cgpt: show: add some sanity checking to -i flags
If people use -i0, the code runs as if the flag wasn't specified.
Since valid partition numbers are [1,128], and the lower layers
already reject values outside that range (except for 0), add an
explicit check to the CLI for -i0.
Trying to display specific fields w/out -i makes no sense, and
the lower layers just ignore it. Add an explicit check for it
so users don't try to do `cgpt show /dev/sda -s` and wonder why
the output is unchanged.
Passing more than one specific field selector like -s -b doesn't
work -- whatever flag was specified last wins. This isn't that
obvious to users, so throw an explicit error when it happens.
BUG=None
TEST=CQ passes
BRANCH=None
Change-Id: I7c98822b79b389824b544b128ede93458b678342
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/1773964
Reviewed-by: Julius Werner <jwerner@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/cgpt/cmd_show.c b/cgpt/cmd_show.c
index 22d3184..4d169f5 100644
--- a/cgpt/cmd_show.c
+++ b/cgpt/cmd_show.c
@@ -70,6 +70,10 @@
case 'i':
params.partition = (uint32_t)strtoul(optarg, &e, 0);
errorcnt += check_int_parse(c, e);
+ if (params.partition <= 0) {
+ Error("-i requires a number between 1 and 128 (inclusive)\n");
+ errorcnt++;
+ }
break;
case 'b':
case 's':
@@ -82,6 +86,12 @@
case 'R':
case 'B':
case 'A':
+ if (params.single_item) {
+ Error("-%c already specified; rejecting additional -%c\n",
+ params.single_item, c);
+ Error("Only a single item may be displayed at a time\n");
+ errorcnt++;
+ }
params.single_item = c;
break;
@@ -105,6 +115,10 @@
break;
}
}
+ if (!params.partition && params.single_item) {
+ Error("-i required when displaying a single item\n");
+ errorcnt++;
+ }
if (errorcnt)
{
Usage();