This can be used to easily filter out the content of an environment
variable with multiple elements:
for elm in $list ; do
if regexp ^grub $elm ; then
append results=" $elm"
fi
done
The goal is to use it to be able to be able to filter devices being
found once we add support for --set=VARNAME inside the ls command.
Signed-off-by: Denis 'GNUtoo' Carikli <gnu...@cyberdimension.org>
---
grub-core/kern/corecmd.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/grub-core/kern/corecmd.c b/grub-core/kern/corecmd.c
index 62d434ba9..88cf6e4d4 100644
--- a/grub-core/kern/corecmd.c
+++ b/grub-core/kern/corecmd.c
@@ -59,6 +59,28 @@ grub_core_cmd_set (struct grub_command *cmd __attribute__
((unused)),
return 0;
}
+/* Append VALUE to ENVVAR content */
+static grub_err_t
+grub_core_cmd_append (struct grub_command *cmd __attribute__ ((unused)),
+ int argc, char *argv[])
+{
+ char *var;
+ char *val;
+
+ if (argc == 0)
+ return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("one argument expected"));
+
+ var = argv[0];
+ val = grub_strchr (var, '=');
+ if (! val)
+ return grub_error (GRUB_ERR_BAD_ARGUMENT, "not an assignment");
+
+ val[0] = 0;
+ grub_env_append (var, val + 1);
+
+ return 0;
+}
+
static grub_err_t
grub_core_cmd_unset (struct grub_command *cmd __attribute__ ((unused)),
int argc, char *argv[])
@@ -182,6 +204,9 @@ grub_register_core_commands (void)
N_("Set an environment variable."));
if (cmd)
cmd->flags |= GRUB_COMMAND_FLAG_EXTRACTOR;
+ grub_register_command ("append", grub_core_cmd_append,
+ N_("[ENVVAR=VALUE]"),
+ N_("Set an environment variable."));
grub_register_command ("unset", grub_core_cmd_unset,
N_("ENVVAR"),
N_("Remove an environment variable."));
--
2.45.1
_______________________________________________
Grub-devel mailing list
Grub-devel@gnu.org
https://lists.gnu.org/mailman/listinfo/grub-devel
