Changeset 3927

Timestamp:

Oct 26, 2014, 3:15:37 AM (11 years ago)

Author:

bird

Message:

trunk,0.6: syslimits.h,param.h: Lowered ARG_MAX/NCARGS by 32-bytes just to be on the safe side of the 32KB limit imposed by DosExecPgm. Corrected the comments.

Location:

trunk/libc/include/sys

Files:

• param.h (modified) (1 diff)
• syslimits.h (modified) (1 diff)

trunk/libc/include/sys/param.h

@@ -81 +81 @@
 #ifndef NCARGS
 /** Max argument size for an exec function.
- * OS2: Assuming at least 4KB of environment gives us 0xf000 at the very best.
- *      However we set it to 32KB which should be a safe max. */
+ * OS2: DosExecPgm does not accept more than 32KB of command line arguments
+ *      (ditto for environment). So, we keep the limit a few bytes short of
+ *      this to avoid rounding errors on the user side. */
 #define NCARGS          ARG_MAX
 #endif

trunk/libc/include/sys/syslimits.h

@@ -15 +15 @@
 #ifndef ARG_MAX
 /** Max argument size for an exec function.
- * OS2: Assuming at least 4KB of environment gives us 0xf000 at the very best.
- *      However we set it to 32KB which should be a safe max. */
-#define ARG_MAX         0x8000
+ * OS2: DosExecPgm does not accept more than 32KB of command line arguments
+ *      (ditto for environment). So, we keep the limit a few bytes short of
+ *      this to avoid rounding errors on the user side. */
+#define ARG_MAX         0x7fe0
 #endif