Updated csug socket code to match that in examples folder

original commit: 5bdf715809e5847dfa0807216bcc6d0dac2f10ea

LOG

@@ -958,3 +958,5 @@
     x86_64.ss, foreign.ms, foreign4.c
 - Avoid an occasional invalid memory violation on Windows in S_call_help
     schlib.c
+- Updated csug socket code to match that in examples folder
+    csug/foreign.stex, examples/socket.ss

csug/foreign.stex

@@ -3585,12 +3585,14 @@ transparent input from and output to a subprocess via a Scheme port.
 #include <signal.h>
 #include <sys/ioctl.h>
 #include <stdio.h>
+#include <unistd.h>
 
 /* c_write attempts to write the entire buffer, pushing through
    interrupts, socket delays, and partial-buffer writes */
-int c_write(int fd, char *buf, unsigned n) {
-    unsigned i, m;
+int c_write(int fd, char *buf, ssize_t start, ssize_t n) {
+    ssize_t i, m;
 
+    buf += start;
     m = n;
     while (m > 0) {
         if ((i = write(fd, buf, m)) < 0) {
@@ -3605,9 +3607,10 @@ int c_write(int fd, char *buf, unsigned n) {
 }
 
 /* c_read pushes through interrupts and socket delays */
-int c_read(int fd, char *buf, unsigned n) {
+int c_read(int fd, char *buf, size_t start, size_t n) {
     int i;
 
+    buf += start;
     for (;;) {
         i = read(fd, buf, n);
         if (i >= 0) return i;
@@ -3641,17 +3644,17 @@ int do_bind(int s, char *name) {
     (void) strcpy(sun.sun_path, name);
     length = sizeof(sun.sun_family) + sizeof(sun.sun_path);
 
-    return bind(s, &sun, length);
+    return bind(s, (struct sockaddr*)(&sun), length);
 }
 
 /* do_accept accepts a connection on socket s */
 int do_accept(int s) {
     struct sockaddr_un sun;
-    int length;
+    socklen_t length;
 
     length = sizeof(sun.sun_family) + sizeof(sun.sun_path);
 
-    return accept(s, &sun, &length);
+    return accept(s, (struct sockaddr*)(&sun), &length);
 }
 
 /* do_connect initiates a socket connection */
@@ -3663,7 +3666,7 @@ int do_connect(int s, char *name) {
     (void) strcpy(sun.sun_path, name);
     length = sizeof(sun.sun_family) + sizeof(sun.sun_path);
 
-    return connect(s, &sun, length);
+    return connect(s, (struct sockaddr*)(&sun), length);
 }
 
 /* get_error returns the operating system's error status */
@@ -3679,86 +3682,89 @@ char* get_error(void) {
 ;;; socket.ss
 
 ;;; Requires csocket.so, built from csocket.c.
-(case (machine-type)
-  [(i3le ti3le) (load-shared-object "libc.so.6")]
-  [(i3osx ti3osx) (load-shared-object "libc.dylib")]
-  [else (load-shared-object "libc.so")])
+;;; Example compilation command line from macOS:
+;;;  cc -c csocket.c -o csocket.o
+;;;  cc csocket.o -dynamic -dynamiclib -current_version 1.0 -compatibility_version 1.0 -o csocket.so
+(load-shared-object "./csocket.so")
 
 ;;; Requires from C library:
 ;;;   close, dup, execl, fork, kill, listen, tmpnam, unlink
-(load-shared-object "libc.so")
+(case (machine-type)
+  [(i3le ti3le a6le ta6le) (load-shared-object "libc.so.6")]
+  [(i3osx ti3osx a6osx ta6osx) (load-shared-object "libc.dylib")]
+  [else (load-shared-object "libc.so")])
 
 ;;; basic C-library stuff
 
 (define close
-  (foreign-procedure "close" (integer-32)
-    integer-32))
+  (foreign-procedure "close" (int)
+    int))
 
 (define dup
-  (foreign-procedure "dup" (integer-32)
-    integer-32))
+  (foreign-procedure "dup" (int)
+    int))
 
 (define execl4
-  (let ([execl-help
+  (let ((execl-help
          (foreign-procedure "execl"
-           (string string string string integer-32)
-           integer-32)])
+           (string string string string void*)
+           int)))
     (lambda (s1 s2 s3 s4)
       (execl-help s1 s2 s3 s4 0))))
 
 (define fork
   (foreign-procedure "fork" ()
-    integer-32))
+    int))
 
 (define kill
-  (foreign-procedure "kill" (integer-32 integer-32)
-    integer-32))
+  (foreign-procedure "kill" (int int)
+    int))
 
 (define listen
-  (foreign-procedure "listen" (integer-32 integer-32)
-    integer-32))
+  (foreign-procedure "listen" (int int)
+    int))
 
 (define tmpnam
-  (foreign-procedure "tmpnam" (integer-32)
+  (foreign-procedure "tmpnam" (void*)
     string))
 
 (define unlink
   (foreign-procedure "unlink" (string)
-    integer-32))
+    int))
 
 ;;; routines defined in csocket.c
 
 (define accept
-  (foreign-procedure "do_accept" (integer-32)
-    integer-32))
+  (foreign-procedure "do_accept" (int)
+    int))
 
 (define bytes-ready?
-  (foreign-procedure "bytes_ready" (integer-32)
+  (foreign-procedure "bytes_ready" (int)
     boolean))
 
 (define bind
-  (foreign-procedure "do_bind" (integer-32 string)
-    integer-32))
+  (foreign-procedure "do_bind" (int string)
+    int))
 
 (define c-error
   (foreign-procedure "get_error" ()
     string))
 
 (define c-read
-  (foreign-procedure "c_read" (integer-32 string integer-32)
-    integer-32))
+  (foreign-procedure "c_read" (int u8* size_t size_t)
+    ssize_t))
 
 (define c-write
-  (foreign-procedure "c_write" (integer-32 string integer-32)
-    integer-32))
+  (foreign-procedure "c_write" (int u8* size_t ssize_t)
+    ssize_t))
 
 (define connect
-  (foreign-procedure "do_connect" (integer-32 string)
-    integer-32))
+  (foreign-procedure "do_connect" (int string)
+    int))
 
 (define socket
   (foreign-procedure "do_socket" ()
-    integer-32))
+    int))
 
 ;;; higher-level routines
 
@@ -3768,7 +3774,7 @@ char* get_error(void) {
   (lambda (old new)
     (check 'close (close old))
     (unless (= (dup new) old)
-      (errorf 'dodup
+      (error 'dodup
         "couldn't set up child process io for fd ~s" old))))
 
 (define dofork
@@ -3779,7 +3785,7 @@ char* get_error(void) {
       (cond
         [(= pid 0) (child)]
         [(> pid 0) (parent pid)]
-        [else (errorf 'fork (c-error))]))))
+        [else (error 'fork (c-error))]))))
 
 (define setup-server-socket
  ; create a socket, bind it to name, and listen for connections
@@ -3803,11 +3809,11 @@ char* get_error(void) {
     (check 'accept (accept sock))))
 
 (define check
- ; raise an exception if status x is negative, using c-error to
+ ; signal an error if status x is negative, using c-error to
  ; obtain the operating-system's error message
   (lambda (who x)
     (if (< x 0)
-        (errorf who (c-error))
+        (error who (c-error))
         x)))
 
 (define terminate-process

examples/socket.ss

@@ -16,7 +16,7 @@
 ;;; Requires from C library:
 ;;;   close, dup, execl, fork, kill, listen, tmpnam, unlink
 (case (machine-type)
-  [(i3le ti3le) (load-shared-object "libc.so.6")]
+  [(i3le ti3le a6le ta6le) (load-shared-object "libc.so.6")]
   [(i3osx ti3osx a6osx ta6osx) (load-shared-object "libc.dylib")]
   [else (load-shared-object "libc.so")])