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Add two support functions:

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o  gctl_delete_param() -- intended for parameters that are consumed
   by geom(8) itself and which should not be passed to the kernel.
o  gctl_has_param() -- intended to check if optional parameters are
   present.

Both are needed by gpart(8) to process the optional parameter for
writing bootcode to a partition (as part of the bootcode verb).
However, the kernel is itself not involved in this matter and the
parameter needs to be removed from the request destined for the
kernel.
This commit is contained in:
Marcel Moolenaar 2008-06-06 22:44:03 +00:00
parent 47b4fb4030
commit 59458baf2b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=179628
2 changed files with 47 additions and 0 deletions
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44
sbin/geom/misc/subr.c
View File

@ -414,3 +414,47 @@ gctl_change_param(struct gctl_req *req, const char *name, int len,
}
return (ENOENT);
}
int
gctl_delete_param(struct gctl_req *req, const char *name)
{
struct gctl_req_arg *ap;
unsigned int i;
if (req == NULL || req->error != NULL)
return (EDOOFUS);
i = 0;
while (i < req->narg) {
ap = &req->arg[i];
if (strcmp(ap->name, name) == 0)
break;
i++;
}
if (i == req->narg)
return (ENOENT);
req->narg--;
while (i < req->narg) {
req->arg[i] = req->arg[i + 1];
i++;
}
return (0);
}
int
gctl_has_param(struct gctl_req *req, const char *name)
{
struct gctl_req_arg *ap;
unsigned int i;
if (req == NULL || req->error != NULL)
return (0);
for (i = 0; i < req->narg; i++) {
ap = &req->arg[i];
if (strcmp(ap->name, name) == 0)
return (1);
}
return (0);
}

3
sbin/geom/misc/subr.h
View File

@ -47,4 +47,7 @@ intmax_t gctl_get_intmax(struct gctl_req *req, const char *pfmt, ...) __printfli
const char *gctl_get_ascii(struct gctl_req *req, const char *pfmt, ...) __printflike(2, 3);
int gctl_change_param(struct gctl_req *req, const char *name, int len,
const void *value);
int gctl_delete_param(struct gctl_req *req, const char *name);
int gctl_has_param(struct gctl_req *req, const char *name);
#endif /* !_SUBR_H_ */