

Cours/03-Scripting/exercices/correction/serie2/getgroups

+#!/usr/bin/env bash
+
+# A few comments:
+# - carefull that users can have the same group name than user name
+# - what happens if program is used without an argument
+# - what happens if program is used with a non existing username
+
+
+# Returns the GID of the username given in the first parameter
+function getusergid {
+    grep "^$1:" /etc/passwd | cut -d':' -f4
+}
+
+# Returns the groupname of the corresponding GID given in first parameter
+function getgroupbygid {
+    grep "^.*:x:$1" /etc/group | cut -d':' -f1
+}
+
+# Retuns the main group of a username given in parameter
+function getusergroup {
+    GID=$(getusergid $1)
+    if [ -n "$GID" ]; then
+        getgroupbygid $GID
+    fi
+}
+
+# Return all additional group names for the username given in the first parameter
+function getusergroups {
+    grep -E "(:|,)$1(,|\$|\s)" /etc/group | cut -d':' -f1
+}
+
+USER=$1
+if [ -z "$USER" ]; then
+    echo "Usage:" >&2
+    echo -e "\t$(basename $0) username" >&2
+    exit 1
+fi
+
+MGROUP=$(getusergroup $USER)
+AGROUP=$(getusergroups $USER)
+
+if [ -n "$MGROUP" -o -n "$AGROUP" ]; then
+    for G in $MGROUP $AGROUP; do
+        echo -n "$G "
+    done
+    echo ""
+fi
\ No newline at end of file

Cours/03-Scripting/exercices/serie2-test-files/group

+root:x:0:brltty,root
+bin:x:1:root,bin,daemon
+daemon:x:2:root,bin,daemon
+sys:x:3:root,bin
+adm:x:4:root,daemon
+tty:x:5:brltty
+disk:x:6:root
+lp:x:7:cups,daemon,chanel
+mem:x:8:
+kmem:x:9:
+wheel:x:10:root,chanel
+ftp:x:11:
+mail:x:12:
+uucp:x:14:brltty,chanel
+log:x:19:root
+utmp:x:20:
+locate:x:21:
+rfkill:x:24:
+smmsp:x:25:
+proc:x:26:polkitd
+http:x:33:
+games:x:50:
+lock:x:54:
+uuidd:x:68:
+dbus:x:81:
+network:x:90:
+video:x:91:
+audio:x:92:brltty
+optical:x:93:
+floppy:x:94:
+storage:x:95:
+scanner:x:96:
+input:x:97:brltty
+power:x:98:
+nobody:x:99:
+users:x:100:
+systemd-journal:x:190:
+systemd-journal-gateway:x:191:
+systemd-timesync:x:192:
+systemd-network:x:193:
+systemd-bus-proxy:x:194:
+systemd-resolve:x:195:
+systemd-journal-upload:x:999:
+systemd-coredump:x:997:
+systemd-journal-remote:x:998:
+polkitd:x:102:
+chanel:x:1000:
+git:x:996:
+avahi:x:84:
+rtkit:x:133:
+colord:x:124:
+gdm:x:120:
+usbmux:x:140:
+brlapi:x:995:brltty
+vboxusers:x:108:chanel,root
+rpc:x:32:
+mysql:x:89:
+kvm:x:994:
+mmi:x:1010:chanel,chanel-unige
+render:x:993:
+cups:x:209:
+chanel-unige:x:1154:
+docker:x:992:chanel
+geoclue:x:991:
+flatpak:x:990:
+adbusers:x:989:
+lxdm:x:988:
+exim:x:79:
+postdrop:x:75:
+nvidia-persistenced:x:143:
+dhcpcd:x:987:
+named:x:40:
+tor:x:43:
+mailpile:x:986:mailpile
+rainloop:x:985:
+gitlab-runner:x:107:
+tox-bootstrapd:x:199:
+brltty:x:984:
+x2gouser:x:111:
+x2goprint:x:112:
+sgx:x:983:
+systemd-oom:x:982:chanel

Cours/03-Scripting/exercices/serie2-test-files/passwd

+root:x:0:0:root:/root:/bin/bash
+bin:x:1:1:bin:/bin:/usr/bin/nologin
+daemon:x:2:2:daemon:/:/usr/bin/nologin
+mail:x:8:12:mail:/var/spool/mail:/usr/bin/nologin
+ftp:x:14:11:ftp:/srv/ftp:/usr/bin/nologin
+http:x:33:33:http:/srv/http:/usr/bin/nologin
+uuidd:x:68:68:uuidd:/:/usr/bin/nologin
+dbus:x:81:81:dbus:/:/usr/bin/nologin
+nobody:x:99:99:nobody:/:/usr/bin/nologin
+systemd-journal-gateway:x:191:191:systemd-journal-gateway:/:/usr/bin/nologin
+systemd-timesync:x:192:192:systemd-timesync:/:/usr/bin/nologin
+systemd-network:x:193:193:systemd-network:/:/usr/bin/nologin
+systemd-bus-proxy:x:194:194:systemd-bus-proxy:/:/usr/bin/nologin
+systemd-resolve:x:195:195:systemd-resolve:/:/usr/bin/nologin
+systemd-journal-upload:x:999:999:systemd Journal Upload:/:/sbin/nologin
+systemd-coredump:x:997:997:systemd Core Dumper:/:/sbin/nologin
+systemd-journal-remote:x:998:998:systemd Journal Remote:/:/sbin/nologin
+polkitd:x:102:102:Policy Kit Daemon:/:/usr/bin/nologin
+chanel:x:1000:1000::/home/chanel:/usr/bin/fish
+git:x:996:996:git daemon user:/:/bin/bash
+avahi:x:84:84:avahi:/:/bin/nologin
+rtkit:x:133:133:RealtimeKit:/proc:/bin/false
+colord:x:124:124::/var/lib/colord:/bin/false
+gdm:x:120:120:Gnome Display Manager:/var/lib/gdm:/sbin/nologin
+usbmux:x:140:140:usbmux user:/:/sbin/nologin
+rpc:x:32:32:Rpcbind Daemon:/dev/null:/bin/false
+mysql:x:89:89:MariaDB:/var/lib/mysql:/sbin/nologin
+cups:x:209:209:cups helper user:/:/sbin/nologin
+chanel-unige:x:1154:1154::/tmp:/usr/bin/fish
+geoclue:x:991:991:Geoinformation service:/var/lib/geoclue:/sbin/nologin
+flatpak:x:990:990:Flatpak system helper:/:/sbin/nologin
+lxdm:x:988:988:Lightweight X11 Display Manager:/var/lib/lxdm:/usr/bin/nologin
+exim:x:79:79:Exim MTA:/var/spool/exim:/usr/bin/nologin
+nvidia-persistenced:x:143:143:NVIDIA Persistence Daemon:/:/usr/bin/nologin
+dhcpcd:x:987:987:dhcpcd privilege separation:/var/lib/dhcpcd:/usr/bin/nologin
+named:x:40:40:BIND DNS Server:/:/usr/bin/nologin
+tor:x:43:43::/var/lib/tor:/usr/bin/nologin
+mailpile:x:986:986:mailpile daemon user:/var/lib/mailpile:/bin/bash
+rainloop:x:985:985:RainLoop User:/var/lib/rainloop:/usr/bin/nologin
+gitlab-runner:x:107:107:GitLab Runner:/var/lib/gitlab-runner:/usr/bin/nologin
+tox-bootstrapd:x:199:199:Tox bootstrapd:/:/usr/bin/nologin
+brltty:x:984:984:Braille Device Daemon:/var/lib/brltty:/usr/bin/nologin
+x2gouser:x:111:111:x2gouser:/var/lib/x2go:/usr/bin/nologin
+x2goprint:x:112:112:x2goprint:/var/spool/x2go:/usr/bin/nologin
+systemd-oom:x:982:982:systemd Userspace OOM Killer:/:/usr/bin/nologin

Cours/03-Scripting/exercices/serie2-test-files/test/subtest/bigest.txt

+ Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+  Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+   Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+    Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+     Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+      Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+       Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+        Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+        v
+        v
+         Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+         v Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+          Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+          v
+           Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+            Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+             Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+              Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+               Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+               v
+                Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+                 Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+                  Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+                   Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+                   
+                    Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+                     Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is.... Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+                      Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+                       Woaw this is clearly the biggest file with all its content which is sooooo big. Incredible, how big it is....
+                       

Cours/03-Scripting/exercices/serie2-test-files/test/subtest/subsubtest/hop.txt

+hop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hophop hop

Cours/03-Scripting/exercices/serie2-test-files/test/subtest/subsubtest/hp2.txt

+hphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphphp

Cours/03-Scripting/exercices/serie2-test-files/test/subtest2/file1.txt

+This is a file

Cours/03-Scripting/exercices/serie2-test-files/test/subtest2/file2.txt

+ This is a fileThis is a fileThis is a fileThis is a fileThis is a fileThis is a fileThis is a fileThis is a fileThis is a fileThis is a fileThis is a fileThis is a file

Cours/03-Scripting/exercices/serie2-test-files/test/top.txt

+top top top top top top top top top top top top top top top top top top top top top top top top top top top top top top top top top top top top