update: make the package changes file read-only

include/error.h

@@ -140,6 +140,8 @@ typedef enum lm_error {
   LM_ERR_FileHashNoMatch       = 132,
   LM_ERR_InfoNotLoaded         = 133,
   LM_ERR_NoPools               = 134,
+  LM_ERR_DbChangesNotExists    = 135,
+  LM_ERR_DbChangesChmodFail    = 136,
 } lm_error_t;
 
 typedef struct lm_error_desc {

include/package.h

@@ -21,7 +21,7 @@ bool   lm_package_downloaded(lm_pkg_t *pkg);
 bool   lm_package_depend_add(lm_pkg_t *pkg, char *depend);
 size_t lm_package_depend_count(lm_pkg_t *pkg);
 size_t lm_package_depend_strlen(lm_pkg_t *pkg);
-bool   lm_package_depend_tostr(lm_pkg_t *pkg, char *buffer);
+char  *lm_package_depend_tostr(lm_pkg_t *pkg, char *buffer);
 bool   lm_package_depend_fromstr(lm_pkg_t *pkg, char *buffer);
 void   lm_package_depend_free(lm_pkg_t *pkg);
 bool   lm_package_depends(lm_pkg_t *pkg, char *dep);

locale/tr/LC_MESSAGES/libmp.po

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2024-07-18 23:48+0300\n"
+"POT-Creation-Date: 2024-07-19 19:22+0300\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -591,3 +591,11 @@ msgstr "URL hostname is too large"
 #: src/error.c:159
 msgid "pool list is empty"
 msgstr ""
+
+#: src/error.c:160
+msgid "package changes file not found in the database"
+msgstr ""
+
+#: src/error.c:161
+msgid "failed to change mod of the changes file"
+msgstr ""

src/ctx/database.c

@@ -72,11 +72,11 @@ bool lm_ctx_database_next_free(lm_ctx_t *ctx, lm_pkg_t *pkg){
 char *lm_ctx_database_changes(lm_ctx_t *ctx, lm_pkg_t *pkg){
   if(NULL == ctx || NULL == pkg){
     lm_error_set(LM_ERR_ArgNULL);
-    return false;
+    return NULL;
   }
 
   if(!lm_ctx_database_init(ctx))
-    return false; // error set by function
+    return NULL; // error set by function
 
   return lm_database_changes_get(ctx->db, pkg);
 }

src/database/changes.c

@@ -20,7 +20,15 @@ bool lm_database_changes_update(lm_database_t *db, lm_pkg_t *pkg, char *file){
   char changes_path[strlen(db->dir)+sizeof(changes_file)];
   join(changes_path, db->dir, changes_file);
 
-  return copy_file(changes_path, file);
+  if(!copy_file(changes_path, file))
+    return false;
+
+  if(chmod(changes_path, 0444) < 0){
+    lm_error_set(LM_ERR_DbChangesChmodFail);
+    return false;
+  }
+
+  return true;
 }
 
 bool lm_database_changes_del(lm_database_t *db, lm_pkg_t *pkg){
@@ -51,6 +59,7 @@ char *lm_database_changes_get(lm_database_t *db, lm_pkg_t *pkg){
   join(changes_path, db->dir, changes_file);
 
   if(!exists(changes_path)){
+    lm_error_set(LM_ERR_DbChangesNotExists);
     free(changes_path);
     return NULL;
   }

src/error.c

@@ -157,6 +157,8 @@ void lm_error_set(lm_error_t code, ...) {
       {.code = LM_ERR_FileHashNoMatch,         .desc = _("file hash does not match for %s")                           },
       {.code = LM_ERR_InfoNotLoaded,           .desc = _("pool info is not loaded")                                   },
       {.code = LM_ERR_NoPools,                 .desc = _("pool list is empty")                                        },
+      {.code = LM_ERR_DbChangesNotExists,      .desc = _("package changes file not found in the database")            },
+      {.code = LM_ERR_DbChangesChmodFail,      .desc = _("failed to change mod of the changes file")                  },
   };
 
   char *fmt     = NULL;

src/package/depend.c

@@ -69,15 +69,21 @@ size_t lm_package_depend_strlen(lm_pkg_t *pkg){
   return len;
 }
 
-bool lm_package_depend_tostr(lm_pkg_t *pkg, char *buffer){
-  if(NULL == buffer || NULL == pkg){
+char *lm_package_depend_tostr(lm_pkg_t *pkg, char *buffer){
+  if(NULL == pkg){
     lm_error_set(LM_ERR_ArgNULL);
-    return false;
+    return NULL;
+  }
+
+  if(NULL == buffer){
+    size_t buflen = lm_package_depend_strlen(pkg)+1;
+    buffer = malloc(buflen);
+    bzero(buffer, buflen);
   }
 
   if(NULL == pkg->depends){
     buffer[0] = 0;
-    return true;
+    return buffer;
   }
 
   size_t bufsz = 0, depsz = 0;
@@ -97,7 +103,7 @@ bool lm_package_depend_tostr(lm_pkg_t *pkg, char *buffer){
   }
 
   buffer[bufsz] = 0;
-  return true;
+  return buffer;
 }
 
 bool lm_package_depend_fromstr(lm_pkg_t *pkg, char *buffer){