Merge remote-tracking branch 'Userspace/master'

Userspace/libc/include/sys/wait.h

@@ -0,0 +1,108 @@
+#ifndef _SYS_WAIT_H
+#define _SYS_WAIT_H
+
+#include <sys/types.h>
+
+typedef enum
+{
+	P_ALL, /* Wait for any child. */
+	P_PID, /* Wait for specified process. */
+	P_PGID /* Wait for members of process group. */
+} idtype_t;
+
+typedef struct
+{
+	int stub;
+} siginfo_t;
+
+#include <bits/waitstatus.h>
+
+#define WCONTINUED 1
+#define WNOHANG 2
+#define WUNTRACED 4
+#define WEXITED 8
+#define WNOWAIT 16
+#define WSTOPPED 32
+
+/**
+ * @brief Macro for extracting the exit status from a status value.
+ *
+ * If the child process terminated normally by calling exit(3) or _exit(2),
+ * the macro WEXITSTATUS() returns the low-order 8 bits of the status value.
+ *
+ * @param status The status value to extract the exit status from.
+ * @return The exit status of the child process.
+ */
+#define WEXITSTATUS(status) __WEXITSTATUS(status)
+
+/**
+ * @brief Macro for extracting the termination signal from a status value.
+ *
+ * If the child process was terminated by a signal, the macro WTERMSIG()
+ * returns the signal number of the terminating signal.
+ *
+ * @param status The status value to extract the termination signal from.
+ * @return The termination signal of the child process.
+ */
+#define WTERMSIG(status) __WTERMSIG(status)
+
+/**
+ * @brief Macro for extracting the stop signal from a status value.
+ *
+ * If the child process was stopped by a signal, the macro WSTOPSIG()
+ * returns the signal number of the stop signal.
+ *
+ * @param status The status value to extract the stop signal from.
+ * @return The stop signal of the child process.
+ */
+#define WSTOPSIG(status) __WSTOPSIG(status)
+
+/**
+ * @brief Macro for testing whether a process exited normally.
+ *
+ * If the child process terminated normally by calling exit(3) or _exit(2),
+ * the macro WIFEXITED() returns a nonzero value. Otherwise, it returns 0.
+ *
+ * @param status The status value to test.
+ * @return A nonzero value if the child process exited normally, 0 otherwise.
+ */
+#define WIFEXITED(status) __WIFEXITED(status)
+
+/**
+ * @brief Macro for testing whether a process was terminated by a signal.
+ *
+ * If the child process was terminated by a signal, the macro WIFSIGNALED()
+ * returns a nonzero value. Otherwise, it returns 0.
+ *
+ * @param status The status value to test.
+ * @return A nonzero value if the child process was terminated by a signal, 0 otherwise.
+ */
+#define WIFSIGNALED(status) __WIFSIGNALED(status)
+
+/**
+ * @brief Macro for testing whether a process was stopped by a signal.
+ *
+ * If the child process was stopped by a signal, the macro WIFSTOPPED()
+ * returns a nonzero value. Otherwise, it returns 0.
+ *
+ * @param status The status value to test.
+ * @return A nonzero value if the child process was stopped by a signal, 0 otherwise.
+ */
+#define WIFSTOPPED(status) __WIFSTOPPED(status)
+
+/**
+ * @brief Macro for testing whether a stopped process was continued.
+ *
+ * If the child process was stopped and has been resumed by delivery of SIGCONT,
+ * the macro WIFCONTINUED() returns a nonzero value. Otherwise, it returns 0.
+ *
+ * @param status The status value to test.
+ * @return A nonzero value if the child process was continued, 0 otherwise.
+ */
+#define WIFCONTINUED(status) __WIFCONTINUED(status)
+
+pid_t wait(int *wstatus);
+pid_t waitpid(pid_t pid, int *wstatus, int options);
+int waitid(idtype_t idtype, id_t id, siginfo_t *infop, int options);
+
+#endif