From 348b1f1c6064990210a6797c86514fd358b73062 Mon Sep 17 00:00:00 2001 From: Gerlando Falauto Date: Fri, 24 Aug 2012 00:11:38 +0000 Subject: env: make himport_r() selective on variables Add 2 new arguments to himport_r(): o "nvars", "vars": number and list of variables to take into account (0 means ALL) NOTE: This patch does not change the current behaviour. Signed-off-by: Gerlando Falauto Reviewed-by: Marek Vasut --- lib/hashtable.c | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) (limited to 'lib') diff --git a/lib/hashtable.c b/lib/hashtable.c index abd61c8..0610e86 100644 --- a/lib/hashtable.c +++ b/lib/hashtable.c @@ -603,6 +603,24 @@ ssize_t hexport_r(struct hsearch_data *htab, const char sep, * himport() */ +/* Check whether variable name is amongst vars[] */ +static int is_var_in_set(const char *name, int nvars, char * const vars[]) +{ + int i = 0; + + /* No variables specified means process all of them */ + if (nvars == 0) + return 1; + + for (i = 0; i < nvars; i++) { + if (!strcmp(name, vars[i])) + return 1; + } + debug("Skipping non-listed variable %s\n", name); + + return 0; +} + /* * Import linearized data into hash table. * @@ -639,7 +657,8 @@ ssize_t hexport_r(struct hsearch_data *htab, const char sep, */ int himport_r(struct hsearch_data *htab, - const char *env, size_t size, const char sep, int flag) + const char *env, size_t size, const char sep, int flag, + int nvars, char * const vars[]) { char *data, *sp, *dp, *name, *value; @@ -726,6 +745,8 @@ int himport_r(struct hsearch_data *htab, *dp++ = '\0'; /* terminate name */ debug("DELETE CANDIDATE: \"%s\"\n", name); + if (!is_var_in_set(name, nvars, vars)) + continue; if (hdelete_r(name, htab) == 0) debug("DELETE ERROR ##############################\n"); @@ -743,6 +764,10 @@ int himport_r(struct hsearch_data *htab, *sp++ = '\0'; /* terminate value */ ++dp; + /* Skip variables which are not supposed to be processed */ + if (!is_var_in_set(name, nvars, vars)) + continue; + /* enter into hash table */ e.key = name; e.data = value; -- cgit v1.1