Launch a userspace helper. The usermodehelper function can't take a simple
string with args, so we split the arguments up into words (as required)
before invoking usermodehelper.
Signed-off-by: Nigel Cunningham <[email protected]>
kernel/power/netlink.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 54 insertions(+), 0 deletions(-)
diff --git a/kernel/power/netlink.c b/kernel/power/netlink.c
index 7b75f4f..d7a3a90 100644
--- a/kernel/power/netlink.c
+++ b/kernel/power/netlink.c
@@ -290,3 +290,57 @@ void suspend_netlink_close(struct user_h
}
}
+int suspend2_launch_userspace_program(char *command, int channel_no)
+{
+ int retval;
+ static char *envp[] = {
+ "HOME=/",
+ "TERM=linux",
+ "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
+ NULL };
+ static char *argv[] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
+ char *channel = kmalloc(6, GFP_KERNEL);
+ int arg = 0, size;
+ char test_read[255];
+ char *orig_posn = command;
+
+ if (!strlen(orig_posn))
+ return 1;
+
+ /* Up to 7 args supported */
+ while (arg < 7) {
+ sscanf(orig_posn, "%s", test_read);
+ size = strlen(test_read);
+ if (!(size))
+ break;
+ argv[arg] = kmalloc(size + 1, GFP_ATOMIC);
+ strcpy(argv[arg], test_read);
+ orig_posn += size + 1;
+ *test_read = 0;
+ arg++;
+ }
+
+ if (channel_no) {
+ sprintf(channel, "-c%d", channel_no);
+ argv[arg] = channel;
+ } else
+ arg--;
+
+ retval = call_usermodehelper(argv[0], argv, envp, 0);
+
+ if (retval)
+ printk("Failed to launch userspace program '%s': Error %d\n",
+ command, retval);
+
+ {
+ int i;
+ for (i = 0; i < arg; i++)
+ if (argv[i] && argv[i] != channel)
+ kfree(argv[i]);
+ }
+
+ kfree(channel);
+
+ return retval;
+}
+
--
Nigel Cunningham nigel at suspend2 dot net
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