1 files changed, 85 insertions, 0 deletions
diff --git a/src/libs6rc/s6rc_repo_fillset.c b/src/libs6rc/s6rc_repo_fillset.c
new file mode 100644
index 0000000..9548c19
--- /dev/null
+++ b/src/libs6rc/s6rc_repo_fillset.c
@@ -0,0 +1,85 @@
+/* ISC license. */
+
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include <skalibs/direntry.h>
+#include <skalibs/strerr.h>
+
+#include <s6-rc/repo.h>
+
+int s6rc_repo_fillset (char const *repo, char const *set)
+{
+  size_t repolen = strlen(repo) ;
+  size_t setlen = strlen(set) ;
+  DIR *dir ;
+  char atomics[repolen + 18] ;
+  char setfn[repolen + 10 + setlen] ;
+  memcpy(atomics, repo, repolen) ;
+  memcpy(atomics + repolen, "/sources/.atomics", 18) ;
+  memcpy(setfn, repo, repolen) ;
+  memcpy(setfn + repolen, "/sources/", 9) ;
+  memcpy(setfn + repolen + 9, set, setlen+1) ;
+
+  dir = opendir(atomics) ;
+  if (!dir)
+  {
+    strerr_warnfu2sys("opendir ", atomics) ;
+    return 0 ;
+  }
+  for (;;)
+  {
+    size_t len ;
+    unsigned int subi = 1 ;
+    direntry *d ;
+    errno = 0 ;
+    d = readdir(dir) ;
+    if (!d) break ;
+    if (d->d_name[0] == '.') continue ;
+
+    len = strlen(d->d_name) ;
+    char src[len + 30] ;
+    char dst[repolen + 18 + setlen + len] ;
+    memcpy(src, "../.atomics/", 12) ;
+    memcpy(src + 12, d->d_name, len) ;
+    memcpy(src + 12 + len, "/flag-essential", 16) ;
+    if (access(src, F_OK) == -1)
+    {
+      if (errno != ENOENT)
+      {
+        strerr_warnfu2sys("access ", src) ;
+        break ;
+      }
+    }
+    else subi = 2 ;
+    memcpy(src + 18 + len, "recommended", 12) ;
+    if (access(src, F_OK) == -1)
+    {
+      if (errno != ENOENT)
+      {
+        strerr_warnfu2sys("access ", src) ;
+        break ;
+      }
+    }
+    else subi = 2 ;
+    src[12 + len] = 0 ;
+    memcpy(dst, setfn, repolen + 10 + setlen) ;
+    memcpy(dst + repolen + 10 + setlen, s6rc_repo_sublist[subi], 6) ;
+    dst[repolen + setlen + 16] = '/' ;
+    memcpy(dst + repolen + setlen + 17, d->d_name, len+1) ;
+    if (symlink(src, dst) == -1)
+    {
+      strerr_warnfu4sys("make a symlink named ", dst, " pointing to ", src) ;
+      return 0 ;
+    }
+  }
+  dir_close(dir) ;
+  if (errno)
+  {
+    strerr_warnfu2sys("readdir ", atomics) ;
+    return 0 ;
+  }
+
+  return 1 ;
+}