alpm_initialize: Fix double slash in sys hook dir path

The path of the default system hook directory was created
by concatenating `myhandle->root` (usually "/"), and
SYSHOOKDIR (usually "/usr/share/libalpm/hooks/"), resulting
in "//usr/share/libalpm/hooks/". Fix this by skipping the
initial slash from SYSHOOKDIR.

Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 5 insertions, 2 deletions

diff --git a/lib/libalpm/alpm.c b/lib/libalpm/alpm.c
index 0798c0bc..54dfade2 100644
--- a/lib/libalpm/alpm.c
+++ b/lib/libalpm/alpm.c
@@ -65,8 +65,11 @@ alpm_handle_t SYMEXPORT *alpm_initialize(const char *root, const char *dbpath,
 		goto cleanup;
 	}
 
-	MALLOC(hookdir, strlen(myhandle->root) + strlen(SYSHOOKDIR) + 1, goto cleanup);
-	sprintf(hookdir, "%s%s", myhandle->root, SYSHOOKDIR);
+	/* to contatenate myhandle->root (ends with a slash) with SYSHOOKDIR (starts
+	 * with a slash) correctly, we skip SYSHOOKDIR[0]; the regular +1 therefore
+	 * disappears from the allocation */
+	MALLOC(hookdir, strlen(myhandle->root) + strlen(SYSHOOKDIR), goto cleanup);
+	sprintf(hookdir, "%s%s", myhandle->root, SYSHOOKDIR + 1);
 	myhandle->hookdirs = alpm_list_add(NULL, hookdir);
 
 	/* set default database extension */