Added prepost c code

c/swupdate-postinst-fs.c

+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+int setBuffer(char *buffer, int pos, int value){
+	if(buffer[pos] == value) return 0;
+	buffer[pos] = value;
+	return 1;
+}
+
+int main(void) {
+	char *devSettings = getenv("DEVICE_SETTINGS");
+
+	char buffer[128];
+
+	/* Get the current boot settings */
+	FILE *f = fopen(devSettings, "r");
+	fgets(buffer, 5, f);
+	fclose(f);
+
+	int doUpdate = 0;
+
+	/* Set the boot partition to the opposite of the current partition */
+	if(buffer[3] == '0') doUpdate += setBuffer(buffer, 1, '1');
+	else doUpdate += setBuffer(buffer, 1, '0');
+
+	if(doUpdate){
+		/* Create a temp file */
+		char tempFile[64];
+		strcpy(tempFile, "/tmp/swu-prepost-boot.XXXXXX");
+		int fd = mkstemp(tempFile);
+		write(fd, buffer, 4);
+
+		/* Write temp file to mtd0, then delete temp file */
+		snprintf(buffer, 127, "flashcp %s %s", tempFile, devSettings);
+		system(buffer);
+
+		unlink(tempFile); /* automatically close and delete when done */
+	}
+
+	return 0;
+}

c/swupdate-postinst-k.c

+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+int setBuffer(char *buffer, int pos, int value){
+	if(buffer[pos] == value) return 0;
+	buffer[pos] = value;
+	return 1;
+}
+
+int main(void) {
+	char *devSettings = getenv("DEVICE_SETTINGS");
+
+	char buffer[128];
+
+	/* Get the current boot settings */
+	FILE *f = fopen(devSettings, "r");
+	fgets(buffer, 5, f);
+	fclose(f);
+
+	int doUpdate = 0;
+
+	/* Set the boot partition to the opposite of the current partition */
+	if(buffer[2] == '0') doUpdate += setBuffer(buffer, 0, '1');
+	else doUpdate += setBuffer(buffer, 0, '0');
+
+	if(doUpdate){
+		/* Create a temp file */
+		char tempFile[64];
+		strcpy(tempFile, "/tmp/swu-prepost-boot.XXXXXX");
+		int fd = mkstemp(tempFile);
+		write(fd, buffer, 4);
+
+		/* Write temp file to mtd0, then delete temp file */
+		snprintf(buffer, 127, "flashcp %s %s", tempFile, devSettings);
+		system(buffer);
+
+		unlink(tempFile); /* automatically close and delete when done */
+	}
+
+	return 0;
+}

c/swupdate-preinst-fs.c

+
+#include <stdlib.h>
+#include <stdio.h>
+
+int main(void) {
+	char *devSettings = getenv("DEVICE_SETTINGS");
+	char *devFsMain = getenv("DEVICE_FILESYSTEM_MAIN");
+	char *devFsAlt = getenv("DEVICE_FILESYSTEM_ALT");
+
+	char buffer[16];
+	FILE *f = fopen(devSettings, "r");
+	fgets(buffer, 5, f);
+	fclose(f);
+
+	char cmd[128];
+	system("rm /dev/dev-fs > /dev/null"); /* Delete the current link if exists, suppressing output */
+	if(buffer[3] == '0'){ /* The current filesystem */
+		snprintf(cmd, 127, "ln -s %s /dev/dev-fs", devFsAlt);
+		system(cmd); /* Create a new link to alt fs partition */
+	} else {
+		snprintf(cmd, 127, "ln -s %s /dev/dev-fs", devFsMain);
+		system(cmd); /* Create a new link to main fs partition */
+	}
+
+	return 0;
+}

c/swupdate-preinst-k.c

+
+#include <stdlib.h>
+#include <stdio.h>
+
+int main(void) {
+	char *devSettings = getenv("DEVICE_SETTINGS");
+	char *devKMain = getenv("DEVICE_KERNEL_MAIN");
+	char *devKAlt = getenv("DEVICE_KERNEL_ALT");
+
+	char buffer[16];
+	FILE *f = fopen(devSettings, "r");
+	fgets(buffer, 5, f);
+	fclose(f);
+
+	char cmd[128];
+	system("rm /dev/dev-fs > /dev/null"); /* Delete the current link if exists, suppressing output */
+	if(buffer[2] == '0'){ /* The current filesystem */
+		snprintf(cmd, 127, "ln -s %s /dev/dev-fs", devKAlt);
+		system(cmd); /* Create a new link to alt kernel partition */
+	} else {
+		snprintf(cmd, 127, "ln -s %s /dev/dev-fs", devKMain);
+		system(cmd); /* Create a new link to main kernel partition */
+	}
+
+	return 0;
+}

c/swupdate-prepost-boot.c

+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <unistd.h>
+
+extern char **environ;
+
+int main(void) {
+	char *devSettings = getenv("DEVICE_SETTINGS");
+	if(!devSettings) {
+		printf("No settings found");
+		return 1;
+	}
+
+	char buffer[128];
+	int doUpdate=0;
+
+	/* Get the current boot settings */
+	FILE *f = fopen(devSettings, "r");
+	fgets(buffer, 5, f);
+	fclose(f);
+
+	/* Set the current boot partitions */
+	if(buffer[2] != buffer[0]){
+		buffer[2] = buffer[0];
+		doUpdate = 1;
+	}
+
+	if(buffer[3] != buffer[1]){
+		buffer[3] = buffer[1];
+		doUpdate = 1;
+	}
+
+	if(doUpdate){
+		printf("Updating device settings with new boot partitions\n");
+
+		/* Create a temp file */
+		char tempFile[64];
+		strcpy(tempFile, "/tmp/swu-prepost-boot.XXXXXX");
+		int fd = mkstemp(tempFile);
+		write(fd, buffer, 4);
+
+		/* Write temp file to mtd0, then delete temp file */
+		snprintf(buffer, 127, "flashcp %s %s", tempFile, devSettings);
+		system(buffer);
+
+		unlink(tempFile); /* automatically close and delete when done */
+	} else {
+		printf("Device settings unchanged\n");
+	}
+
+	return 0;
+}