Finish s6-rc-repo-init

Signed-off-by: Laurent Bercot <ska@appnovation.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/src/libs6rc/s6rc_repo_cleanup.c b/src/libs6rc/s6rc_repo_cleanup.c
new file mode 100644
index 0000000..9b42c06
--- /dev/null
+++ b/src/libs6rc/s6rc_repo_cleanup.c
@@ -0,0 +1,76 @@
+/* ISC license. */
+
+#include <skalibs/bsdsnowflake.h>
+
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include <skalibs/stat.h>
+#include <skalibs/direntry.h>
+#include <skalibs/posixplz.h>
+#include <skalibs/djbunix.h>
+
+#include <s6-rc/repo.h>
+
+static inline int sub_cleanup (char const *subdir)
+{
+  size_t dirlen = strlen(subdir) ;
+  DIR *dir = opendir(subdir) ;
+  if (!dir) return 0 ;
+  for (;;)
+  {
+    size_t len ;
+    direntry *d ;
+    errno = 0 ;
+    d = readdir(dir) ;
+    if (!d) break ;
+    if (d->d_name[0] == '.') continue ;
+    len = strlen(d->d_name) ;
+    {
+      char fn[dirlen + len + 2] ;
+      memcpy(fn, dir, dirlen) ;
+      fn[dirlen] = '/' ;
+      memcpy(fn + dirlen + 1, d->d_name, len + 1) ;
+      if (access(fn, F_OK) == -1)
+      {
+        if (errno == ENOENT) unlink_void(fn) ;
+        else break ;
+      }
+      else
+      {
+        struct stat st ;
+        if (lstat(fn, &st) == -1) break ;
+        if (!S_ISLNK(st.st_mode)) rm_rf(fn) ;
+      }
+    }
+  }
+  dir_close(dir) ;
+  return !errno ;
+}
+
+int s6rc_repo_cleanup (char const *repo)
+{
+  size_t repolen = strlen(repo) ;
+  DIR *dir = opendir(repo) ;
+  if (!dir) return 0 ;
+  for (;;)
+  {
+    size_t len ;
+    direntry *d ;
+    errno = 0 ;
+    d = readdir(dir) ;
+    if (!d) break ;
+    if (d->d_name[0] == '.') continue ;
+    len = strlen(d->d_name) ;
+    {
+      char fn[repolen + len + 2] ;
+      memcpy(fn, repo, repolen) ;
+      fn[repolen] = '/' ;
+      memcpy(fn + repolen + 1, d->d_name, len + 1) ;
+      if (!sub_cleanup(fn)) break ;
+    }
+  }
+  dir_close(dir) ;
+  return !errno ;
+}