Initial version

util.cpp

@@ -0,0 +1,51 @@
+#include "util.hpp"
+#include <string>
+#include <cstring>
+#include <cstdio>
+#include <cstdlib>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <errno.h>
+
+int exec_command (const char* command, std::string& output)
+{
+	int		pipefd[2];
+	if (pipe(pipefd) == -1) {
+		perror("pipe");
+		std::exit(9);
+	}
+	pid_t		child = fork();
+	if (child == -1) {
+		perror("fork");
+		std::exit(9);
+	}
+	if (child == 0) {
+		close(pipefd[0]);
+		if (pipefd[1] != 1) {
+			dup2(pipefd[1], 1);
+			close(pipefd[1]);
+		}
+		execl("/bin/sh", "sh", "-c", command, NULL);
+		exit(-1);
+	}
+	close(pipefd[1]);
+	char		buffer[1024];
+	ssize_t		bytes_read;
+	while ((bytes_read = read(pipefd[0], buffer, sizeof(buffer))) > 0) {
+		output.append(buffer, bytes_read);
+	}
+	close(pipefd[0]);
+	int		status = 0;
+	waitpid(child, &status, 0);
+	return status;
+}
+
+std::string resolve_path (const char* path)
+{
+	char*		resolved_path_p = realpath(path, NULL);
+	std::string	resolved_path(resolved_path_p);
+	free(resolved_path_p);
+	return resolved_path;
+}
+