use larger string heap

[rrq/fuse_xattrs.git] / utils.c

diff --git a/utils.c b/utils.c
index f245e7e3e84849b0a62d57a9c5dd09ff872749bb..a6a8b756f8b33cbb4dc37142e5abbb2db4fed459 100644 (file)
--- a/utils.c
+++ b/utils.c
@@ -10,29 +10,57 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/stat.h>
 
 #include "utils.h"
 #include "fuse_xattrs_config.h"
+#include "xattrs_config.h"
+#include "stringmem.h"
 
-char *prepend_source_directory(const char *a, const char *b) {
-    size_t len = strlen(a) + strlen(b) + 1;
-    char *dst = (char*) malloc(sizeof(char) * len);
-    sprintf(dst, "%s%s", a, b);
+/* TODO: re-use memory to avoid calling malloc every time */
+char *prepend_source_directory(const char *b) {
+    return strjoin( xattrs_config.source_dir, b, 0 );
+}
+
+int is_directory(const char *path) {
+    struct stat statbuf;
+    if (stat(path, &statbuf) != 0) {
+        fprintf(stderr, "cannot get source directory status: %s\n", path);
+        return -1;
+    }
+
+    if (!S_ISDIR(statbuf.st_mode)) {
+        fprintf(stderr, "source directory must be a directory: %s\n", path);
+        return -1;
+    }
+
+    return 1;
+}
+
+int is_regular_file(const char *path) {
+    struct stat statbuf;
+    if (stat(path, &statbuf) != 0) {
+        return -1;
+    }
 
-    return dst;
+    if (!S_ISREG(statbuf.st_mode)) {
+        return -1;
+    }
+
+    return 1;
 }
 
 char *get_sidecar_path(const char *path)
 {
-    const size_t path_len = strlen(path);
-    const size_t sidecar_ext_len = strlen(BINARY_SIDECAR_EXT); // this can be optimized
-    const size_t sidecar_path_len = path_len + sidecar_ext_len + 1;
-    char *sidecar_path = (char *) malloc(sidecar_path_len);
-    memset(sidecar_path, '\0', sidecar_path_len);
-    memcpy(sidecar_path, path, path_len);
-    memcpy(sidecar_path + path_len, BINARY_SIDECAR_EXT, sidecar_ext_len);
-
-    return sidecar_path;
+#define CFG xattrs_config
+    if ( strncmp( path, CFG.source_dir, CFG.source_dir_size ) == 0 ) {
+       const char *p = path + CFG.source_dir_size;
+       if ( CFG.sidecar_dir ) {
+           return strjoin( CFG.sidecar_dir, p, BINARY_SIDECAR_EXT, 0 );
+       }
+    }
+    return strjoin( path, BINARY_SIDECAR_EXT, 0 );
+#undef CFG
 }
 
 // TODO: make it work for binary data