From 4dad2c0644a22a935a87f86b4d63747a9598bb5d Mon Sep 17 00:00:00 2001

From: Max Reitz <mreitz@redhat.com>

Date: Mon, 18 Jun 2018 16:43:10 +0200

Subject: [PATCH 42/54] qemu-io: Exit with error when a command failed

RH-Author: Max Reitz <mreitz@redhat.com>

Message-id: <20180618164312.24423-4-mreitz@redhat.com>

Patchwork-id: 80780

O-Subject: [RHV-7.6 qemu-kvm-rhev PATCH 3/5] qemu-io: Exit with error when a command failed

Bugzilla: 1519617

RH-Acked-by: John Snow <jsnow@redhat.com>

RH-Acked-by: Kevin Wolf <kwolf@redhat.com>

RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>

Currently, qemu-io basically always returns success when it gets to

interactive mode (so once the whole command line has been parsed; even

before the commands on the command line are interpreted).  That is not

very useful.

This patch makes qemu-io return failure when any of the executed

commands failed.

Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1519617

Signed-off-by: Max Reitz <mreitz@redhat.com>

Reviewed-by: Eric Blake <eblake@redhat.com>

Message-id: 20180509194302.21585-4-mreitz@redhat.com

Signed-off-by: Max Reitz <mreitz@redhat.com>

(cherry picked from commit 6b3aa8485ca8e61b168f51d465188855cf549bd2)

Signed-off-by: Max Reitz <mreitz@redhat.com>

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>

---

 qemu-io.c | 28 ++++++++++++++++++++++------

 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/qemu-io.c b/qemu-io.c

index ec66838..13829f5 100644

--- a/qemu-io.c

+++ b/qemu-io.c

@@ -400,17 +400,21 @@ static void prep_fetchline(void *opaque)

     *fetchable= 1;

 }

-static void command_loop(void)

+static int command_loop(void)

 {

     int i, fetchable = 0, prompted = 0;

+    int ret, last_error = 0;

     char *input;

     for (i = 0; !quit_qemu_io && i < ncmdline; i++) {

-        qemuio_command(qemuio_blk, cmdline[i]);

+        ret = qemuio_command(qemuio_blk, cmdline[i]);

+        if (ret < 0) {

+            last_error = ret;

+        }

     }

     if (cmdline) {

         g_free(cmdline);

-        return;

+        return last_error;

     }

     while (!quit_qemu_io) {

@@ -431,13 +435,19 @@ static void command_loop(void)

         if (input == NULL) {

             break;

         }

-        qemuio_command(qemuio_blk, input);

+        ret = qemuio_command(qemuio_blk, input);

         g_free(input);

+        if (ret < 0) {

+            last_error = ret;

+        }

+

         prompted = 0;

         fetchable = 0;

     }

     qemu_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL);

+

+    return last_error;

 }

 static void add_user_command(char *optarg)

@@ -502,6 +512,7 @@ int main(int argc, char **argv)

     int c;

     int opt_index = 0;

     int flags = BDRV_O_UNMAP;

+    int ret;

     bool writethrough = true;

     Error *local_error = NULL;

     QDict *opts = NULL;

@@ -663,7 +674,7 @@ int main(int argc, char **argv)

             }

         }

     }

-    command_loop();

+    ret = command_loop();

     /*

      * Make sure all outstanding requests complete before the program exits.

@@ -672,5 +683,10 @@ int main(int argc, char **argv)

     blk_unref(qemuio_blk);

     g_free(readline_state);

-    return 0;

+

+    if (ret < 0) {

+        return 1;

+    } else {

+        return 0;

+    }

 }

-- 

1.8.3.1