init

childProcess.hpp

@@ -0,0 +1,52 @@
+#pragma once
+
+#include "basicTypes.h"
+
+struct Proc
+{
+	pid_t pid;
+	fd_t in;
+	fd_t out;
+	fd_t err;
+};
+
+struct RetProc: public Proc		/* returned process */
+{
+	RetProc(Proc, int status);	/* status as returned by waitpid */
+	bool normal_exit;
+	U8 returned;				/* return code */
+
+	/* A returned process evaluates to true if it exited normaly and
+	 * returned 0 */
+	explicit operator bool();
+
+};
+
+enum Redirect: U32
+{
+	NOTHING =0,
+	INPUT  = 1 << 0,
+	OUTPUT = 1 << 1,
+	ERR    = 1 << 2				/* todo */
+};
+
+
+/* For all funcions argv is an array of command parameters
+ * argv[0] is the command itself, argv needs to end with nullptr */
+
+/* Create a proccess and redirect anyting flaged to a new pipe
+   flags - INPUT, OUTPUT, ERR
+   return pipe file descriptors*/
+Proc createRedirProcess(const char* const argv[], U32 flags);
+
+/* Capture ouput to a pipe, can take alternative input and err FDs */
+Proc createCapProcess(const char* const argv[], fd_t in=0, fd_t err=2);
+
+/* Can take FDs as arguments which will be used instead of std */
+Proc createProcess(const char* const argv[], fd_t in=0, fd_t out=1, fd_t err=2);
+
+/* Same but waits for the process to finish */
+RetProc runProcess(const char* const argv[], fd_t in=0, fd_t out=1, fd_t err=2);
+
+/* execvp the command or exit */
+void exec_or_die(const char* const argv[]);