make: do not follow symlinks when resolving blogcfile path

1 files changed, 35 insertions, 0 deletions

diff --git a/src/blogc-make/utils.c b/src/blogc-make/utils.c
index 0c984f6..91b7b53 100644
--- a/src/blogc-make/utils.c
+++ b/src/blogc-make/utils.c
@@ -6,10 +6,18 @@
  * See the file LICENSE.
  */
 
+#include <errno.h>
+#include <limits.h>
 #include <stdbool.h>
 #include <string.h>
+#include <unistd.h>
+#include "../common/error.h"
 #include "../common/utils.h"
 
+#ifndef PATH_MAX
+#define PATH_MAX 4096
+#endif
+
 
 char*
 bm_generate_filename(const char *dir, const char *prefix, const char *fname,
@@ -59,3 +67,30 @@ bm_generate_filename(const char *dir, const char *prefix, const char *fname,
 
     return bc_string_free(rv, false);
 }
+
+
+char*
+bm_abspath(const char *path, bc_error_t **err)
+{
+    if (err == NULL || *err != NULL)
+        return NULL;
+
+    if (path[0] == '/') {
+        return bc_strdup(path);
+    }
+
+    char cwd[PATH_MAX];
+    if (NULL == getcwd(cwd, sizeof(cwd))) {
+        *err = bc_error_new_printf(BLOGC_MAKE_ERROR_UTILS,
+            "Failed to detect absolute path (%s): %s", path, strerror(errno));
+        return NULL;
+    }
+
+    if (cwd[0] != '/') {
+        *err = bc_error_new_printf(BLOGC_MAKE_ERROR_UTILS,
+            "Failed to get current working directory: %s", cwd);
+        return NULL;
+    }
+
+    return bc_strdup_printf("%s/%s", cwd, path);
+}