README.md

@@ -1,3 +1,4 @@
 # Ahurac dotfiles
 
 [![Please don't upload to GitHub](https://nogithub.codeberg.page/badge.svg)](https://nogithub.codeberg.page)
+

bin/qemush

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+#!/bin/bash
+
+exec_as() {
+    local user
+    user="$1"
+    shift
+
+    if [ "$(whoami)" != "$user" ]; then
+        exec sudo -u "$user" "$0" "$@"
+    else
+        cd || exit
+    fi
+}
+
+exec_as qemu "$@"
+
+bin=bin
+images=images
+if [ -t 1 ]; then
+    cat=src-hilite-lesspipe.sh
+else
+    cat='cat'
+fi
+PATH="./${bin}:${PATH}"
+EDITOR="${EDITOR:-nvim}"
+alias ls='ls --color=auto'
+alias exec='exec '
+shopt -s expand_aliases
+umask 027
+
+perror() {
+    >&2 printf '\033[1;31mERROR:\033[0m \033[1m%s\033[0m\n' "$*"
+}
+
+public_help() {
+    local name
+    name="$(basename "$0")"
+    exec cat << EOF
+${name}: usage:
+  ${name} active                      - (default behaviour) list active VMs
+  ${name} start <VM name>             - start a VM
+  ${name} watch <VM name>             - attach VM screen session
+  ${name} ls                          - list available VMs
+  ${name} edit <VM name>              - edit VM launching script
+  ${name} rm <VM name>                - delete launch script
+  ${name} diskls                      - list available disk images
+  ${name} diskadd <disk name> <size>  - create a disk image
+  ${name} diskrm <disk name>          - delete disk image
+  ${name} shell                       - start a shell as user qemu
+  ${name} help                        - show this help
+EOF
+}
+
+error_usage() {
+    perror "Invalid usage"
+    >&2 public_help
+    return 1
+}
+
+public_start() {
+    local vm_name="$1"
+    shift
+
+    exec screen -S "$vm_name" "$vm_name" "$@"
+}
+
+public_watch() {
+    exec screen -dr "$1"
+}
+
+public_active() {
+    exec screen -ls
+}
+
+public_ls() {
+    echo "Available machines:"
+    exec ls "$bin"
+}
+
+diskpath() {
+    printf "%s.qcow2" "${images}/${1}"
+}
+
+public_diskadd() {
+    exec qemu-img create -f qcow2 "$(diskpath "$1")" "$2"
+}
+
+public_diskrm() {
+    exec rm -vi -- "$(diskpath "$1")"
+}
+
+public_diskls() {
+    echo "Available disks:"
+    exec ls "$images"
+}
+
+public_edit() {
+    local file="${bin}/${1}"
+    "$EDITOR" "$file"
+    exec chmod u+x "$file"
+}
+
+public_rm() {
+    exec rm -vi -- "${bin}/${1}"
+}
+
+public_shell() {
+    exec bash -i
+}
+
+public_cat() {
+    exec "$cat" "${bin}/${1}"
+}
+
+function="$1"
+shift
+
+if [ -z "$function" ]; then
+    public_active
+elif declare -F | cut -d \  -f 3- | grep '^public_' | sed 's/^public_//' | grep -q "^${function}$"; then
+    "public_${function}" "$@"
+else
+    error_usage
+fi

home/gitconfig

@@ -1,6 +1,6 @@
 [user]
-	name = Ahurac
+	name = Hippolyte Chauvin
-	email = ahurac@mailbox.org
+	email = hchauvin38@outlook.fr
 [core]
 	editor = nvim
 [init]

qemu/bin/linux

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+#!/bin/sh -x
+qemu-system-x86_64 \
+	-enable-kvm \
+	-M q35 \
+	-cpu host -smp "$(("$(nproc)" / 2))" \
+	-m "$(("$(free | awk '($1 == "Mem:") { print $2 }')" / 2))K" \
+	-net nic \
+	"$@"

qemu/bin/linux-spice

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+#!/bin/sh -x
+exec linux \
+	-vga qxl \
+	-device virtio-serial \
+	-chardev spicevmc,id=vdagent,debug=0,name=vdagent \
+	-device virtserialport,chardev=vdagent,name=com.redhat.spice.0 \
+	-spice port="$(first-free-port 5900)",addr=127.0.0.1,disable-ticketing=on \
+	"$@"

qemu/bin/redox

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+#!/bin/sh -x
+exec qemu-system-x86_64 \
+	-enable-kvm \
+	-M q35 \
+	-cpu host -smp "$(("$(nproc)" / 2))" \
+	-m "$(("$(free | grep '^Mem:\s' | awk '{ print $NF }')" / 2))K" \
+	-device e1000,netdev=net0 \
+	-device nec-usb-xhci,id=xhci \
+	-device ich9-intel-hda -device hda-duplex \
+	"$@"

qemu/bin/redox-spice

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+#!/bin/sh -x
+exec redox \
+	-vga qxl -spice port="$(first-free-port 5900)",addr=127.0.0.1,disable-ticketing=on \
+	"$@"

qemu/bin/windows

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+#!/bin/sh -x
+qemu-system-x86_64 \
+	-enable-kvm \
+	-cpu host -smp "$(("$(nproc)" / 2))" \
+	-m "$(("$(free | grep '^Mem: ' | awk '{ print $NF }')" / 2))K" \
+	-net nic \
+	-device virtio-serial \
+	-usbdevice tablet \
+	"$@"

qemu/bin/windows-spice

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+#!/bin/sh -x
+exec windows \
+	-vga qxl \
+	-spice port="$(first-free-port 5900)",addr=127.0.0.1,disable-ticketing=on \
+	-chardev spicevmc,id=vdagent,name=vdagent \
+	-device virtserialport,chardev=vdagent,name=com.redhat.spice.0 \
+	"$@"

src/first-free-port.c

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+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <sysexits.h>
+#include <string.h>
+
+#define MIN_TCP_PORT 1
+#define TCP_TABLE "/proc/net/tcp"
+#define TCP_TABLE_LINE_LENGTH 151
+#define LOCALHOST_HEX "0100007F"
+#define WILDCARD_HEX "00000000"
+#define LISTENING_HEX "0A"
+#define PORTS_BLOCKS_TO_ALLOW 4
+
+/**
+ * Get all the listening TCP ports
+ */
+static unsigned short *get_listening_ports(unsigned short *listening_ports, FILE *tcp_table_fptr) {
+    char line[TCP_TABLE_LINE_LENGTH];
+    char delimiter[] = " ";
+    unsigned short len = 0;
+    char *address;
+    char *state;
+    char *field;
+    size_t allowed_for_ports = PORTS_BLOCKS_TO_ALLOW;
+
+    // Skip first line (header)
+    fgets(line, sizeof(line), tcp_table_fptr);
+
+    // Tokenize lines one by one
+    while (fgets(line, sizeof(line), tcp_table_fptr) != NULL) {
+        strtok(line, delimiter);
+
+        address = strtok(NULL, delimiter);
+        strtok(NULL, delimiter);
+        state = strtok(NULL, delimiter);
+        field = strtok(NULL, delimiter);
+        
+        while (field != NULL) {
+            field = strtok(NULL, delimiter);
+        }
+
+        if ((!strncmp(address, LOCALHOST_HEX, 8) || !strncmp(address, WILDCARD_HEX, 8)) && !strncmp(state, LISTENING_HEX, 2)) {
+            if (len == allowed_for_ports) {
+                allowed_for_ports = allowed_for_ports + PORTS_BLOCKS_TO_ALLOW;
+                listening_ports = realloc(listening_ports, allowed_for_ports * sizeof(unsigned short));
+            }
+            listening_ports[len] = strtol(address + strlen(address) - 4, NULL, 16);
+            len++;
+        }
+    }
+
+    if (len == allowed_for_ports) {
+        allowed_for_ports = allowed_for_ports + PORTS_BLOCKS_TO_ALLOW;
+        listening_ports = realloc(listening_ports, allowed_for_ports * sizeof(unsigned short));
+    }
+    listening_ports[len] = 0;
+
+    return listening_ports;
+}
+
+static unsigned char is_port_available(const unsigned short port, const unsigned short *listening_ports) {
+    unsigned short i = 0;
+    while (listening_ports[i] != 0 && listening_ports[i] != port) {
+        i++;
+    }
+    return listening_ports[i] == 0;
+}
+
+static inline unsigned char is_valid_tcp_port(const unsigned short tcp_port) {
+    return tcp_port >= MIN_TCP_PORT;
+}
+
+int main(int argc, char *argv[]) {
+    unsigned short current_port;
+
+    if (argc >= 2) {
+        current_port = atoi(argv[1]);
+    } else {
+        current_port = 0;
+    }
+
+    if (!is_valid_tcp_port(current_port)) {
+        fprintf(stderr, "Provide a valid TCP port number as first argument.\n");
+        return EX_USAGE;
+    }
+
+    // Open TCP table
+    FILE *tcp_table_fptr = fopen(TCP_TABLE, "r");
+    if (tcp_table_fptr == NULL) {
+        fprintf(stderr, "Error opening the TCP table.\n");
+        return EX_OSFILE;
+    }
+
+    unsigned short *listening_ports = malloc(PORTS_BLOCKS_TO_ALLOW * sizeof(unsigned short));
+    listening_ports = get_listening_ports(listening_ports, tcp_table_fptr);
+
+    // Check if the current port is available, add
+    while (!is_port_available(current_port, listening_ports)) {
+        current_port++;
+    }
+
+    free(listening_ports);
+
+    if (is_valid_tcp_port(current_port)) {
+        printf("%d\n", current_port);
+        return EXIT_SUCCESS;
+    } else {
+        fprintf(stderr, "No more ports available. How did you fuck up that bad ???\n");
+        return EX_TEMPFAIL;
+    }
+}