syscall's manpage says size of buf is 1k, and its usage message
says that it's 8k, but according to the source the size of buf
is 1M.

syscall(1)
/sys/src/cmd/syscall/syscall.c:/Usage
syscall.c:6

Reference: /n/sources/patch/applied/syscall-manpage
Date: Sat Jun 19 06:22:27 CES 2010

--- /sys/src/cmd/syscall/syscall.c	Sat Jun 19 05:49:04 2010
+++ /sys/src/cmd/syscall/syscall.c	Sat Jun 19 05:49:02 2010
@@ -102,7 +102,7 @@
 	}ARGEND
 	if(argc<1 || argc>1+NARG){
     Usage:
-		fprint(2, "usage: syscall [-ox] entry [args; buf==8192 byte buffer]\n");
+		fprint(2, "usage: syscall [-ox] entry [args; buf==1 Mbyte buffer]\n");
 		fprint(2, "\tsyscall write 1 hello 5\n");
 		fprint(2, "\tsyscall -o errstr buf 1024\n");
 		fprint(2, "\tsyscall -[xs] stat file buf 1024\n");
--- /sys/man/1/syscall	Sat Jun 19 05:49:08 2010
+++ /sys/man/1/syscall	Sat Jun 19 05:49:06 2010
@@ -26,11 +26,11 @@
 a string (its address is passed),
 or the literal
 .B buf
-(a pointer to a 1 Kbyte buffer is passed).
+(a pointer to a 1 Mbyte buffer is passed).
 .PP
 If
 .B -o
-is given, the contents of the 1 Kbyte buffer are printed as a zero-terminated string
+is given, the contents of the 1 Mbyte buffer are printed as a zero-terminated string
 after the system call is done.
 The
 .B -x