hush: make read builtin interruptible.

function                                             old     new   delta
builtin_read                                         185     471    +286
check_and_run_traps                                  200     262     +62
nonblock_immune_read                                  73     119     +46
sigismember                                            -      44     +44
record_signal                                          -      21     +21
sigisemptyset                                          -      16     +16
...
------------------------------------------------------------------------------
(add/remove: 5/0 grow/shrink: 7/5 up/down: 483/-46)           Total: 437 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/shell/ash.c b/shell/ash.c
index b1b11bd1b..d48cd016f 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -5918,7 +5918,7 @@ expbackq(union node *cmd, int quoted, int quotes)
  read:
                 if (in.fd < 0)
                         break;
-                i = nonblock_immune_read(in.fd, buf, sizeof(buf));
+                i = nonblock_immune_read(in.fd, buf, sizeof(buf), /*loop_on_EINTR:*/ 1);
                 TRACE(("expbackq: read returns %d\n", i));
                 if (i <= 0)
                         break;
@@ -9617,7 +9617,7 @@ preadfd(void)
 #if ENABLE_FEATURE_EDITING
  retry:
         if (!iflag || g_parsefile->pf_fd != STDIN_FILENO)
-                nr = nonblock_immune_read(g_parsefile->pf_fd, buf, IBUFSIZ - 1);
+                nr = nonblock_immune_read(g_parsefile->pf_fd, buf, IBUFSIZ - 1, /*loop_on_EINTR:*/ 1);
         else {
                 int timeout = -1;
 # if ENABLE_ASH_IDLE_TIMEOUT
@@ -9663,7 +9663,7 @@ preadfd(void)
                 }
         }
 #else
-        nr = nonblock_immune_read(g_parsefile->pf_fd, buf, IBUFSIZ - 1);
+        nr = nonblock_immune_read(g_parsefile->pf_fd, buf, IBUFSIZ - 1, /*loop_on_EINTR:*/ 1);
 #endif
 
 #if 0 /* disabled: nonblock_immune_read() handles this problem */