brscan4: init at 0.4.3-3
A sane backend for recent brother scanners. Depends on the presence of etc files generated by the nixos module of the same name. Supports network scanner specification through the nixos module.
This commit is contained in:
Raymond Gauthier
@@ -0,0 +1,97 @@
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{ stdenv, fetchurl, callPackage, patchelf, makeWrapper, coreutils, libusb }:
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/*
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*/
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let
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myPatchElf = file: with stdenv.lib; ''
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patchelf --set-interpreter \
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${stdenv.glibc}/lib/ld-linux${optionalString stdenv.is64bit "-x86-64"}.so.2 \
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${file}
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'';
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udevRules = callPackage ./udev_rules_type1.nix {};
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in
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stdenv.mkDerivation rec {
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name = "brscan4-0.4.3-3";
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src = fetchurl {
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url = "http://download.brother.com/welcome/dlf006645/${name}.amd64.deb";
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sha256 = "1nccyjl0b195pn6ya4q0zijb075q8r31v9z9a0hfzipfyvcj57n2";
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};
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unpackPhase = ''
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ar x $src
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tar xfvz data.tar.gz
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'';
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nativeBuildInputs = [ makeWrapper patchelf coreutils udevRules ];
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buildInputs = [ libusb ];
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buildPhase = ":";
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patchPhase = ''
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${myPatchElf "opt/brother/scanner/brscan4/brsaneconfig4"}
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RPATH=${libusb}/lib
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for a in usr/lib64/sane/*.so*; do
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if ! test -L $a; then
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patchelf --set-rpath $RPATH $a
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fi
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done
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'';
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installPhase = ''
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PATH_TO_BRSCAN4="opt/brother/scanner/brscan4"
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mkdir -p $out/$PATH_TO_BRSCAN4
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cp -rp $PATH_TO_BRSCAN4/* $out/$PATH_TO_BRSCAN4
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mkdir -p $out/lib/sane
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cp -rp usr/lib64/sane/* $out/lib/sane
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# Symbolic links were absolute. Fix them so that they point to $out.
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pushd "$out/lib/sane" > /dev/null
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for a in *.so*; do
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if test -L $a; then
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fixedTargetFileName="$(basename $(readlink $a))"
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unlink "$a"
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ln -s -T "$fixedTargetFileName" "$a"
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fi
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done
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popd > /dev/null
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# Generate an LD_PRELOAD wrapper to redirect execvp(), open() and open64()
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# calls to `/opt/brother/scanner/brscan4`.
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preload=$out/libexec/brother/scanner/brscan4/libpreload.so
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mkdir -p $(dirname $preload)
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gcc -shared ${./preload.c} -o $preload -ldl -DOUT=\"$out\" -fPIC
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makeWrapper \
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"$out/$PATH_TO_BRSCAN4/brsaneconfig4" \
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"$out/bin/brsaneconfig4" \
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--set LD_PRELOAD $preload
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mkdir -p $out/etc/sane.d
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echo "brother4" > $out/etc/sane.d/dll.conf
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mkdir -p $out/etc/udev/rules.d
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cp -p ${udevRules}/etc/udev/rules.d/*.rules \
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$out/etc/udev/rules.d
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'';
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dontStrip = true;
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dontPatchELF = true;
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meta = {
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description = "Brother brscan4 sane backend driver";
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homepage = http://www.brother.com;
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platforms = stdenv.lib.platforms.linux;
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license = stdenv.lib.licenses.unfree;
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maintainers = with stdenv.lib.maintainers; [ jraygauthier ];
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};
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}
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@@ -0,0 +1,170 @@
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/* Brgen4 search for configuration under `/etc/opt/brother/scanner/brscan4`. This
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LD_PRELOAD library intercepts execvp(), open and open64 calls to redirect them to
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the corresponding location in $out. Also support specifying an alternate
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file name for `brsanenetdevice4.cfg` which otherwise is invariable
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created at `/etc/opt/brother/scanner/brscan4`*/
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <dlfcn.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <string.h>
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#include <dirent.h>
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char origDir [] = "/etc/opt/brother/scanner/brscan4";
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char realDir [] = OUT "/opt/brother/scanner/brscan4";
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char devCfgFileNameEnvVar [] = "BRSANENETDEVICE4_CFG_FILENAME";
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char devCfgFileName [] = "/etc/opt/brother/scanner/brscan4//brsanenetdevice4.cfg";
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const char * rewrite(const char * path, char * buf)
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{
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if (strncmp(path, devCfgFileName, sizeof(devCfgFileName)) == 0) {
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const char* newCfgFileName = getenv(devCfgFileNameEnvVar);
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if (!newCfgFileName) return path;
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if (snprintf(buf, PATH_MAX, "%s", newCfgFileName) >= PATH_MAX)
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abort();
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return buf;
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}
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if (strncmp(path, origDir, sizeof(origDir) - 1) != 0) return path;
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if (snprintf(buf, PATH_MAX, "%s%s", realDir, path + sizeof(origDir) - 1) >= PATH_MAX)
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abort();
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return buf;
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}
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const char* findAndReplaceFirstOccurence(const char* inStr, const char* subStr,
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const char* replaceStr,
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char* buf, unsigned maxBuf)
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{
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const char* foundStr = strstr(inStr, subStr);
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if (!foundStr)
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return inStr;
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const unsigned inStrLen = strlen(inStr);
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const unsigned subStrLen = strlen(subStr);
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const unsigned replaceStrLen = strlen(replaceStr);
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const unsigned precedingStrLen = foundStr - inStr;
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if (precedingStrLen + 1 > maxBuf)
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return NULL;
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const unsigned followingStrPos = precedingStrLen + subStrLen;
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const unsigned followingStrLen = inStrLen - followingStrPos;
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strncpy(buf, inStr, precedingStrLen);
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unsigned outLength = precedingStrLen;
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if (outLength + replaceStrLen + 1 > maxBuf)
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return NULL;
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strncpy(buf + outLength, replaceStr, replaceStrLen);
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outLength += replaceStrLen;
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if (outLength + followingStrLen + 1 > maxBuf)
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return NULL;
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strncpy(buf + outLength, inStr + followingStrPos, followingStrLen);
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outLength += followingStrLen;
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buf[outLength] = '\0';
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return buf;
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}
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const char* rewriteSystemCall(const char* command, char* buf, unsigned maxBuf)
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{
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const char* foundStr = strstr(command, devCfgFileName);
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if (!foundStr)
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return command;
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const char* replaceStr = getenv(devCfgFileNameEnvVar);
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if (!replaceStr) return command;
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const char* result =
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findAndReplaceFirstOccurence(command, devCfgFileName, replaceStr, buf, maxBuf);
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if (!result)
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abort();
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return result;
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}
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int execvp(const char * path, char * const argv[])
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{
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int (*_execvp) (const char *, char * const argv[]) = dlsym(RTLD_NEXT, "execvp");
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char buf[PATH_MAX];
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return _execvp(rewrite(path, buf), argv);
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}
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int open(const char *path, int flags, ...)
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{
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char buf[PATH_MAX];
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int (*_open) (const char *, int, mode_t) = dlsym(RTLD_NEXT, "open");
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mode_t mode = 0;
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if (flags & O_CREAT) {
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va_list ap;
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va_start(ap, flags);
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mode = va_arg(ap, mode_t);
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va_end(ap);
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}
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return _open(rewrite(path, buf), flags, mode);
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}
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int open64(const char *path, int flags, ...)
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{
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char buf[PATH_MAX];
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int (*_open64) (const char *, int, mode_t) = dlsym(RTLD_NEXT, "open64");
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mode_t mode = 0;
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if (flags & O_CREAT) {
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va_list ap;
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va_start(ap, flags);
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mode = va_arg(ap, mode_t);
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va_end(ap);
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}
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return _open64(rewrite(path, buf), flags, mode);
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}
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FILE* fopen(const char* path, const char* mode)
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{
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char buf[PATH_MAX];
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FILE* (*_fopen) (const char*, const char*) = dlsym(RTLD_NEXT, "fopen");
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return _fopen(rewrite(path, buf), mode);
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}
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FILE *fopen64(const char *path, const char *mode)
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{
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char buf[PATH_MAX];
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FILE* (*_fopen64) (const char*, const char*) = dlsym(RTLD_NEXT, "fopen64");
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return _fopen64(rewrite(path, buf), mode);
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}
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DIR* opendir(const char* path)
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{
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char buf[PATH_MAX];
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DIR* (*_opendir) (const char*) = dlsym(RTLD_NEXT, "opendir");
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return _opendir(rewrite(path, buf));
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}
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#define SYSTEM_CMD_MAX 512
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int system(const char *command)
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{
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char buf[SYSTEM_CMD_MAX];
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int (*_system) (const char*) = dlsym(RTLD_NEXT, "system");
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const char* newCommand = rewriteSystemCall(command, buf, SYSTEM_CMD_MAX);
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return _system(newCommand);
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}
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@@ -0,0 +1,60 @@
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{ stdenv, fetchurl, libsaneUDevRuleNumber ? "49"}:
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stdenv.mkDerivation rec {
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name = "brother-udev-rule-type1-1.0.0-1";
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src = fetchurl {
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url = "http://download.brother.com/welcome/dlf006654/${name}.all.deb";
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sha256 = "0i0x5jw135pli4jl9mgnr5n2rrdvml57nw84yq2999r4frza53xi";
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};
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buildInputs = [ ];
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unpackPhase = ''
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ar x $src
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tar xfvz data.tar.gz
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'';
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/*
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Fix the following error:
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~~~
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invalid rule 49-brother-libsane-type1.rules
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unknown key 'SYSFS{idVendor}'
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~~~
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Apparently the udev rules syntax has change and the SYSFS key has to
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be changed to ATTR.
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See:
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- <http://ubuntuforums.org/showthread.php?t=1496878>
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- <http://www.planet-libre.org/index.php?post_id=10937>
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*/
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patchPhase = ''
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sed -i -e s/SYSFS/ATTR/g opt/brother/scanner/udev-rules/type1/*.rules
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'';
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buildPhase = ":";
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installPhase = ''
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mkdir -p $out/etc/udev/rules.d
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cp opt/brother/scanner/udev-rules/type1/NN-brother-mfp-type1.rules \
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$out/etc/udev/rules.d/${libsaneUDevRuleNumber}-brother-libsane-type1.rules
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chmod 644 $out/etc/udev/rules.d/${libsaneUDevRuleNumber}-brother-libsane-type1.rules
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'';
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dontStrip = true;
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dontPatchELF = true;
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meta = {
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description = "Brother type1 scanners udev rules";
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homepage = http://www.brother.com;
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platforms = stdenv.lib.platforms.linux;
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license = stdenv.lib.licenses.unfree;
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maintainers = with stdenv.lib.maintainers; [ jraygauthier ];
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};
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}
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