To introduce loop device re-use amd conflict checks, we need a new parameter to
force old dangerous behavior that can cause data corruption.
Signed-off-by: Stanislav Brabec <sbrabec@xxxxxxx>
---
sys-utils/losetup.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/sys-utils/losetup.c b/sys-utils/losetup.c
index d9c75b9..0a323a9 100644
--- a/sys-utils/losetup.c
+++ b/sys-utils/losetup.c
@@ -56,6 +56,7 @@ enum {
static int no_headings;
static int raw;
static int json;
+static int force;
struct colinfo {
const char *name;
@@ -390,6 +391,7 @@ static void usage(FILE *out)
fputs(_(" -d, --detach <loopdev>... detach one or more devices\n"), out);
fputs(_(" -D, --detach-all detach all used devices\n"), out);
fputs(_(" -f, --find find first unused device\n"), out);
+ fputs(_(" -F, --force force to create conflicting loop device (dangerous)\n"), out);
fputs(_(" -c, --set-capacity <loopdev> resize the device\n"), out);
fputs(_(" -j, --associated <file> list all devices associated with <file>\n"), out);
@@ -467,6 +469,7 @@ int main(int argc, char **argv)
{ "detach", 1, 0, 'd' },
{ "detach-all", 0, 0, 'D' },
{ "find", 0, 0, 'f' },
+ { "force", 0, 0, 'F' },
{ "help", 0, 0, 'h' },
{ "associated", 1, 0, 'j' },
{ "json", 0, 0, 'J' },
@@ -502,7 +505,7 @@ int main(int argc, char **argv)
if (loopcxt_init(&lc, 0))
err(EXIT_FAILURE, _("failed to initialize loopcxt"));
- while ((c = getopt_long(argc, argv, "ac:d:Dfhj:Jlno:O:PrvV",
+ while ((c = getopt_long(argc, argv, "ac:d:DfFhj:Jlno:O:PrvV",
longopts, NULL)) != -1) {
err_exclusive_options(c, longopts, excl, excl_st);
@@ -534,6 +537,9 @@ int main(int argc, char **argv)
case 'f':
act = A_FIND_FREE;
break;
+ case 'F':
+ force = 1;
+ break;
case 'h':
usage(stdout);
break;
--
2.9.2
--
Best Regards / S pozdravem,
Stanislav Brabec
software developer
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