X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/b4bd05241da2772f457d0552d807e7cfd4dc8f33..4e538759c4125a2379fd625e5a92c72347017b7f:/redis-check-aof.c

diff --git a/redis-check-aof.c b/redis-check-aof.c
index 3be60781..ff0d1f82 100644
--- a/redis-check-aof.c
+++ b/redis-check-aof.c
@@ -1,6 +1,8 @@
+#include "fmacros.h"
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#include <unistd.h>
 #include <sys/stat.h>
 #include "config.h"
 
@@ -57,13 +59,9 @@ int readString(FILE *fp, char** target) {
     len += 2;
     *target = (char*)malloc(len);
     if (!readBytes(fp,*target,len)) {
-        free(*target);
-        *target = NULL;
         return 0;
     }
     if (!consumeNewline(*target+len-2)) {
-        free(*target);
-        *target = NULL;
         return 0;
     }
     (*target)[len-2] = '\0';
@@ -81,14 +79,10 @@ long process(FILE *fp) {
 
     while(1) {
         if (!multi) pos = ftell(fp);
-        if (!readArgc(fp, &argc)) {
-            break;
-        }
+        if (!readArgc(fp, &argc)) break;
 
         for (i = 0; i < argc; i++) {
-            if (!readString(fp,&str)) {
-                break;
-            }
+            if (!readString(fp,&str)) break;
             if (i == 0) {
                 if (strcasecmp(str, "multi") == 0) {
                     if (multi++) {
@@ -105,7 +99,7 @@ long process(FILE *fp) {
             free(str);
         }
 
-        /* Check if loop was finished */
+        /* Stop if the loop did not finish */
         if (i < argc) {
             if (str) free(str);
             break;
@@ -115,45 +109,75 @@ long process(FILE *fp) {
     if (feof(fp) && multi && strlen(error) == 0) {
         ERROR("Reached EOF before reading EXEC for MULTI");
     }
-
     if (strlen(error) > 0) {
         printf("%s\n", error);
     }
-
     return pos;
 }
 
 int main(int argc, char **argv) {
-    /* expect the first argument to be the dump file */
-    if (argc <= 1) {
-        printf("Usage: %s <file.aof>\n", argv[0]);
-        exit(0);
+    char *filename;
+    int fix = 0;
+
+    if (argc < 2) {
+        printf("Usage: %s [--fix] <file.aof>\n", argv[0]);
+        exit(1);
+    } else if (argc == 2) {
+        filename = argv[1];
+    } else if (argc == 3) {
+        if (strcmp(argv[1],"--fix") != 0) {
+            printf("Invalid argument: %s\n", argv[1]);
+            exit(1);
+        }
+        filename = argv[2];
+        fix = 1;
+    } else {
+        printf("Invalid arguments\n");
+        exit(1);
     }
 
-    FILE *fp = fopen(argv[1],"r");
+    FILE *fp = fopen(filename,"r+");
     if (fp == NULL) {
-        printf("Cannot open file: %s\n", argv[1]);
+        printf("Cannot open file: %s\n", filename);
         exit(1);
     }
 
     struct redis_stat sb;
     if (redis_fstat(fileno(fp),&sb) == -1) {
-        printf("Cannot stat file: %s\n", argv[1]);
+        printf("Cannot stat file: %s\n", filename);
         exit(1);
     }
 
     long size = sb.st_size;
     if (size == 0) {
-        printf("Empty file: %s\n", argv[1]);
+        printf("Empty file: %s\n", filename);
         exit(1);
     }
 
     long pos = process(fp);
-    if (pos < size) {
-        printf("First invalid operation at offset %ld.\n", pos);
-        exit(1);
+    long diff = size-pos;
+    if (diff > 0) {
+        if (fix) {
+            char buf[2];
+            printf("This will shrink the AOF from %ld bytes, with %ld bytes, to %ld bytes\n",size,diff,pos);
+            printf("Continue? [y/N]: ");
+            if (fgets(buf,sizeof(buf),stdin) == NULL ||
+                strncasecmp(buf,"y",1) != 0) {
+                    printf("Aborting...\n");
+                    exit(1);
+            }
+            if (ftruncate(fileno(fp), pos) == -1) {
+                printf("Failed to truncate AOF\n");
+                exit(1);
+            } else {
+                printf("Successfully truncated AOF\n");
+            }
+        } else {
+            printf("AOF is not valid\n");
+            exit(1);
+        }
     } else {
-        printf("AOF is valid.\n");
+        printf("AOF is valid\n");
     }
 
     fclose(fp);