diff options
Diffstat (limited to 'ext/fcntl')
| -rw-r--r-- | ext/fcntl/fcntl.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/ext/fcntl/fcntl.c b/ext/fcntl/fcntl.c index 311569c134..3538d94948 100644 --- a/ext/fcntl/fcntl.c +++ b/ext/fcntl/fcntl.c @@ -68,15 +68,19 @@ Init_fcntl() #ifdef F_DUPFD /* Document-const: F_DUPFD * - * Duplicate a close-on-exec file handle to a non-close-on-exec file - * handle. + * Duplicate a file descriptor to the mimimum unused file descriptor + * greater than or equal to the argument. + * + * The close-on-exec flag of the duplicated file descriptor is set. + * (Ruby uses F_DUPFD_CLOEXEC internally if available to avoid race + * condition. F_SETFD is used if F_DUPFD_CLOEXEC is not available.) */ rb_define_const(mFcntl, "F_DUPFD", INT2NUM(F_DUPFD)); #endif #ifdef F_GETFD /* Document-const: F_GETFD * - * Read the close-on-exec flag of a file handle. + * Read the close-on-exec flag of a file descriptor. */ rb_define_const(mFcntl, "F_GETFD", INT2NUM(F_GETFD)); #endif @@ -91,7 +95,7 @@ Init_fcntl() #ifdef F_SETFD /* Document-const: F_SETFD * - * Set the close-on-exec flag of a file handle. + * Set the close-on-exec flag of a file descriptor. */ rb_define_const(mFcntl, "F_SETFD", INT2NUM(F_SETFD)); #endif @@ -128,7 +132,7 @@ Init_fcntl() rb_define_const(mFcntl, "F_SETLKW", INT2NUM(F_SETLKW)); #endif #ifdef FD_CLOEXEC - /* Document-const: F_CLOEXEC + /* Document-const: FD_CLOEXEC * * the value of the close-on-exec flag. */ |