Alpine.mk: better names for the rules.

Makefile

@@ -3,6 +3,8 @@ all:
 DOMAIN ?= karchnu.fr
 get-certificate-info:
 	openssl s_client -connect $(DOMAIN):443
+verify-web-certificate-dates:
+	echo | openssl s_client -connect $(DOMAIN):443 2>/dev/null | openssl x509 -noout -dates
 
 show-connected-ipv4:
 	@# Don't forget the double $$ since we are in a Makefile.
@@ -18,3 +20,6 @@ which-bin-uses-this-port:
 MAIL_DOMAIN ?= mail.karchnu.fr
 verify-mail-certificate:
 	echo | openssl s_client -starttls smtp -showcerts -connect $(MAIL_DOMAIN):587 -servername $(MAIL_DOMAIN) | openssl x509 -noout -dates
+
+verify-mail-imap-certificate:
+	echo | openssl s_client -showcerts -connect $(MAIL_DOMAIN):993 -servername $(MAIL_DOMAIN) | openssl x509 -noout -dates

bash/make-alpine-chroot.sh

@@ -1,51 +1,63 @@
 #!/bin/bash
 
-# TODO: good codebase, need parameters and make a more generic tool
+set -x
 
-APKPKT=apk-tools-static-2.10.1-r0.apk
+# WARNING: this codebase is now updated in the "alpine.mk" makefile.
+# A makefile is a better option than a plain shell script, it enables
+# an automatic selection of the action to perform (by just selecting
+# the "rule" to make), without dedicated code.
 
-mirror=http://uk.alpinelinux.org/alpine/
-MAINREP=/media/fast/al
-CHROOT=$MAINREP/chroot
+#APKPKT=apk-tools-static-2.10.1-r0.apk
+
+#mirror=http://uk.alpinelinux.org/alpine/
+mirror=http://dl-cdn.alpinelinux.org/alpine
+MAIN_DIR=/tmp/root
+CHROOT=$MAIN_DIR/chroot
 PACKAGES="vim zsh"
-POSTPACKAGES="alpine-sdk git openssh openssl openssl-dev crystal"
+#POSTPACKAGES="alpine-sdk git openssh openssl openssl-dev crystal"
+POSTPACKAGES=""
+
+chroot_mkdir(){
+	mkdir -p $CHROOT || true
+}
+
+#chroot_apk_static(){
+#	cd ${MAIN_DIR}/
+#
+#	if [ -f ${APKPKT} ]; then
+#		echo "apk already downloaded"
+#	else
+#		wget ${mirror}/latest-stable/main/`uname -p`/${APKPKT}
+#		tar -xzf ${APKPKT}
+#	fi
+#}
 
 chroot_install(){
-	mkdir -p $CHROOT
-	cd ${MAINREP}/
+	cd ${MAIN_DIR}/
 
-	if [ -f ${APKPKT} ]; then
-		echo "apk already downloaded"
-	else
-		wget ${mirror}/latest-stable/main/`uname -p`/${APKPKT}
-		tar -xzf ${APKPKT}
-	fi
-
-	${MAINREP}/sbin/apk.static -X ${mirror}/latest-stable/main -U --allow-untrusted --root ${CHROOT} --initdb add alpine-base $PACKAGES
+	#${MAIN_DIR}/sbin/apk.static -X ${mirror}/latest-stable/main -U --allow-untrusted --root ${CHROOT} --initdb add alpine-base $PACKAGES
+	apk --arch $(arch) -X ${mirror}/latest-stable/main/ -U --allow-untrusted --root ${CHROOT} --initdb add alpine-base
 	cp /etc/resolv.conf $CHROOT/etc/
-	cp -r ~/.zsh* ~/.vim* ${CHROOT}/root
-	echo export PS1=\"\(chroot\) \$PS1\"  >> ${CHROOT}/root/.zshrc
+	#cp -r ~/.zsh* ~/.vim* ${CHROOT}/root
+	#echo export PS1=\"\(chroot\) \$PS1\"  >> ${CHROOT}/root/.zshrc
 
 	cat << END > $CHROOT/etc/apk/repositories
 http://uk.alpinelinux.org/alpine/latest-stable/main
 http://uk.alpinelinux.org/alpine/latest-stable/community
-http://uk.alpinelinux.org/alpine/edge/main
-http://uk.alpinelinux.org/alpine/edge/community
 END
 }
 
 chroot_mount(){
-	mount -t proc /proc ${CHROOT}/proc/
-	mount -o bind /sys  ${CHROOT}/sys/
-	mount -o bind /dev  ${CHROOT}/dev/
+	for a in proc sys dev; do mount -o bind /$a ${CHROOT}/$a; done
 }
 
 chroot_env(){
-	chroot ${CHROOT} /bin/zsh -l
+	chroot ${CHROOT} /bin/sh
+	#chroot ${CHROOT} /bin/zsh -l
 }
 
 chroot_post(){
-	${MAINREP}/sbin/apk.static --root ${CHROOT} add $POSTPACKAGES
+	#${MAIN_DIR}/sbin/apk.static --root ${CHROOT} add $POSTPACKAGES
 	# chroot ${CHROOT} /bin/zsh -l "apk update && apk upgrade && apk add $POSTPACKAGES"
 }
 
@@ -59,6 +71,8 @@ ask(){
 	fi
 }
 
+chroot_mkdir
+#ask chroot_apk_static
 ask chroot_install
 ask chroot_mount
 ask chroot_post

c/Makefile

@@ -0,0 +1,33 @@
+#SOURCE= vlc
+#CFLAGS=$(shell pkg-config --libs vlc)
+#
+#all: compilationvlc
+#
+#compilationvlc:
+#	$(CC) $(SOURCE).c -o $(SOURCE) $(CFLAGS)
+
+CC=clang
+CFLAGS=-c -Wall -g
+LDFLAGS=
+CFILES=$(wildcard *.c) # CFILES => recompiles everything on a C file change
+EXEC=$(basename $(wildcard *.c))
+#SOURCES=$(wildcard *.c)
+TESTS=$(addsuffix .test, $(EXEC))
+
+all: $(SOURCES) $(EXEC)
+
+$(EXEC): $(CFILES)
+	$(CC) $(LDFLAGS) $@.c -o $@
+
+.c.o:
+	$(CC) $(CFLAGS) $< -o $@
+
+clean:
+	@-rm $(EXEC)
+
+# to test a binary "prog" : make prog.test
+
+$(TESTS):
+	valgrind --leak-check=full -v --track-origins=yes ./$(basename $@)
+
+test: all $(TESTS)

c/Makefile.distort

@@ -0,0 +1,4 @@
+all: compilation
+
+compilation:
+	clang -o distortion $$(pkg-config --libs --cflags sndfile) -lm distort.c

c/distort.c

@@ -6,18 +6,22 @@
 
 #define BUFFER_LEN  1024
 
+void applyOverdriveDistortion (SNDFILE *inputFile, SNDFILE *outputFile);
+void applyFuzzDistortion      (SNDFILE *inputFile, SNDFILE *outputFile);
+void applyDistortion          (SNDFILE *inputFile, SNDFILE *outputFile);
+void applyBoostDistortion     (SNDFILE *inputFile, SNDFILE *outputFile, float gain);
+
 int main(int argc, char **argv) {
 	int    distortionLevel;
 	SNDFILE *infile, *outfile;
 	SF_INFO sfinfo;
-	double buffer[BUFFER_LEN];
 
 	// Check for distortion level argument
-	if (argc < 2) {
-		printf("Usage: %s distortion_level\n", argv[0]);
+	if (argc < 3) {
+		printf("Usage: %s distortion-type distortion_level\n", argv[0]);
 		return 1;
 	}
-	distortionLevel = atoi(argv[1]);
+	distortionLevel = atoi(argv[2]);
 
 	// Open standard input as input file
 	if (!(infile = sf_open_fd(0, SFM_READ, &sfinfo, 0))) {
@@ -31,16 +35,34 @@ int main(int argc, char **argv) {
 		return 1;
 	}
 
-	// Read and process data
-	while (sf_read_double(infile, buffer, BUFFER_LEN) > 0) {
-		for (int i=0; i<BUFFER_LEN; i++) {
-			// Add distortion to the sample
-			buffer[i] = buffer[i] * (1.0 + (distortionLevel/100.0) * sin(2.0 * M_PI * buffer[i]));
-		}
-
-		// Write the processed sample to the output file
-		sf_write_double(outfile, buffer, BUFFER_LEN);
+	if (memcmp(argv[1], "overdrive", strlen("overdrive")) == 0) {
+		fprintf(stderr, "overdrive\n");
+		applyOverdriveDistortion(infile, outfile);
 	}
+	if (memcmp(argv[1], "fuzz", strlen("fuzz")) == 0) {
+		fprintf(stderr, "fuzz\n");
+		applyFuzzDistortion(infile, outfile);
+	}
+	if (memcmp(argv[1], "distortion", strlen("distortion")) == 0) {
+		fprintf(stderr, "distortion\n");
+		applyDistortion(infile, outfile);
+	}
+	if (memcmp(argv[1], "boost", strlen("boost")) == 0) {
+		fprintf(stderr, "boost\n");
+		applyBoostDistortion(infile, outfile, distortionLevel);
+	}
+
+//	// Read and process data
+//	double buffer[BUFFER_LEN];
+//	while (sf_read_double(infile, buffer, BUFFER_LEN) > 0) {
+//		for (int i=0; i<BUFFER_LEN; i++) {
+//			// Add distortion to the sample
+//			buffer[i] = buffer[i] * (1.0 + (distortionLevel/100.0) * sin(2.0 * M_PI * buffer[i]));
+//		}
+//
+//		// Write the processed sample to the output file
+//		sf_write_double(outfile, buffer, BUFFER_LEN);
+//	}
 
 	// Close files
 	sf_close(infile);
@@ -48,3 +70,86 @@ int main(int argc, char **argv) {
 
 	return 0;
 }
+
+// TODO: use these functions
+
+// function to apply overdrive distortion to an audio signal using sndfile API
+void applyOverdriveDistortion(SNDFILE *inputFile, SNDFILE *outputFile)
+{
+    // read in the data from the input file
+    int bufferSize = 1024;
+    float *inputBuffer = malloc(bufferSize * sizeof(float));
+    int framesRead;
+    while ((framesRead = sf_readf_float(inputFile, inputBuffer, bufferSize))) {
+        // apply overdrive distortion
+        for (int i = 0; i < framesRead; i++) {
+            float x = inputBuffer[i];
+            float y = (1 + x) * (1 + x) / (1 + 2 * x + x * x);
+            inputBuffer[i] = y;
+        }
+        // write processed data to output file
+        sf_writef_float(outputFile, inputBuffer, framesRead);
+    }
+    free(inputBuffer);
+}
+
+// function to apply fuzz distortion to an audio signal using sndfile API
+void applyFuzzDistortion(SNDFILE *inputFile, SNDFILE *outputFile)
+{
+    // read in the data from the input file
+    int bufferSize = 1024;
+    float *inputBuffer = malloc(bufferSize * sizeof(float));
+    int framesRead;
+    while ((framesRead = sf_readf_float(inputFile, inputBuffer, bufferSize))) {
+        // apply fuzz distortion
+        for (int i = 0; i < framesRead; i++) {
+            float x = inputBuffer[i];
+            float y = x / (1 + fabs(x));
+            inputBuffer[i] = y;
+        }
+        // write processed data to output file
+        sf_writef_float(outputFile, inputBuffer, framesRead);
+    }
+    free(inputBuffer);
+}
+
+// function to apply distortion to an audio signal using sndfile API
+void applyDistortion(SNDFILE *inputFile, SNDFILE *outputFile)
+{
+    // read in the data from the input file
+    int bufferSize = 1024;
+    float *inputBuffer = malloc(bufferSize * sizeof(float));
+    int framesRead;
+    while ((framesRead = sf_readf_float(inputFile, inputBuffer, bufferSize))) {
+        // apply distortion
+        for (int i = 0; i < framesRead; i++) {
+            float x = inputBuffer[i];
+            float y = x / (1 + fabs(x));
+            y = y * 0.5 + 0.5;
+            inputBuffer[i] = y;
+        }
+        // write processed data to output file
+        sf_writef_float(outputFile, inputBuffer, framesRead);
+    }
+    free(inputBuffer);
+}
+
+// function to apply boost to an audio signal using sndfile API
+void applyBoostDistortion(SNDFILE *inputFile, SNDFILE *outputFile, float gain)
+{
+    // read in the data from the input file
+    int bufferSize = 1024;
+    float *inputBuffer = malloc(bufferSize * sizeof(float));
+    int framesRead;
+    while ((framesRead = sf_readf_float(inputFile, inputBuffer, bufferSize))) {
+        // apply boost
+        for (int i = 0; i < framesRead; i++) {
+            float x = inputBuffer[i];
+            float y = x * gain;
+            inputBuffer[i] = y;
+        }
+        // write processed data to output file
+        sf_writef_float(outputFile, inputBuffer, framesRead);
+    }
+    free(inputBuffer);
+}

mk/alpine.mk

@@ -0,0 +1,29 @@
+CHROOT    ?= /tmp/root
+ARCH      ?= x86_64
+VERSION   ?= v3.20
+MIRROR    ?= http://uk.alpinelinux.org/alpine/
+URL_REPOS ?= $(MIRROR)$(VERSION)
+
+enter:
+	chroot $(CHROOT) /bin/sh
+
+install:
+	@echo "creating a new alpine $(VERSION) chroot"
+	mkdir -p $(CHROOT)
+	apk --arch $(ARCH) -X $(URL_REPOS)/main/ -U --allow-untrusted --root $(CHROOT) --initdb add alpine-base
+	cp /etc/resolv.conf $(CHROOT)/etc/
+	echo "$(URL_REPOS)/main"       > $(CHROOT)/etc/apk/repositories
+	echo "$(URL_REPOS)/community" >> $(CHROOT)/etc/apk/repositories
+
+mount:
+	for a in proc sys dev; do mount -o bind /$$a $(CHROOT)/$$a; done
+
+unmount:
+	-umount $(CHROOT)/proc
+	-umount $(CHROOT)/sys
+	-umount $(CHROOT)/dev
+
+delete: unmount
+	rm -r $(CHROOT)
+
+new: install mount enter