From 36491e787c8be5b32b93f5c3b20edd9aa9d4c4e9 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Mon, 2 Feb 2026 18:01:03 +0000
Subject:  More qmail-smtpc stuff

---
 src/qmail-smtpc/qmailr_control.c | 81 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 src/qmail-smtpc/qmailr_control.c

(limited to 'src/qmail-smtpc/qmailr_control.c')

diff --git a/src/qmail-smtpc/qmailr_control.c b/src/qmail-smtpc/qmailr_control.c
new file mode 100644
index 0000000..a46cb22
--- /dev/null
+++ b/src/qmail-smtpc/qmailr_control.c
@@ -0,0 +1,81 @@
+/* ISC license. */
+
+#include <stddef.h>
+#include <errno.h>
+
+#include <skalibs/types.h>
+#include <skalibs/allreadwrite.h>
+#include <skalibs/buffer.h>
+#include <skalibs/fmtscan.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/djbunix.h>
+
+#include "qmailr.h"
+
+#include <skalibs/posixishard.h>
+
+int qmailr_control_read (char const *file, stralloc *sa, size_t *pos)
+{
+  int fd = openc_readb(file) ;
+  if (fd == -1) return errno == ENOENT ? (errno = 0, 0) : -1 ;
+
+  char buf[4096] ;
+  size_t r = allread(fd, buf, 4096) ;
+  fd_close(fd) ;
+  if (r == 4096) return (errno = ENAMETOOLONG, -1) ;
+  if (!r) return 0 ;
+  if (buf[r-1] == '\n') r-- ;
+  if (!r) return 0 ;
+  if (!stralloc_readyplus(sa, r+1)) return -1 ;
+  *pos = sa->len ;
+  stralloc_catb(sa, buf, r) ; stralloc_0(sa) ;
+  return 1 ;
+}
+
+int qmailr_control_readint (char const *file, unsigned int *x, stralloc *sa)
+{
+  size_t pos ;
+  int r = qmailr_control_readfile(file, sa, &pos) ;
+  if (r <= 0) return r ;
+  sa->len = pos ;
+  if (!uint0_scan(sa->s + sa->len, x)) return (errno = EPROTO, 0) ;
+  return 1 ;
+}
+
+int qmailr_control_readiplist (char const *file, stralloc *ip4, stralloc *ip6)
+{
+  int fd = openc_readb(file) ;
+  if (fd == -1) return errno == ENOENT ? (errno = 0, 0) : -1 ;
+
+  size_t pos4 = ip4->len, pos6 = ip6->len ;
+  char buf[4096] ;
+  buffer b = BUFFER_INIT(&buffer_read, fd, buf, 4096) ;
+
+  for (;;)
+  {
+    char line[128] ;
+    char ip[16] ;
+    size_t len = 0 ;
+    int r = getlnmax(&b, line, 127, &len, '\n') ;
+    if (r == -1) goto err ;
+    if (!r) break ;
+    if (!len) continue ;
+    if (line[len-1] != '\n') line[len++] = '\n' ;
+    if (ip6_scan(line, ip) == len-1)
+    {
+      if (!stralloc_catb(ip6, ip, 16)) goto err ;
+    }
+    else if (ip4_scan(line, ip) == len-1)
+    {
+      if (!stralloc_catb(ip4, ip, 4)) goto err ;
+    }
+    else goto errinval ;
+  }
+  return 1 ;
+
+ errinval:
+  errno = EINVAL ;
+ err:
+  ip4->len = pos4 ; ip6->len = pos6 ;
+  return 0 ;
+}
-- 
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