From 2c61fb1d1ce85fe400a8668e85fc0da42813a45a Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Fri, 23 Dec 2022 22:53:07 +0000
Subject:  Refactor libs6auto, add s6-instance-maker (untested)

Signed-off-by: Laurent Bercot <ska@appnovation.com>
---
 src/libs6/s6_auto_write_logrun_tmp.c | 68 ++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 src/libs6/s6_auto_write_logrun_tmp.c

(limited to 'src/libs6/s6_auto_write_logrun_tmp.c')

diff --git a/src/libs6/s6_auto_write_logrun_tmp.c b/src/libs6/s6_auto_write_logrun_tmp.c
new file mode 100644
index 0000000..24163fb
--- /dev/null
+++ b/src/libs6/s6_auto_write_logrun_tmp.c
@@ -0,0 +1,68 @@
+/* ISC license. */
+
+#include <string.h>
+
+#include <skalibs/posixplz.h>
+#include <skalibs/uint64.h>
+#include <skalibs/types.h>
+#include <skalibs/buffer.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/djbunix.h>
+#include <skalibs/skamisc.h>
+
+#include <execline/config.h>
+
+#include <s6/config.h>
+#include <s6/auto.h>
+
+int s6_auto_write_logrun_tmp (char const *runfile, char const *loguser, char const *logdir, unsigned int stamptype, unsigned int nfiles, uint64_t filesize, uint64_t maxsize, char const *prefix, stralloc *sa)
+{
+  buffer b ;
+  char buf[1024] ;
+  char fmt[UINT64_FMT] ;
+  int fd = open_trunc(runfile) ;
+  if (fd < 0) return 0 ;
+  buffer_init(&b, &buffer_write, fd, buf, 1024) ;
+  if (buffer_puts(&b, "#!" EXECLINE_SHEBANGPREFIX "execlineb -P\n") < 0) goto err ;
+  if (loguser)
+  {
+    if (buffer_puts(&b, S6_EXTBINPREFIX "s6-setuidgid ") < 0
+     || !string_quote(sa, loguser, strlen(loguser))
+     || buffer_put(&b, sa->s, sa->len) < 0
+     || buffer_put(&b, "\n", 1) < 0) goto err ;
+    sa->len = 0 ;
+  }
+  if (buffer_puts(&b, S6_EXTBINPREFIX "s6-log -bd3 -- ") < 0
+   || (stamptype & 1 && buffer_put(&b, "t ", 2) < 0)
+   || (stamptype & 2 && buffer_put(&b, "T ", 2) < 0)
+   || buffer_put(&b, "n", 1) < 0
+   || buffer_put(&b, fmt, uint_fmt(fmt, nfiles)) < 0
+   || buffer_put(&b, " s", 2) < 0
+   || buffer_put(&b, fmt, uint64_fmt(fmt, filesize)) < 0
+   || buffer_put(&b, " ", 1) < 0) goto err ;
+  if (maxsize)
+  {
+    if (buffer_put(&b, "S", 1) < 0
+     || buffer_put(&b, fmt, uint64_fmt(fmt, maxsize)) < 0
+     || buffer_put(&b, " ", 1) < 0) goto err ;
+  }
+  if (prefix)
+  {
+    if (buffer_put(&b, "p", 1) < 0
+     || buffer_puts(&b, prefix) < 0
+     || buffer_put(&b, " ", 1) < 0) goto err ;
+  }
+  if (!string_quote(sa, logdir, strlen(logdir))
+   || buffer_put(&b, sa->s, sa->len) < 0
+   || buffer_put(&b, "\n", 1) < 0) goto err ;
+  sa->len = 0 ;
+
+  if (!buffer_flush(&b)) goto err ;
+  fd_close(fd) ;
+  return 1 ;
+
+ err:
+  fd_close(fd) ;
+  unlink_void(runfile) ;
+  return 0 ;
+}
-- 
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