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authorAlbert ARIBAUD <albert.u.boot@aribaud.net>2012-09-30 23:49:17 +0200
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2012-09-30 23:49:17 +0200
commit1c27059a2f7158a9c9a8778535b030935d75179d (patch)
treebf577d5c9f0da21c5d57feed1091214e54c39dec /include/search.h
parent8f0732ac3dc3bdbbcada313dc4b4b38d5d2c376a (diff)
parent4668a086bb0a769b741e3a4ffab85f1c41c7cdb8 (diff)
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Merge remote-tracking branch 'u-boot/master'
Diffstat (limited to 'include/search.h')
-rw-r--r--include/search.h26
1 files changed, 22 insertions, 4 deletions
diff --git a/include/search.h b/include/search.h
index ef53edb..93e1cbc 100644
--- a/include/search.h
+++ b/include/search.h
@@ -57,13 +57,23 @@ struct hsearch_data {
struct _ENTRY *table;
unsigned int size;
unsigned int filled;
+/*
+ * Callback function which will check whether the given change for variable
+ * "name" from "oldval" to "newval" may be applied or not, and possibly apply
+ * such change.
+ * When (flag & H_FORCE) is set, it shall not print out any error message and
+ * shall force overwriting of write-once variables.
+.* Must return 0 for approval, 1 for denial.
+ */
+ int (*apply)(const char *name, const char *oldval,
+ const char *newval, int flag);
};
/* Create a new hashing table which will at most contain NEL elements. */
extern int hcreate_r(size_t __nel, struct hsearch_data *__htab);
/* Destroy current internal hashing table. */
-extern void hdestroy_r(struct hsearch_data *__htab);
+extern void hdestroy_r(struct hsearch_data *__htab, int do_apply);
/*
* Search for entry matching ITEM.key in internal hash table. If
@@ -88,17 +98,25 @@ extern int hstrstr_r(const char *__match, int __last_idx, ENTRY ** __retval,
struct hsearch_data *__htab);
/* Search and delete entry matching ITEM.key in internal hash table. */
-extern int hdelete_r(const char *__key, struct hsearch_data *__htab);
+extern int hdelete_r(const char *__key, struct hsearch_data *__htab,
+ int do_apply);
extern ssize_t hexport_r(struct hsearch_data *__htab,
const char __sep, char **__resp, size_t __size,
int argc, char * const argv[]);
+/*
+ * nvars: length of vars array
+ * vars: array of strings (variable names) to import (nvars == 0 means all)
+ * do_apply: whether to call callback function to check the new argument,
+ * and possibly apply changes (false means accept everything)
+ */
extern int himport_r(struct hsearch_data *__htab,
const char *__env, size_t __size, const char __sep,
- int __flag);
+ int __flag, int nvars, char * const vars[], int do_apply);
/* Flags for himport_r() */
-#define H_NOCLEAR 1 /* do not clear hash table before importing */
+#define H_NOCLEAR (1 << 0) /* do not clear hash table before importing */
+#define H_FORCE (1 << 1) /* overwrite read-only/write-once variables */
#endif /* search.h */