aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--build2/test/script/script22
1 files changed, 19 insertions, 3 deletions
diff --git a/build2/test/script/script b/build2/test/script/script
index b6a0f21..1127fb3 100644
--- a/build2/test/script/script
+++ b/build2/test/script/script
@@ -48,10 +48,26 @@ namespace build2
struct command_exit
{
- // @@ Need to understand what type we should use for status.
-
+ // C/C++ don't apply constraints to program exit code values other than
+ // being of int type.
+ //
+ // POSIX specifies that only the least significant 8 bits shall be
+ // available from wait() and waitpid(); the full value shall be
+ // available from waitid() (read more at
+ // http://pubs.opengroup.org/onlinepubs/9699919799/functions/_Exit.html).
+ // While Linux man page for waitid() doesn't mention any deviations
+ // from the standard the FreeBSD implementation (as of version 11.0)
+ // only returns 8 bits like the other wait*() calls.
+ //
+ // Windows supports 32-bit exit codes.
+ //
+ // Note that in shells some exit values can have a special meaning so
+ // using them can be a source of confusion, For bash values in the
+ // [126, 255] range are such a special ones (read more at
+ // http://tldp.org/LDP/abs/html/exitcodes.html).
+ //
exit_comparison comparison = exit_comparison::eq;
- uint16_t status = 0;
+ uint8_t status = 0;
};
struct test: command