isodrive: first commit

src/util.cpp

@@ -0,0 +1,81 @@
+#include <fcntl.h>   
+#include <mntent.h>  
+#include <stdio.h>   
+#include <string.h>  
+#include <sys/stat.h>
+#include <unistd.h>
+#include <iostream>
+#include <fstream>
+#include <sstream>
+#include <array>
+#include <memory>
+
+
+// https://stackoverflow.com/a/123724
+void trim(char *s)
+{
+	char * p = s;
+	int l = strlen(p);
+	while(isspace(p[l - 1])) p[--l] = 0;
+	while(* p && isspace(* p)) ++p, --l;
+
+	memmove(s, p, l + 1);
+}
+
+char *fs_mount_point(char *filesystem_type) {
+	struct mntent *ent;
+	FILE *mounts;
+	char *mount_point = NULL;
+
+	mounts = setmntent("/proc/mounts", "r");
+	while (NULL != (ent = getmntent(mounts))) {
+		if (strcmp(ent->mnt_fsname, filesystem_type) == 0)
+		{
+			mount_point = ent->mnt_dir;
+			break;
+		}
+	}
+	return mount_point;
+}
+
+char *strjin(char *w1, char *w2)
+{
+	char *s = new char[strlen(w1)+strlen(w2)+1];
+	strcpy(s, w1);
+	strcat(s, w2);
+	return s;
+}
+
+bool isdir(char *path)
+{
+	struct stat sb;
+	if (stat(path, &sb) == 0)
+		return true;
+	else
+		return false;
+}
+
+void sysfs_write(char *path, char *content)
+{
+	std::cout << "Write: " << content << " -> " << path << std::endl;
+	int fd;
+	fd = open(path, O_WRONLY);
+	write(fd, content, 1);
+	close(fd);
+}
+
+char *getprop(char *key)
+{
+	std::array<char, 128> buffer;
+	char *value;
+	char *cmd = strjin("getprop ", key);
+	std::unique_ptr<FILE, decltype(&pclose)> pipe(popen(cmd, "r"), pclose);
+	while (fgets(buffer.data(), buffer.size(), pipe.get()) != nullptr)
+		value = strjin("", buffer.data());
+	trim(value);
+	return value;
+
+}
+
+
+