355 lines
10 KiB
Diff
355 lines
10 KiB
Diff
|
diff --git a/.gitignore b/.gitignore
|
||
|
index 51bd99d..7ac27b0 100644
|
||
|
--- a/.gitignore
|
||
|
+++ b/.gitignore
|
||
|
@@ -32,6 +32,7 @@
|
||
|
tags
|
||
|
TAGS
|
||
|
vmlinux
|
||
|
+linux
|
||
|
System.map
|
||
|
Module.markers
|
||
|
Module.symvers
|
||
|
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
|
||
|
index 14a102e..0acfaeb 100644
|
||
|
--- a/arch/um/drivers/line.c
|
||
|
+++ b/arch/um/drivers/line.c
|
||
|
@@ -866,6 +866,6 @@ char *add_xterm_umid(char *base)
|
||
|
return base;
|
||
|
}
|
||
|
|
||
|
- snprintf(title, len, "%s (%s)", base, umid);
|
||
|
+ snprintf(title, len, "%s (%s)", umid, base);
|
||
|
return title;
|
||
|
}
|
||
|
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
|
||
|
index e14629c..c488930 100644
|
||
|
--- a/arch/um/drivers/mconsole_kern.c
|
||
|
+++ b/arch/um/drivers/mconsole_kern.c
|
||
|
@@ -4,6 +4,7 @@
|
||
|
* Licensed under the GPL
|
||
|
*/
|
||
|
|
||
|
+#include "linux/kmod.h"
|
||
|
#include <linux/console.h>
|
||
|
#include <linux/ctype.h>
|
||
|
#include <linux/interrupt.h>
|
||
|
@@ -20,6 +21,8 @@
|
||
|
#include <linux/un.h>
|
||
|
#include <linux/workqueue.h>
|
||
|
#include <linux/mutex.h>
|
||
|
+#include <linux/completion.h>
|
||
|
+#include <linux/file.h>
|
||
|
#include <asm/uaccess.h>
|
||
|
|
||
|
#include "init.h"
|
||
|
@@ -202,6 +205,65 @@ void mconsole_proc(struct mc_request *req)
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
+void mconsole_exec(struct mc_request *req)
|
||
|
+{
|
||
|
+ DECLARE_COMPLETION_ONSTACK(done);
|
||
|
+ struct subprocess_info *sub_info;
|
||
|
+ int res, len;
|
||
|
+ struct file *out;
|
||
|
+ char buf[MCONSOLE_MAX_DATA];
|
||
|
+
|
||
|
+ char *envp[] = {
|
||
|
+ "HOME=/", "TERM=linux",
|
||
|
+ "PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin",
|
||
|
+ NULL
|
||
|
+ };
|
||
|
+ char *argv[] = {
|
||
|
+ "/bin/sh", "-c",
|
||
|
+ req->request.data + strlen("exec "),
|
||
|
+ NULL
|
||
|
+ };
|
||
|
+
|
||
|
+ sub_info = call_usermodehelper_setup("/bin/sh", argv, envp, GFP_ATOMIC);
|
||
|
+ if (sub_info == NULL) {
|
||
|
+ mconsole_reply(req, "call_usermodehelper_setup failed", 1, 0);
|
||
|
+ return;
|
||
|
+ }
|
||
|
+ res = call_usermodehelper_stdoutpipe(sub_info, &out);
|
||
|
+ if (res < 0) {
|
||
|
+ call_usermodehelper_freeinfo(sub_info);
|
||
|
+ mconsole_reply(req, "call_usermodehelper_stdoutpipe failed", 1, 0);
|
||
|
+ return;
|
||
|
+ }
|
||
|
+
|
||
|
+ call_usermodehelper_setcomplete(sub_info, &done);
|
||
|
+
|
||
|
+ res = call_usermodehelper_exec(sub_info, UMH_WAIT_EXT);
|
||
|
+ if (res < 0) {
|
||
|
+ call_usermodehelper_freeinfo(sub_info);
|
||
|
+ mconsole_reply(req, "call_usermodehelper_exec failed", 1, 0);
|
||
|
+ return;
|
||
|
+ }
|
||
|
+
|
||
|
+ for (;;) {
|
||
|
+ len = out->f_op->read(out, buf, sizeof(buf), &out->f_pos);
|
||
|
+ if (len < 0) {
|
||
|
+ mconsole_reply(req, "reading output failed", 1, 0);
|
||
|
+ break;
|
||
|
+ }
|
||
|
+ if (len == 0)
|
||
|
+ break;
|
||
|
+ mconsole_reply_len(req, buf, len, 0, 1);
|
||
|
+ }
|
||
|
+ fput(out);
|
||
|
+
|
||
|
+ wait_for_completion(&done);
|
||
|
+ res = call_usermodehelper_getretval(sub_info) >> 8;
|
||
|
+ call_usermodehelper_freeinfo(sub_info);
|
||
|
+
|
||
|
+ mconsole_reply_len(req, buf, len, res, 0);
|
||
|
+}
|
||
|
+
|
||
|
void mconsole_proc(struct mc_request *req)
|
||
|
{
|
||
|
char path[64];
|
||
|
@@ -273,6 +335,7 @@ void mconsole_proc(struct mc_request *req)
|
||
|
stop - pause the UML; it will do nothing until it receives a 'go' \n\
|
||
|
go - continue the UML after a 'stop' \n\
|
||
|
log <string> - make UML enter <string> into the kernel log\n\
|
||
|
+ exec <string> - pass <string> to /bin/sh -c synchronously\n\
|
||
|
proc <file> - returns the contents of the UML's /proc/<file>\n\
|
||
|
stack <pid> - returns the stack of the specified pid\n\
|
||
|
"
|
||
|
diff --git a/arch/um/drivers/mconsole_user.c b/arch/um/drivers/mconsole_user.c
|
||
|
index f8cf4c8..019d89f 100644
|
||
|
--- a/arch/um/drivers/mconsole_user.c
|
||
|
+++ b/arch/um/drivers/mconsole_user.c
|
||
|
@@ -32,6 +32,7 @@ static struct mconsole_command commands[] = {
|
||
|
{ "stop", mconsole_stop, MCONSOLE_PROC },
|
||
|
{ "go", mconsole_go, MCONSOLE_INTR },
|
||
|
{ "log", mconsole_log, MCONSOLE_INTR },
|
||
|
+ { "exec", mconsole_exec, MCONSOLE_PROC },
|
||
|
{ "proc", mconsole_proc, MCONSOLE_PROC },
|
||
|
{ "stack", mconsole_stack, MCONSOLE_INTR },
|
||
|
};
|
||
|
diff --git a/arch/um/include/.gitignore b/arch/um/include/.gitignore
|
||
|
new file mode 100644
|
||
|
index 0000000..4c14eba
|
||
|
--- /dev/null
|
||
|
+++ b/arch/um/include/.gitignore
|
||
|
@@ -0,0 +1,2 @@
|
||
|
+shared/kern_constants.h
|
||
|
+shared/user_constants.h
|
||
|
diff --git a/arch/um/include/shared/mconsole.h b/arch/um/include/shared/mconsole.h
|
||
|
index c139ae1..dfb83b1 100644
|
||
|
--- a/arch/um/include/shared/mconsole.h
|
||
|
+++ b/arch/um/include/shared/mconsole.h
|
||
|
@@ -85,6 +85,7 @@ extern void mconsole_cad(struct mc_request *req);
|
||
|
extern void mconsole_stop(struct mc_request *req);
|
||
|
extern void mconsole_go(struct mc_request *req);
|
||
|
extern void mconsole_log(struct mc_request *req);
|
||
|
+extern void mconsole_exec(struct mc_request *req);
|
||
|
extern void mconsole_proc(struct mc_request *req);
|
||
|
extern void mconsole_stack(struct mc_request *req);
|
||
|
|
||
|
diff --git a/arch/um/kernel/.gitignore b/arch/um/kernel/.gitignore
|
||
|
new file mode 100644
|
||
|
index 0000000..803397e
|
||
|
--- /dev/null
|
||
|
+++ b/arch/um/kernel/.gitignore
|
||
|
@@ -0,0 +1,3 @@
|
||
|
+config.c
|
||
|
+config.tmp
|
||
|
+vmlinux.lds
|
||
|
diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
|
||
|
index b5afcfd..b598128 100644
|
||
|
--- a/arch/um/os-Linux/file.c
|
||
|
+++ b/arch/um/os-Linux/file.c
|
||
|
@@ -521,6 +521,8 @@ int os_create_unix_socket(const char *file, int len, int close_on_exec)
|
||
|
|
||
|
addr.sun_family = AF_UNIX;
|
||
|
|
||
|
+ if (len > sizeof(addr.sun_path))
|
||
|
+ len = sizeof(addr.sun_path);
|
||
|
snprintf(addr.sun_path, len, "%s", file);
|
||
|
|
||
|
err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
|
||
|
diff --git a/include/linux/kmod.h b/include/linux/kmod.h
|
||
|
index 384ca8b..b59c12e 100644
|
||
|
--- a/include/linux/kmod.h
|
||
|
+++ b/include/linux/kmod.h
|
||
|
@@ -45,6 +45,7 @@ static inline int request_module_nowait(const char *name, ...) { return -ENOSYS;
|
||
|
struct key;
|
||
|
struct file;
|
||
|
struct subprocess_info;
|
||
|
+struct completion;
|
||
|
|
||
|
/* Allocate a subprocess_info structure */
|
||
|
struct subprocess_info *call_usermodehelper_setup(char *path, char **argv,
|
||
|
@@ -55,13 +56,20 @@ void call_usermodehelper_setkeys(struct subprocess_info *info,
|
||
|
struct key *session_keyring);
|
||
|
int call_usermodehelper_stdinpipe(struct subprocess_info *sub_info,
|
||
|
struct file **filp);
|
||
|
+int call_usermodehelper_stdoutpipe(struct subprocess_info *sub_info,
|
||
|
+ struct file **filp);
|
||
|
+void call_usermodehelper_setcomplete(struct subprocess_info *sub_info,
|
||
|
+ struct completion *complete);
|
||
|
void call_usermodehelper_setcleanup(struct subprocess_info *info,
|
||
|
void (*cleanup)(char **argv, char **envp));
|
||
|
+int call_usermodehelper_getretval(struct subprocess_info *sub_info);
|
||
|
|
||
|
enum umh_wait {
|
||
|
UMH_NO_WAIT = -1, /* don't wait at all */
|
||
|
UMH_WAIT_EXEC = 0, /* wait for the exec, but not the process */
|
||
|
UMH_WAIT_PROC = 1, /* wait for the process to complete */
|
||
|
+ UMH_WAIT_EXT = 2, /* wait for the exec then return and signal
|
||
|
+ when the process is complete */
|
||
|
};
|
||
|
|
||
|
/* Actually execute the sub-process */
|
||
|
diff --git a/kernel/kmod.c b/kernel/kmod.c
|
||
|
index 7e95bed..3f86902 100644
|
||
|
--- a/kernel/kmod.c
|
||
|
+++ b/kernel/kmod.c
|
||
|
@@ -121,12 +121,14 @@ struct subprocess_info {
|
||
|
struct work_struct work;
|
||
|
struct completion *complete;
|
||
|
struct cred *cred;
|
||
|
+ struct completion *executed;
|
||
|
char *path;
|
||
|
char **argv;
|
||
|
char **envp;
|
||
|
enum umh_wait wait;
|
||
|
int retval;
|
||
|
struct file *stdin;
|
||
|
+ struct file *stdout;
|
||
|
void (*cleanup)(char **argv, char **envp);
|
||
|
};
|
||
|
|
||
|
@@ -163,8 +165,26 @@ static int ____call_usermodehelper(void *data)
|
||
|
FD_SET(0, fdt->open_fds);
|
||
|
FD_CLR(0, fdt->close_on_exec);
|
||
|
spin_unlock(&f->file_lock);
|
||
|
+ }
|
||
|
+ if (sub_info->stdout) {
|
||
|
+ struct files_struct *f = current->files;
|
||
|
+ struct fdtable *fdt;
|
||
|
|
||
|
- /* and disallow core files too */
|
||
|
+ sys_close(1);
|
||
|
+ sys_close(2);
|
||
|
+ get_file(sub_info->stdout);
|
||
|
+ fd_install(1, sub_info->stdout);
|
||
|
+ fd_install(2, sub_info->stdout);
|
||
|
+ spin_lock(&f->file_lock);
|
||
|
+ fdt = files_fdtable(f);
|
||
|
+ FD_SET(1, fdt->open_fds);
|
||
|
+ FD_CLR(1, fdt->close_on_exec);
|
||
|
+ FD_SET(2, fdt->open_fds);
|
||
|
+ FD_CLR(2, fdt->close_on_exec);
|
||
|
+ spin_unlock(&f->file_lock);
|
||
|
+ }
|
||
|
+ if (sub_info->stdin || sub_info->stdout) {
|
||
|
+ /* disallow core files */
|
||
|
current->signal->rlim[RLIMIT_CORE] = (struct rlimit){0, 0};
|
||
|
}
|
||
|
|
||
|
@@ -250,7 +270,7 @@ static void __call_usermodehelper(struct work_struct *work)
|
||
|
/* CLONE_VFORK: wait until the usermode helper has execve'd
|
||
|
* successfully We need the data structures to stay around
|
||
|
* until that is done. */
|
||
|
- if (wait == UMH_WAIT_PROC || wait == UMH_NO_WAIT)
|
||
|
+ if (wait == UMH_WAIT_PROC || wait == UMH_NO_WAIT || wait == UMH_WAIT_EXT)
|
||
|
pid = kernel_thread(wait_for_helper, sub_info,
|
||
|
CLONE_FS | CLONE_FILES | SIGCHLD);
|
||
|
else
|
||
|
@@ -261,6 +281,16 @@ static void __call_usermodehelper(struct work_struct *work)
|
||
|
case UMH_NO_WAIT:
|
||
|
break;
|
||
|
|
||
|
+ case UMH_WAIT_EXT:
|
||
|
+ if (pid > 0) {
|
||
|
+ complete(sub_info->executed);
|
||
|
+ break;
|
||
|
+ }
|
||
|
+ sub_info->retval = pid;
|
||
|
+ complete(sub_info->executed);
|
||
|
+ complete(sub_info->complete);
|
||
|
+ break;
|
||
|
+
|
||
|
case UMH_WAIT_PROC:
|
||
|
if (pid > 0)
|
||
|
break;
|
||
|
@@ -415,6 +445,19 @@ void call_usermodehelper_setcleanup(struct subprocess_info *info,
|
||
|
}
|
||
|
EXPORT_SYMBOL(call_usermodehelper_setcleanup);
|
||
|
|
||
|
+void call_usermodehelper_setcomplete(struct subprocess_info *info,
|
||
|
+ struct completion* complete)
|
||
|
+{
|
||
|
+ info->complete = complete;
|
||
|
+}
|
||
|
+EXPORT_SYMBOL(call_usermodehelper_setcomplete);
|
||
|
+
|
||
|
+int call_usermodehelper_getretval(struct subprocess_info *info)
|
||
|
+{
|
||
|
+ return info->retval;
|
||
|
+}
|
||
|
+EXPORT_SYMBOL(call_usermodehelper_getretval);
|
||
|
+
|
||
|
/**
|
||
|
* call_usermodehelper_stdinpipe - set up a pipe to be used for stdin
|
||
|
* @sub_info: a subprocess_info returned by call_usermodehelper_setup
|
||
|
@@ -444,6 +487,29 @@ int call_usermodehelper_stdinpipe(struct subprocess_info *sub_info,
|
||
|
}
|
||
|
EXPORT_SYMBOL(call_usermodehelper_stdinpipe);
|
||
|
|
||
|
+int call_usermodehelper_stdoutpipe(struct subprocess_info *sub_info,
|
||
|
+ struct file **filp)
|
||
|
+{
|
||
|
+ struct file *f;
|
||
|
+
|
||
|
+ f = create_write_pipe(0);
|
||
|
+ if (IS_ERR(f))
|
||
|
+ return PTR_ERR(f);
|
||
|
+ sub_info->stdout = f;
|
||
|
+
|
||
|
+ f = create_read_pipe(f, 0);
|
||
|
+ if (IS_ERR(f)) {
|
||
|
+ free_write_pipe(sub_info->stdout);
|
||
|
+ sub_info->stdout = NULL;
|
||
|
+ return PTR_ERR(f);
|
||
|
+ }
|
||
|
+ *filp = f;
|
||
|
+
|
||
|
+ return 0;
|
||
|
+}
|
||
|
+EXPORT_SYMBOL(call_usermodehelper_stdoutpipe);
|
||
|
+
|
||
|
+
|
||
|
/**
|
||
|
* call_usermodehelper_exec - start a usermode application
|
||
|
* @sub_info: information about the subprocessa
|
||
|
@@ -473,15 +539,22 @@ int call_usermodehelper_exec(struct subprocess_info *sub_info,
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
- sub_info->complete = &done;
|
||
|
+ if (wait == UMH_WAIT_EXT)
|
||
|
+ sub_info->executed = &done;
|
||
|
+ else
|
||
|
+ sub_info->complete = &done;
|
||
|
+
|
||
|
sub_info->wait = wait;
|
||
|
|
||
|
queue_work(khelper_wq, &sub_info->work);
|
||
|
if (wait == UMH_NO_WAIT) /* task has freed sub_info */
|
||
|
goto unlock;
|
||
|
+
|
||
|
wait_for_completion(&done);
|
||
|
- retval = sub_info->retval;
|
||
|
|
||
|
+ retval = sub_info->retval;
|
||
|
+ if (wait == UMH_WAIT_EXT) /* caller will free sub_info */
|
||
|
+ goto unlock;
|
||
|
out:
|
||
|
call_usermodehelper_freeinfo(sub_info);
|
||
|
unlock:
|