7e98da058f
This change reorganizes and cleanups our patches to reduce the patch number from 314 patches to 187. That's achieved by dropping patches that are later reverted and squashing fixes for earlier patches that introduced features. There are no code changes and the diff with upstream is the same before and after the cleanup. Having fewer patches makes easier to manage the patchset and also will ease to rebase them on top of the latest grub-2.04 release. Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
94 lines
2.9 KiB
Diff
94 lines
2.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Mon, 4 Jun 2018 19:49:47 +0200
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Subject: [PATCH] grub-editenv: Add "incr" command to increment integer value
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env. variables
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To be able to automatically detect if the last boot was successful,
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We want to keep count of succesful / failed boots in some integer
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environment variable.
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This commit adds a grub-editenvt "incr" command to increment such
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integer value env. variables by 1 for use from various boot scripts.
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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---
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util/grub-editenv.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
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1 file changed, 50 insertions(+)
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diff --git a/util/grub-editenv.c b/util/grub-editenv.c
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index 118e89fe57f..2918bb71cfe 100644
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--- a/util/grub-editenv.c
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+++ b/util/grub-editenv.c
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@@ -53,6 +53,9 @@ static struct argp_option options[] = {
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/* TRANSLATORS: "unset" is a keyword. It's a summary of "unset" subcommand. */
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{N_("unset [NAME ...]"), 0, 0, OPTION_DOC|OPTION_NO_USAGE,
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N_("Delete variables."), 0},
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+ /* TRANSLATORS: "incr" is a keyword. It's a summary of "incr" subcommand. */
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+ {N_("incr [NAME ...]"), 0, 0, OPTION_DOC|OPTION_NO_USAGE,
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+ N_("Increase value of integer variables."), 0},
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{0, 0, 0, OPTION_DOC, N_("Options:"), -1},
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{"verbose", 'v', 0, 0, N_("print verbose messages."), 0},
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@@ -246,6 +249,51 @@ unset_variables (const char *name, int argc, char *argv[])
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grub_envblk_close (envblk);
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}
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+struct get_int_value_params {
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+ char *varname;
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+ int value;
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+};
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+
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+static int
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+get_int_value (const char *varname, const char *value, void *hook_data)
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+{
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+ struct get_int_value_params *params = hook_data;
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+
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+ if (strcmp (varname, params->varname) == 0) {
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+ params->value = strtol (value, NULL, 10);
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+ return 1;
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+ }
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+ return 0;
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+}
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+
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+static void
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+incr_variables (const char *name, int argc, char *argv[])
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+{
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+ grub_envblk_t envblk;
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+ char buf[16];
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+
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+ envblk = open_envblk_file (name);
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+ while (argc)
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+ {
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+ struct get_int_value_params params = {
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+ .varname = argv[0],
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+ .value = 0, /* Consider unset variables 0 */
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+ };
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+
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+ grub_envblk_iterate (envblk, ¶ms, get_int_value);
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+ snprintf(buf, sizeof(buf), "%d", params.value + 1);
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+
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+ if (! grub_envblk_set (envblk, argv[0], buf))
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+ grub_util_error ("%s", _("environment block too small"));
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+
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+ argc--;
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+ argv++;
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+ }
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+
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+ write_envblk (name, envblk);
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+ grub_envblk_close (envblk);
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+}
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+
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int
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main (int argc, char *argv[])
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{
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@@ -285,6 +333,8 @@ main (int argc, char *argv[])
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set_variables (filename, argc - curindex, argv + curindex);
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else if (strcmp (command, "unset") == 0)
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unset_variables (filename, argc - curindex, argv + curindex);
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+ else if (strcmp (command, "incr") == 0)
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+ incr_variables (filename, argc - curindex, argv + curindex);
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else
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{
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char *program = xstrdup(program_name);
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