Add compat boilerplate

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

4 files changed, 93 insertions, 0 deletions

diff --git a/src/compat/deps-lib/pamela-compat b/src/compat/deps-lib/pamela-compat
new file mode 100644
index 0000000..d6fbe42
--- /dev/null
+++ b/src/compat/deps-lib/pamela-compat
@@ -0,0 +1,3 @@
+misc_conv.o
+pam_misc_drop_env.o
+pam_misc_paste_env.o
diff --git a/src/compat/misc_conv.c b/src/compat/misc_conv.c
new file mode 100644
index 0000000..23d23fb
--- /dev/null
+++ b/src/compat/misc_conv.c
@@ -0,0 +1,59 @@
+/* ISC license. */
+
+#include <string.h>
+#include <stdlib.h>
+#include <skalibs/allreadwrite.h>
+#include <skalibs/strerr.h>
+#include <skalibs/stralloc.h>
+#include <pamela/pam.h>
+#include <pamela/compat.h>
+
+/*
+static void freeres (struct pam_response *res, unsigned int n)
+{
+  while (n--) free(res[n].resp) ;
+  free(res) ;
+}
+*/
+
+static int getsa (int h, char const *msg, stralloc *sa)
+{
+  /* TODO: complete this */
+  return 0 ;
+}
+
+int misc_conv (int n, struct pam_message const **msg, struct pam_response **resp, void *aux)
+{
+  stralloc sa = STRALLOC_ZERO ;
+  struct pam_response *res ;
+  if (n <= 0) return PAM_CONV_ERR ;
+  res = malloc(n * sizeof(struct pam_response)) ;
+  if (!res) return PAM_CONV_ERR ;
+  for (unsigned int i = 0 ; i < n ; i++)
+  {
+    switch (msg[i]->msg_style)
+    {
+      case PAM_PROMPT_ECHO_OFF :
+        if (getsa(0, msg[i]->msg, &sa)) goto fail ;
+        break ;
+      case PAM_PROMPT_ECHO_ON :
+        if (getsa(1, msg[i]->msg, &sa)) goto fail ;
+        break ;
+      case PAM_ERROR_MSG :
+        strerr_warnw1x(msg[i]->msg) ;
+        break ;
+      case PAM_TEXT_INFO :
+      {
+        size_t len = strlen(msg[i]->msg) ;
+        if (allwrite(1, msg[i]->msg, len) < len) goto fail ;
+        break ;
+      }
+      case PAM_BINARY_PROMPT : /* TODO */
+        break ;
+    }
+  }
+  return 0 ;
+
+ fail:  /* TODO: check */
+  return -1 ;
+}
diff --git a/src/compat/pam_misc_drop_env.c b/src/compat/pam_misc_drop_env.c
new file mode 100644
index 0000000..a8a7564
--- /dev/null
+++ b/src/compat/pam_misc_drop_env.c
@@ -0,0 +1,17 @@
+/* ISC license. */
+
+#include <stdlib.h>
+#include <pamela/compat.h>
+
+static inline void env_free (char **envp)
+{
+  char **p = envp ;
+  while (*p) free(*p++) ;
+  free(envp) ;
+}
+
+char **pam_misc_drop_env (char **envp)
+{
+  env_free(envp) ;
+  return 0 ;
+}
diff --git a/src/compat/pam_misc_paste_env.c b/src/compat/pam_misc_paste_env.c
new file mode 100644
index 0000000..b70fd58
--- /dev/null
+++ b/src/compat/pam_misc_paste_env.c
@@ -0,0 +1,14 @@
+/* ISC license. */
+
+#include <pamela/pam.h>
+#include <pamela/compat.h>
+
+int pam_misc_paste_env (pam_handle_t *pamh, char const *const *envp)
+{
+  for (; *envp ; envp++)
+  {
+    int e = pam_putenv(pamh, *envp) ;
+    if (e != PAM_SUCCESS) return e ;
+  }
+  return PAM_SUCCESS ;
+}