rc

commit eab21e5857e7b19a06196ec7a9c197bc599560a0
parent bb225300e267a55fb40cf082de04567129652bda
Author: tgoodwin <tgoodwin>
Date:   Wed, 18 Feb 1998 17:10:53 +0000

reinstate rc_wait (but right this time)

Diffstat:
M
rc.h
 | 
28
++++++++++++++++++++--------
M
system-bsd.c
 | 
20
++++++++++++++++++++
M
system.c
 | 
10
----------
M
wait.c
 | 
2
+-

4 files changed, 41 insertions(+), 19 deletions(-)
diff --git a/rc.h b/rc.h
@@ -362,14 +362,6 @@ extern Node *parsetree;
 extern int yyparse(void);
 extern void initparse(void);
 
-/* rdwr.c */
-extern void writeall(int, char *, size_t);
-extern int rc_read(int, char *, size_t);
-
-#if READLINE
-extern char *rc_readline(char *prompt);
-#endif
-
 /* redir.c */
 extern void doredirs(void);
 
@@ -392,6 +384,26 @@ extern void statprint(pid_t, int);
 extern void ssetstatus(char **);
 extern char *strstatus(int s);
 
+
+/* system.c or system-bsd.c */
+extern void writeall(int, char *, size_t);
+
+#if HAVE_RESTARTABLE_SYSCALLS
+extern int rc_read(int, char *, size_t);
+#if READLINE
+extern char *rc_readline(char *prompt);
+#endif
+
+#else /* HAVE_RESTARTABLE_SYSCALLS */
+#define rc_read read
+#define rc_wait wait
+#if READLINE
+#define rc_readline readline
+#endif
+
+#endif /* HAVE_RESTARTABLE_SYSCALLS */
+
+
 /* tree.c */
 extern Node *mk(int /*nodetype*/,...);
 extern Node *treecpy(Node *, void *(*)(size_t));
diff --git a/system-bsd.c b/system-bsd.c
@@ -32,6 +32,7 @@ extern void writeall(int fd, char *buf, size_t remain) {
 
 extern int rc_read(int fd, char *buf, size_t n) {
 	ssize_t r;
+
 	interrupt_happened = FALSE;
 	if (!sigsetjmp(slowbuf.j, 1)) {
 		slow = TRUE;
@@ -49,6 +50,25 @@ extern int rc_read(int fd, char *buf, size_t n) {
 	return r;
 }
 
+static r = -1;
+extern pid_t rc_wait(int *stat) {
+	interrupt_happened = FALSE;
+	if (!sigsetjmp(slowbuf.j, 1)) {
+		slow = TRUE;
+		if (!interrupt_happened)
+			r = wait(stat);
+		else
+			r = -2;
+	} else
+		r = -2;
+	slow = FALSE;
+	if (r == -2) {
+		errno = EINTR;
+		r = -1;
+	}
+	return r;
+}
+
 /* signal-safe readline wrapper */
 #if READLINE
 extern char *rc_readline(char *prompt) {
diff --git a/system.c b/system.c
@@ -8,13 +8,3 @@ extern void writeall(int fd, char *buf, size_t remain) {
 			break; /* abort silently on errors in write() */
 	sigchk();
 }
-
-extern int rc_read(int fd, char *buf, size_t n) {
-	return read(fd, buf, n);
-}
-
-#if READLINE
-extern char *rc_readline(char *prompt) {
-	return readline(prompt);
-}
-#endif
diff --git a/wait.c b/wait.c
@@ -67,7 +67,7 @@ extern pid_t rc_wait4(pid_t pid, int *stat, bool nointr) {
 		int ret;
 		Pid *q;
 
-		ret = wait(stat);
+		ret = rc_wait(stat);
 
 		if (ret < 0) {
 			if (errno == ECHILD)