Separate libs6rcrepo

1 files changed, 65 insertions, 0 deletions

diff --git a/src/repo/s6rc_repo_makestores.c b/src/repo/s6rc_repo_makestores.c
new file mode 100644
index 0000000..f61f94c
--- /dev/null
+++ b/src/repo/s6rc_repo_makestores.c
@@ -0,0 +1,65 @@
+/* ISC license. */
+
+#include <string.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include <skalibs/uint16.h>
+#include <skalibs/posixplz.h>
+#include <skalibs/stat.h>
+#include <skalibs/strerr.h>
+#include <skalibs/djbunix.h>
+#include <skalibs/unix-transactional.h>
+
+#include <s6-rc/repo.h>
+
+int s6rc_repo_makestores (char const *repo, char const *const *stores, uint16_t n, char *sold)
+{
+  size_t repolen = strlen(repo) ;
+  mode_t m = umask(0) ;
+  char slink[repolen + 8] ;
+  char sdir[repolen + 21] ;
+
+  memcpy(slink, repo, repolen) ;
+  memcpy(slink + repolen, "/stores", 8) ;
+  memcpy(sdir, slink, repolen + 1) ;
+  memcpy(sdir + repolen + 1, ".stores:XXXXXX", 15) ;
+
+  if (!mkdtemp(sdir))
+  {
+    umask(m) ;
+    strerr_warnfu2sys("mkdtemp ", sdir) ;
+    return 0 ;
+  }
+  umask(m) ;
+  sdir[repolen + 15] = '/' ;
+  sdir[repolen + 20] = 0 ;
+  for (uint16_t i = 0 ; i < n ; i++)
+  {
+    uint160_xfmt(sdir + repolen + 16, i, 4) ;
+    if (symlink(stores[i], sdir) == -1)
+    {
+      strerr_warnfu4sys("symlink ", stores[i], " to ", sdir) ;
+      sdir[repolen + 15] = 0 ;
+      goto err ;
+    }
+  }
+  sdir[repolen + 15] = 0 ;
+  if (chmod(sdir, 02755) == -1)
+  {
+    strerr_warnfu2sys("chmod ", sdir) ;
+    goto err ;
+  }
+  if (!atomic_symlink4(sdir + repolen + 1, slink, sold, 15))
+  {
+    strerr_warnfu4sys("atomically symlink ", sdir + repolen + 1, " to ", slink) ;
+    goto err ;
+  }
+  return 1 ;
+
+ err:
+  rm_rf(sdir) ;
+  return 0 ;
+}