From 331d019eeb1104d4baa6af1d11ad228793b8d97f Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Sat, 14 Jun 2025 13:32:49 +0000
Subject:  Set up configurable policy infrastructure

Signed-off-by: Laurent Bercot <ska@appnovation.com>
---
 src/libs6f/deps-exe/s6f            |  1 +
 src/libs6f/s6f_user_get_confdirs.c | 77 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+)
 create mode 100644 src/libs6f/deps-exe/s6f
 create mode 100644 src/libs6f/s6f_user_get_confdirs.c

(limited to 'src/libs6f')

diff --git a/src/libs6f/deps-exe/s6f b/src/libs6f/deps-exe/s6f
new file mode 100644
index 0000000..e77c0cc
--- /dev/null
+++ b/src/libs6f/deps-exe/s6f
@@ -0,0 +1 @@
+s6f_user_get_confdirs.o
diff --git a/src/libs6f/s6f_user_get_confdirs.c b/src/libs6f/s6f_user_get_confdirs.c
new file mode 100644
index 0000000..57e6451
--- /dev/null
+++ b/src/libs6f/s6f_user_get_confdirs.c
@@ -0,0 +1,77 @@
+/* ISC license. */
+
+#include <pwd.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include <skalibs/types.h>
+#include <skalibs/strerr.h>
+#include <skalibs/stralloc.h>
+
+#include "s6-internal.h"
+
+#define dienomem() strerr_diefu1sys(111, "allocate memory")
+
+void s6f_user_get_confdirs (s6f_confdirs *dirs, stralloc *storage)
+{
+  size_t scanpos, livepos, repopos, bootpos ;
+  size_t homelen = 0 ;
+  struct passwd *pw = 0 ;
+  char const *home = 0 ;
+  char const *datahome = getenv("XDG_DATA_HOME") ;
+  char const *confighome = getenv("XDG_DATA_HOME") ;
+  char const *runtime = getenv("XDG_RUNTIME_DIR") ;
+  if (!runtime) strerr_dienotset(100, "XDG_RUNTIME_DIR") ;
+
+  if (!datahome || !confighome)
+  {
+    *home = getenv("HOME") ;
+    if (!home)
+    {
+      errno = 0 ;
+      pw = getpwuid(uid) ;
+      if (!pw)
+      {
+        char fmt[UID_FMT] ;
+        fmt[uid_fmt(fmt, uid)] = 0 ;
+        if (errno) strerr_diefu2sys(111, "getpwuid for user ", fmt) ;
+        else strerr_diefu3x(100, "getpwuid for user ", fmt, ": uid not found in passwd database") ;
+      }
+      homelen = strlen(pw->pw_dir) ;
+    }
+  }
+  char homeinstack[homelen + 1] ;
+  if (homelen)
+  {
+    memcpy(homeinstack, pw->pw_dir, homelen) ;
+    homestack[homelen] = 0 ;
+    home = homeinstack ;
+  }
+  
+  scanpos = storage->len ;
+  if (!stralloc_cats(storage, runtime)
+   || !stralloc_cats(storage, "/service")
+   || !stralloc_0(storage)) dienomem() ;
+
+  livepos = storage->len ;
+  if (!stralloc_cats(storage, runtime)
+   || !stralloc_cats(storage, "/s6-rc")
+   || !stralloc_0(storage)) dienomem() ;
+
+  repopos = storage.len ;
+  if (!(datahome ? stralloc_cats(storage, datahome) : stralloc_cats(storage, home) && stralloc_cats(storage, "/.local/share"))
+   || !stralloc_cats(storage, "/s6-frontend/repository")
+   || !stralloc_0(storage)) dienomem ;
+  
+  bootpos = storage.len ;
+  if (!(confighome ? stralloc_cats(storage, confighome) : stralloc_cats(storage, home) && stralloc_cats(storage, "/.config"))
+   || !stralloc_cats(storage, "/s6-rc")
+   || !stralloc_0(storage)) dienomem ;
+
+ /* Don't add to storage past this point */
+
+  dirs->scan = storage.s + scanpos ;
+
+}
-- 
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