* [PATCH] restart: add switch '--self' for self-restart
@ 2009-09-23 0:16 Oren Laadan
[not found] ` <1253664996-3439-1-git-send-email-orenl-RdfvBDnrOixBDgjK7y7TUQ@public.gmane.org>
0 siblings, 1 reply; 5+ messages in thread
From: Oren Laadan @ 2009-09-23 0:16 UTC (permalink / raw)
To: containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA
There is no reason to keep a separate program for self-restart.
Get rid of self_restart.c
Signed-off-by: Oren Laadan <orenl-eQaUEPhvms7ENvBUuze7eA@public.gmane.org>
---
Makefile | 7 +++----
restart.c | 25 +++++++++++++++++++++++--
self_restart.c | 35 -----------------------------------
3 files changed, 26 insertions(+), 41 deletions(-)
delete mode 100644 self_restart.c
diff --git a/Makefile b/Makefile
index 830e2c8..7f5cb27 100644
--- a/Makefile
+++ b/Makefile
@@ -35,7 +35,7 @@ CFLAGS += -g $(WARNS) $(CKPT_INCLUDE) $(DEBUG)
# install dir
INSTALL_DIR = /bin
-PROGS = self_checkpoint self_restart checkpoint restart ckptinfo
+PROGS = checkpoint restart ckptinfo
# other cleanup
OTHER = ckptinfo_types.c
@@ -43,7 +43,6 @@ OTHER = ckptinfo_types.c
LDLIBS = -lm
all: $(PROGS)
- echo $(SUBARCH)
@make -C test
# restart needs to be thread-safe
@@ -68,8 +67,8 @@ ckptinfo_types.c: $(CKPT_HEADERS) ckptinfo.py
@cat $(CKPT_HEADERS) | ./ckptinfo.py > ckptinfo_types.c
install:
- @echo /usr/bin/install -m 755 checkpoint restart self_restart ckptinfo $(INSTALL_DIR)
- @/usr/bin/install -m 755 checkpoint restart self_restart ckptinfo $(INSTALL_DIR)
+ @echo /usr/bin/install -m 755 checkpoint restart ckptinfo $(INSTALL_DIR)
+ @/usr/bin/install -m 755 checkpoint restart ckptinfo $(INSTALL_DIR)
clean:
@rm -f $(PROGS) $(OTHER) *~ *.o
diff --git a/restart.c b/restart.c
index 600a282..c0d52a5 100644
--- a/restart.c
+++ b/restart.c
@@ -63,6 +63,7 @@ static char usage_str[] =
" -p,--pidns create a new pid namspace (default with --pids)\n"
" -P,--no-pidns do not create a new pid namespace (default)\n"
" --pids restore original pids (default with --pidns)\n"
+" --self restart a single task, usually from self-checkpoint\n"
" -r,--root=ROOT restart under the directory ROOT instead of current\n"
" --signal=SIG send SIG to root task on SIGINT (default: SIGKILL\n"
" to container root, SIGINT otherwise)\n"
@@ -335,6 +336,7 @@ struct pid_swap {
};
struct args {
+ int self;
int pids;
int pidns;
int no_pidns;
@@ -372,6 +374,7 @@ static void parse_args(struct args *args, int argc, char *argv[])
{ "pidns", no_argument, NULL, 'p' },
{ "no-pidns", no_argument, NULL, 'P' },
{ "pids", no_argument, NULL, 3 },
+ { "self", no_argument, NULL, 6},
{ "signal", required_argument, NULL, 4 },
{ "inspect", no_argument, NULL, 5 },
{ "input", required_argument, NULL, 'i' },
@@ -417,6 +420,9 @@ static void parse_args(struct args *args, int argc, char *argv[])
case 'P':
args->no_pidns = 1;
break;
+ case 6: /* --self */
+ args->self = 1;
+ break;
case 4: /* --signal */
sig = str2sig(optarg);
if (sig < 0)
@@ -488,6 +494,13 @@ static void parse_args(struct args *args, int argc, char *argv[])
exit(1);
}
#endif
+
+ if (args->self &&
+ (args->pids || args->pidns || args->no_pidns || args->wait ||
+ args->show_status || args->copy_status || args->freezer)) {
+ printf("Invalid mix of --self with multiprocess options\n");
+ exit(1);
+ }
}
static void report_exit_status(int status, char *str, int debug)
@@ -650,14 +663,22 @@ int main(int argc, char *argv[])
if (args.freezer && freezer_prepare(&ctx) < 0)
exit(1);
- setpgrp();
-
/* chroot ? */
if (args.root && chroot(args.root) < 0) {
perror("chroot");
exit(1);
}
+ /* self-restart ends here: */
+ if (args.self) {
+ restart(getpid(), STDIN_FILENO, RESTART_TASKSELF);
+ /* reach here if restart(2) failed ! */
+ perror("restart");
+ exit(1);
+ }
+
+ setpgrp();
+
ret = ckpt_read_header(&ctx);
if (ret < 0) {
perror("read c/r header");
diff --git a/self_restart.c b/self_restart.c
deleted file mode 100644
index b0fbaab..0000000
--- a/self_restart.c
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * self_restart.c: restart a single process
- *
- * Copyright (C) 2008 Oren Laadan
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of the Linux
- * distribution for more details.
- */
-
-#define _GNU_SOURCE /* or _BSD_SOURCE or _SVID_SOURCE */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <asm/unistd.h>
-#include <sys/syscall.h>
-
-#include <linux/checkpoint.h>
-
-int main(int argc, char *argv[])
-{
- pid_t pid = getpid();
- int ret;
-
- ret = syscall(__NR_restart, pid, STDIN_FILENO, RESTART_TASKSELF);
- if (ret < 0)
- perror("restart");
-
- printf("should not reach here !\n");
-
- return 0;
-}
--
1.6.0.4
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] restart: add switch '--self' for self-restart
[not found] ` <1253664996-3439-1-git-send-email-orenl-RdfvBDnrOixBDgjK7y7TUQ@public.gmane.org>
@ 2009-09-23 4:28 ` Serge E. Hallyn
[not found] ` <20090923042805.GC11296-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
0 siblings, 1 reply; 5+ messages in thread
From: Serge E. Hallyn @ 2009-09-23 4:28 UTC (permalink / raw)
To: Oren Laadan; +Cc: containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA
Quoting Oren Laadan (orenl-RdfvBDnrOixBDgjK7y7TUQ@public.gmane.org):
> There is no reason to keep a separate program for self-restart.
> Get rid of self_restart.c
Hmm? But you also took self_checkpoint.c out of PROGS in Makefile...
Acked-by: Serge Hallyn <serue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
> Signed-off-by: Oren Laadan <orenl-eQaUEPhvms7ENvBUuze7eA@public.gmane.org>
> ---
> Makefile | 7 +++----
> restart.c | 25 +++++++++++++++++++++++--
> self_restart.c | 35 -----------------------------------
> 3 files changed, 26 insertions(+), 41 deletions(-)
> delete mode 100644 self_restart.c
>
> diff --git a/Makefile b/Makefile
> index 830e2c8..7f5cb27 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -35,7 +35,7 @@ CFLAGS += -g $(WARNS) $(CKPT_INCLUDE) $(DEBUG)
> # install dir
> INSTALL_DIR = /bin
>
> -PROGS = self_checkpoint self_restart checkpoint restart ckptinfo
> +PROGS = checkpoint restart ckptinfo
>
> # other cleanup
> OTHER = ckptinfo_types.c
> @@ -43,7 +43,6 @@ OTHER = ckptinfo_types.c
> LDLIBS = -lm
>
> all: $(PROGS)
> - echo $(SUBARCH)
> @make -C test
>
> # restart needs to be thread-safe
> @@ -68,8 +67,8 @@ ckptinfo_types.c: $(CKPT_HEADERS) ckptinfo.py
> @cat $(CKPT_HEADERS) | ./ckptinfo.py > ckptinfo_types.c
>
> install:
> - @echo /usr/bin/install -m 755 checkpoint restart self_restart ckptinfo $(INSTALL_DIR)
> - @/usr/bin/install -m 755 checkpoint restart self_restart ckptinfo $(INSTALL_DIR)
> + @echo /usr/bin/install -m 755 checkpoint restart ckptinfo $(INSTALL_DIR)
> + @/usr/bin/install -m 755 checkpoint restart ckptinfo $(INSTALL_DIR)
>
> clean:
> @rm -f $(PROGS) $(OTHER) *~ *.o
> diff --git a/restart.c b/restart.c
> index 600a282..c0d52a5 100644
> --- a/restart.c
> +++ b/restart.c
> @@ -63,6 +63,7 @@ static char usage_str[] =
> " -p,--pidns create a new pid namspace (default with --pids)\n"
> " -P,--no-pidns do not create a new pid namespace (default)\n"
> " --pids restore original pids (default with --pidns)\n"
> +" --self restart a single task, usually from self-checkpoint\n"
> " -r,--root=ROOT restart under the directory ROOT instead of current\n"
> " --signal=SIG send SIG to root task on SIGINT (default: SIGKILL\n"
> " to container root, SIGINT otherwise)\n"
> @@ -335,6 +336,7 @@ struct pid_swap {
> };
>
> struct args {
> + int self;
> int pids;
> int pidns;
> int no_pidns;
> @@ -372,6 +374,7 @@ static void parse_args(struct args *args, int argc, char *argv[])
> { "pidns", no_argument, NULL, 'p' },
> { "no-pidns", no_argument, NULL, 'P' },
> { "pids", no_argument, NULL, 3 },
> + { "self", no_argument, NULL, 6},
> { "signal", required_argument, NULL, 4 },
> { "inspect", no_argument, NULL, 5 },
> { "input", required_argument, NULL, 'i' },
> @@ -417,6 +420,9 @@ static void parse_args(struct args *args, int argc, char *argv[])
> case 'P':
> args->no_pidns = 1;
> break;
> + case 6: /* --self */
> + args->self = 1;
> + break;
> case 4: /* --signal */
> sig = str2sig(optarg);
> if (sig < 0)
> @@ -488,6 +494,13 @@ static void parse_args(struct args *args, int argc, char *argv[])
> exit(1);
> }
> #endif
> +
> + if (args->self &&
> + (args->pids || args->pidns || args->no_pidns || args->wait ||
> + args->show_status || args->copy_status || args->freezer)) {
> + printf("Invalid mix of --self with multiprocess options\n");
> + exit(1);
> + }
> }
>
> static void report_exit_status(int status, char *str, int debug)
> @@ -650,14 +663,22 @@ int main(int argc, char *argv[])
> if (args.freezer && freezer_prepare(&ctx) < 0)
> exit(1);
>
> - setpgrp();
> -
> /* chroot ? */
> if (args.root && chroot(args.root) < 0) {
> perror("chroot");
> exit(1);
> }
>
> + /* self-restart ends here: */
> + if (args.self) {
> + restart(getpid(), STDIN_FILENO, RESTART_TASKSELF);
> + /* reach here if restart(2) failed ! */
> + perror("restart");
> + exit(1);
> + }
> +
> + setpgrp();
> +
> ret = ckpt_read_header(&ctx);
> if (ret < 0) {
> perror("read c/r header");
> diff --git a/self_restart.c b/self_restart.c
> deleted file mode 100644
> index b0fbaab..0000000
> --- a/self_restart.c
> +++ /dev/null
> @@ -1,35 +0,0 @@
> -/*
> - * self_restart.c: restart a single process
> - *
> - * Copyright (C) 2008 Oren Laadan
> - *
> - * This file is subject to the terms and conditions of the GNU General Public
> - * License. See the file COPYING in the main directory of the Linux
> - * distribution for more details.
> - */
> -
> -#define _GNU_SOURCE /* or _BSD_SOURCE or _SVID_SOURCE */
> -
> -#include <stdio.h>
> -#include <stdlib.h>
> -#include <errno.h>
> -#include <fcntl.h>
> -#include <unistd.h>
> -#include <asm/unistd.h>
> -#include <sys/syscall.h>
> -
> -#include <linux/checkpoint.h>
> -
> -int main(int argc, char *argv[])
> -{
> - pid_t pid = getpid();
> - int ret;
> -
> - ret = syscall(__NR_restart, pid, STDIN_FILENO, RESTART_TASKSELF);
> - if (ret < 0)
> - perror("restart");
> -
> - printf("should not reach here !\n");
> -
> - return 0;
> -}
> --
> 1.6.0.4
>
> _______________________________________________
> Containers mailing list
> Containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
> https://lists.linux-foundation.org/mailman/listinfo/containers
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] restart: add switch '--self' for self-restart
[not found] ` <20090923042805.GC11296-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
@ 2009-09-23 7:12 ` Oren Laadan
[not found] ` <4AB9CA48.5000402-RdfvBDnrOixBDgjK7y7TUQ@public.gmane.org>
0 siblings, 1 reply; 5+ messages in thread
From: Oren Laadan @ 2009-09-23 7:12 UTC (permalink / raw)
To: Serge E. Hallyn; +Cc: containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA
Serge E. Hallyn wrote:
> Quoting Oren Laadan (orenl-RdfvBDnrOixBDgjK7y7TUQ@public.gmane.org):
>> There is no reason to keep a separate program for self-restart.
>> Get rid of self_restart.c
>
> Hmm? But you also took self_checkpoint.c out of PROGS in Makefile...
self_checkpoint.c is an example of how to do self-checkpoint.
It isn't a utility, so I see no point in compiling it....
>
> Acked-by: Serge Hallyn <serue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
>
>> Signed-off-by: Oren Laadan <orenl-eQaUEPhvms7ENvBUuze7eA@public.gmane.org>
>> ---
>> Makefile | 7 +++----
>> restart.c | 25 +++++++++++++++++++++++--
>> self_restart.c | 35 -----------------------------------
>> 3 files changed, 26 insertions(+), 41 deletions(-)
>> delete mode 100644 self_restart.c
>>
>> diff --git a/Makefile b/Makefile
>> index 830e2c8..7f5cb27 100644
>> --- a/Makefile
>> +++ b/Makefile
>> @@ -35,7 +35,7 @@ CFLAGS += -g $(WARNS) $(CKPT_INCLUDE) $(DEBUG)
>> # install dir
>> INSTALL_DIR = /bin
>>
>> -PROGS = self_checkpoint self_restart checkpoint restart ckptinfo
>> +PROGS = checkpoint restart ckptinfo
>>
>> # other cleanup
>> OTHER = ckptinfo_types.c
>> @@ -43,7 +43,6 @@ OTHER = ckptinfo_types.c
>> LDLIBS = -lm
>>
>> all: $(PROGS)
>> - echo $(SUBARCH)
>> @make -C test
>>
>> # restart needs to be thread-safe
>> @@ -68,8 +67,8 @@ ckptinfo_types.c: $(CKPT_HEADERS) ckptinfo.py
>> @cat $(CKPT_HEADERS) | ./ckptinfo.py > ckptinfo_types.c
>>
>> install:
>> - @echo /usr/bin/install -m 755 checkpoint restart self_restart ckptinfo $(INSTALL_DIR)
>> - @/usr/bin/install -m 755 checkpoint restart self_restart ckptinfo $(INSTALL_DIR)
>> + @echo /usr/bin/install -m 755 checkpoint restart ckptinfo $(INSTALL_DIR)
>> + @/usr/bin/install -m 755 checkpoint restart ckptinfo $(INSTALL_DIR)
>>
>> clean:
>> @rm -f $(PROGS) $(OTHER) *~ *.o
>> diff --git a/restart.c b/restart.c
>> index 600a282..c0d52a5 100644
>> --- a/restart.c
>> +++ b/restart.c
>> @@ -63,6 +63,7 @@ static char usage_str[] =
>> " -p,--pidns create a new pid namspace (default with --pids)\n"
>> " -P,--no-pidns do not create a new pid namespace (default)\n"
>> " --pids restore original pids (default with --pidns)\n"
>> +" --self restart a single task, usually from self-checkpoint\n"
>> " -r,--root=ROOT restart under the directory ROOT instead of current\n"
>> " --signal=SIG send SIG to root task on SIGINT (default: SIGKILL\n"
>> " to container root, SIGINT otherwise)\n"
>> @@ -335,6 +336,7 @@ struct pid_swap {
>> };
>>
>> struct args {
>> + int self;
>> int pids;
>> int pidns;
>> int no_pidns;
>> @@ -372,6 +374,7 @@ static void parse_args(struct args *args, int argc, char *argv[])
>> { "pidns", no_argument, NULL, 'p' },
>> { "no-pidns", no_argument, NULL, 'P' },
>> { "pids", no_argument, NULL, 3 },
>> + { "self", no_argument, NULL, 6},
>> { "signal", required_argument, NULL, 4 },
>> { "inspect", no_argument, NULL, 5 },
>> { "input", required_argument, NULL, 'i' },
>> @@ -417,6 +420,9 @@ static void parse_args(struct args *args, int argc, char *argv[])
>> case 'P':
>> args->no_pidns = 1;
>> break;
>> + case 6: /* --self */
>> + args->self = 1;
>> + break;
>> case 4: /* --signal */
>> sig = str2sig(optarg);
>> if (sig < 0)
>> @@ -488,6 +494,13 @@ static void parse_args(struct args *args, int argc, char *argv[])
>> exit(1);
>> }
>> #endif
>> +
>> + if (args->self &&
>> + (args->pids || args->pidns || args->no_pidns || args->wait ||
>> + args->show_status || args->copy_status || args->freezer)) {
>> + printf("Invalid mix of --self with multiprocess options\n");
>> + exit(1);
>> + }
>> }
>>
>> static void report_exit_status(int status, char *str, int debug)
>> @@ -650,14 +663,22 @@ int main(int argc, char *argv[])
>> if (args.freezer && freezer_prepare(&ctx) < 0)
>> exit(1);
>>
>> - setpgrp();
>> -
>> /* chroot ? */
>> if (args.root && chroot(args.root) < 0) {
>> perror("chroot");
>> exit(1);
>> }
>>
>> + /* self-restart ends here: */
>> + if (args.self) {
>> + restart(getpid(), STDIN_FILENO, RESTART_TASKSELF);
>> + /* reach here if restart(2) failed ! */
>> + perror("restart");
>> + exit(1);
>> + }
>> +
>> + setpgrp();
>> +
>> ret = ckpt_read_header(&ctx);
>> if (ret < 0) {
>> perror("read c/r header");
>> diff --git a/self_restart.c b/self_restart.c
>> deleted file mode 100644
>> index b0fbaab..0000000
>> --- a/self_restart.c
>> +++ /dev/null
>> @@ -1,35 +0,0 @@
>> -/*
>> - * self_restart.c: restart a single process
>> - *
>> - * Copyright (C) 2008 Oren Laadan
>> - *
>> - * This file is subject to the terms and conditions of the GNU General Public
>> - * License. See the file COPYING in the main directory of the Linux
>> - * distribution for more details.
>> - */
>> -
>> -#define _GNU_SOURCE /* or _BSD_SOURCE or _SVID_SOURCE */
>> -
>> -#include <stdio.h>
>> -#include <stdlib.h>
>> -#include <errno.h>
>> -#include <fcntl.h>
>> -#include <unistd.h>
>> -#include <asm/unistd.h>
>> -#include <sys/syscall.h>
>> -
>> -#include <linux/checkpoint.h>
>> -
>> -int main(int argc, char *argv[])
>> -{
>> - pid_t pid = getpid();
>> - int ret;
>> -
>> - ret = syscall(__NR_restart, pid, STDIN_FILENO, RESTART_TASKSELF);
>> - if (ret < 0)
>> - perror("restart");
>> -
>> - printf("should not reach here !\n");
>> -
>> - return 0;
>> -}
>> --
>> 1.6.0.4
>>
>> _______________________________________________
>> Containers mailing list
>> Containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
>> https://lists.linux-foundation.org/mailman/listinfo/containers
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] restart: add switch '--self' for self-restart
[not found] ` <4AB9CA48.5000402-RdfvBDnrOixBDgjK7y7TUQ@public.gmane.org>
@ 2009-09-23 21:41 ` Matt Helsley
[not found] ` <20090923214142.GA6876-52DBMbEzqgQ/wnmkkaCWp/UQ3DHhIser@public.gmane.org>
0 siblings, 1 reply; 5+ messages in thread
From: Matt Helsley @ 2009-09-23 21:41 UTC (permalink / raw)
To: Oren Laadan; +Cc: containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA
On Wed, Sep 23, 2009 at 03:12:08AM -0400, Oren Laadan wrote:
>
> Serge E. Hallyn wrote:
> > Quoting Oren Laadan (orenl-RdfvBDnrOixBDgjK7y7TUQ@public.gmane.org):
> >> There is no reason to keep a separate program for self-restart.
> >> Get rid of self_restart.c
> >
> > Hmm? But you also took self_checkpoint.c out of PROGS in Makefile...
>
> self_checkpoint.c is an example of how to do self-checkpoint.
Sounds like something to go into an examples/ or contrib/ subdirectory. You
could do the same with self_restart.c...
Cheers,
-Matt Helsley
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] restart: add switch '--self' for self-restart
[not found] ` <20090923214142.GA6876-52DBMbEzqgQ/wnmkkaCWp/UQ3DHhIser@public.gmane.org>
@ 2009-09-24 6:04 ` Oren Laadan
0 siblings, 0 replies; 5+ messages in thread
From: Oren Laadan @ 2009-09-24 6:04 UTC (permalink / raw)
To: Matt Helsley; +Cc: containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA
Matt Helsley wrote:
> On Wed, Sep 23, 2009 at 03:12:08AM -0400, Oren Laadan wrote:
>> Serge E. Hallyn wrote:
>>> Quoting Oren Laadan (orenl-RdfvBDnrOixBDgjK7y7TUQ@public.gmane.org):
>>>> There is no reason to keep a separate program for self-restart.
>>>> Get rid of self_restart.c
>>> Hmm? But you also took self_checkpoint.c out of PROGS in Makefile...
>> self_checkpoint.c is an example of how to do self-checkpoint.
>
> Sounds like something to go into an examples/ or contrib/ subdirectory. You
> could do the same with self_restart.c...
Good point. Done on ckpt-v18.
Oren.
^ permalink raw reply [flat|nested] 5+ messages in thread
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-- links below jump to the message on this page --
2009-09-23 0:16 [PATCH] restart: add switch '--self' for self-restart Oren Laadan
[not found] ` <1253664996-3439-1-git-send-email-orenl-RdfvBDnrOixBDgjK7y7TUQ@public.gmane.org>
2009-09-23 4:28 ` Serge E. Hallyn
[not found] ` <20090923042805.GC11296-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2009-09-23 7:12 ` Oren Laadan
[not found] ` <4AB9CA48.5000402-RdfvBDnrOixBDgjK7y7TUQ@public.gmane.org>
2009-09-23 21:41 ` Matt Helsley
[not found] ` <20090923214142.GA6876-52DBMbEzqgQ/wnmkkaCWp/UQ3DHhIser@public.gmane.org>
2009-09-24 6:04 ` Oren Laadan
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