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config(8): Allow duplicate options to be specified

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config(8)'s option handling has been written to allow duplicate options; if
the value changes, then the latest value is used and an informative message
is printed to stderr like so:

/usr/src/sys/amd64/conf/TEST: option "VERBOSE_SYSINIT" redefined from 0 to 1

Currently, this is only a possibility for cpu types, MAXUSERS, and
MACHINE_ARCH. Anything else duplicated in a config file will use the first
value set and error about duplicated options on subsequent appearances,
which is arguably unfriendly since one could specify:

include GENERIC
nooptions VERBOSE_SYSINIT
options VERBOSE_SYSINIT

to redefine the value later anyways.

Reported by:	mmacy
MFC after:	1 week
This commit is contained in:
Kyle Evans 2018-12-22 06:02:34 +00:00
parent 9d0e9f8ef5
commit 993e5c4fd2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=342362
1 changed files with 20 additions and 14 deletions
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34
usr.sbin/config/config.y
View File

@ -99,7 +99,7 @@ static void newdev(char *name);
static void newfile(char *name);
static void newenvvar(char *name, bool is_file);
static void rmdev_schedule(struct device_head *dh, char *name);
static void newopt(struct opt_head *list, char *name, char *value, int append);
static void newopt(struct opt_head *list, char *name, char *value, int append, int dupe);
static void rmopt_schedule(struct opt_head *list, char *name);
static char *
@ -212,7 +212,7 @@ System_spec:
;
System_id:
Save_id { newopt(&mkopt, ns("KERNEL"), $1, 0); };
Save_id { newopt(&mkopt, ns("KERNEL"), $1, 0, 0); };
System_parameter_list:
System_parameter_list ID
@ -232,13 +232,13 @@ NoOpt_list:
;
Option:
Save_id {
newopt(&opt, $1, NULL, 0);
newopt(&opt, $1, NULL, 0, 1);
if (strchr($1, '=') != NULL)
errx(1, "%s:%d: The `=' in options should not be "
"quoted", yyfile, yyline);
} |
Save_id EQUALS Opt_value {
newopt(&opt, $1, $3, 0);
newopt(&opt, $1, $3, 0, 1);
} ;
NoOption:
@ -266,10 +266,10 @@ Mkopt_list:
;
Mkoption:
Save_id { newopt(&mkopt, $1, ns(""), 0); } |
Save_id EQUALS { newopt(&mkopt, $1, ns(""), 0); } |
Save_id EQUALS Opt_value { newopt(&mkopt, $1, $3, 0); } |
Save_id PLUSEQUALS Opt_value { newopt(&mkopt, $1, $3, 1); } ;
Save_id { newopt(&mkopt, $1, ns(""), 0, 0); } |
Save_id EQUALS { newopt(&mkopt, $1, ns(""), 0, 0); } |
Save_id EQUALS Opt_value { newopt(&mkopt, $1, $3, 0, 0); } |
Save_id PLUSEQUALS Opt_value { newopt(&mkopt, $1, $3, 1, 0); } ;
Dev:
ID { $$ = $1; }
@ -295,7 +295,7 @@ NoDev_list:
Device:
Dev {
newopt(&opt, devopt($1), ns("1"), 0);
newopt(&opt, devopt($1), ns("1"), 0, 0);
/* and the device part */
newdev($1);
}
@ -432,7 +432,7 @@ findopt(struct opt_head *list, char *name)
* Add an option to the list of options.
*/
static void
newopt(struct opt_head *list, char *name, char *value, int append)
newopt(struct opt_head *list, char *name, char *value, int append, int dupe)
{
struct opt *op, *op2;
@ -445,7 +445,7 @@ newopt(struct opt_head *list, char *name, char *value, int append)
}
op2 = findopt(list, name);
if (op2 != NULL && !append) {
if (op2 != NULL && !append && !dupe) {
fprintf(stderr,
"WARNING: duplicate option `%s' encountered.\n", name);
return;
@ -458,9 +458,15 @@ newopt(struct opt_head *list, char *name, char *value, int append)
op->op_ownfile = 0;
op->op_value = value;
if (op2 != NULL) {
while (SLIST_NEXT(op2, op_append) != NULL)
op2 = SLIST_NEXT(op2, op_append);
SLIST_NEXT(op2, op_append) = op;
if (append) {
while (SLIST_NEXT(op2, op_append) != NULL)
op2 = SLIST_NEXT(op2, op_append);
SLIST_NEXT(op2, op_append) = op;
} else {
while (SLIST_NEXT(op2, op_next) != NULL)
op2 = SLIST_NEXT(op2, op_next);
SLIST_NEXT(op2, op_next) = op;
}
} else
SLIST_INSERT_HEAD(list, op, op_next);
}