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Message-Id: <1426623342-16470-2-git-send-email-vadim4j@gmail.com>
Date: Tue, 17 Mar 2015 22:15:41 +0200
From: Vadim Kochan <vadim4j@...il.com>
To: netdev@...r.kernel.org
Cc: Vadim Kochan <vadim4j@...il.com>
Subject: [PATCH iproute2 v2 1/2] lib names: Split to db_names_alloc and db_names_load
From: Vadim Kochan <vadim4j@...il.com>
Also added checking for malloc failing
Signed-off-by: Vadim Kochan <vadim4j@...il.com>
---
include/names.h | 3 ++-
lib/names.c | 59 +++++++++++++++++++++++++++++++++++++++++----------------
2 files changed, 45 insertions(+), 17 deletions(-)
diff --git a/include/names.h b/include/names.h
index 4123d0b..6fed581 100644
--- a/include/names.h
+++ b/include/names.h
@@ -16,7 +16,8 @@ struct db_names {
int max;
};
-struct db_names *db_names_alloc(const char *path);
+struct db_names *db_names_alloc(void);
+int db_names_load(struct db_names *db, const char *path);
void db_names_free(struct db_names *db);
char *id_to_name(struct db_names *db, int id, char *name);
diff --git a/lib/names.c b/lib/names.c
index 93933f7..3b5b0b1 100644
--- a/lib/names.c
+++ b/lib/names.c
@@ -11,8 +11,10 @@
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
+#include <errno.h>
#include "names.h"
+#include "utils.h"
#define MAX_ENTRIES 256
#define NAME_MAX_LEN 512
@@ -48,48 +50,65 @@ static int read_id_name(FILE *fp, int *id, char *name)
return 0;
}
-struct db_names *db_names_alloc(const char *path)
+struct db_names *db_names_alloc(void)
{
struct db_names *db;
- struct db_entry *entry;
- FILE *fp;
- int id;
- char namebuf[NAME_MAX_LEN] = {0};
- int ret;
- fp = fopen(path, "r");
- if (!fp) {
- fprintf(stderr, "Can't open file: %s\n", path);
+ db = malloc(sizeof(*db));
+ if (!db)
return NULL;
- }
- db = malloc(sizeof(*db));
memset(db, 0, sizeof(*db));
db->size = MAX_ENTRIES;
db->hash = malloc(sizeof(struct db_entry *) * db->size);
memset(db->hash, 0, sizeof(struct db_entry *) * db->size);
+ return db;
+}
+
+int db_names_load(struct db_names *db, const char *path)
+{
+ struct db_entry *entry;
+ FILE *fp;
+ int id;
+ char namebuf[NAME_MAX_LEN] = {0};
+ int ret = -1;
+
+ fp = fopen(path, "r");
+ if (!fp)
+ return -ENOENT;
+
while ((ret = read_id_name(fp, &id, &namebuf[0]))) {
if (ret == -1) {
fprintf(stderr, "Database %s is corrupted at %s\n",
path, namebuf);
- fclose(fp);
- return NULL;
+ goto Exit;
}
+ ret = -1;
if (id < 0)
continue;
entry = malloc(sizeof(*entry));
- entry->id = id;
+ if (!entry)
+ goto Exit;
+
entry->name = strdup(namebuf);
+ if (!entry->name) {
+ free(entry);
+ goto Exit;
+ }
+
+ entry->id = id;
entry->next = db->hash[id & (db->size - 1)];
db->hash[id & (db->size - 1)] = entry;
}
+ ret = 0;
+Exit:
fclose(fp);
- return db;
+ return ret;
}
void db_names_free(struct db_names *db)
@@ -117,8 +136,12 @@ void db_names_free(struct db_names *db)
char *id_to_name(struct db_names *db, int id, char *name)
{
- struct db_entry *entry = db->hash[id & (db->size - 1)];
+ struct db_entry *entry;
+
+ if (!db)
+ return NULL;
+ entry = db->hash[id & (db->size - 1)];
while (entry && entry->id != id)
entry = entry->next;
@@ -136,6 +159,9 @@ int name_to_id(struct db_names *db, int *id, const char *name)
struct db_entry *entry;
int i;
+ if (!db)
+ return -1;
+
if (db->cached && strcmp(db->cached->name, name) == 0) {
*id = db->cached->id;
return 0;
@@ -145,6 +171,7 @@ int name_to_id(struct db_names *db, int *id, const char *name)
entry = db->hash[i];
while (entry && strcmp(entry->name, name))
entry = entry->next;
+
if (entry) {
db->cached = entry;
*id = entry->id;
--
2.3.1
--
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