From 3b9836248ed7f5164140d63e96ece21973fc43f7 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Tue, 21 Oct 2025 18:03:48 +0000
Subject:  add getserviceflags and use it in fillset; add some doc

---
 src/libs6rc/s6rc_repo_getserviceflags.c | 70 +++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 src/libs6rc/s6rc_repo_getserviceflags.c

(limited to 'src/libs6rc/s6rc_repo_getserviceflags.c')

diff --git a/src/libs6rc/s6rc_repo_getserviceflags.c b/src/libs6rc/s6rc_repo_getserviceflags.c
new file mode 100644
index 0000000..0ad68e7
--- /dev/null
+++ b/src/libs6rc/s6rc_repo_getserviceflags.c
@@ -0,0 +1,70 @@
+/* ISC license. */
+
+#include <sys/wait.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include <skalibs/posixplz.h>
+#include <skalibs/uint32.h>
+#include <skalibs/types.h>
+#include <skalibs/strerr.h>
+#include <skalibs/cspawn.h>
+#include <skalibs/djbunix.h>
+
+#include <s6-rc/config.h>
+#include <s6-rc/repo.h>
+
+#include <skalibs/posixishard.h>
+
+int s6rc_repo_getserviceflags (char const *repo, char const *name, uint32_t *flags)
+{
+  size_t repolen = strlen(repo) ;
+  ssize_t r ;
+  pid_t pid ;
+  int fd ;
+  int wstat ;
+  char flagstr[10] ;
+  char refdb[repolen + 15] ;
+  char const *argv[8] = { S6RC_BINPREFIX "s6-rc-db", "-c", refdb, "-b", "--", "flags", name, 0 } ;
+
+  memcpy(refdb, repo, repolen) ;
+  memcpy(refdb + repolen, "/compiled/.ref", 15) ;
+  pid = child_spawn1_pipe(argv[0], argv, (char const *const *)environ, &fd, 1) ;
+  if (!pid) { strerr_warnfu2sys("spawn ", argv[0]) ; return -1 ; }
+  r = readnclose(fd, flagstr, 10) ;
+  if (r != 9)
+  {
+    if (r == 10) goto err ;
+    else if (r >= 0) errno = EPIPE ;
+    strerr_warnfu2sys("read output from ", argv[0]) ;
+    return -1 ;
+  }
+  if (wait_pid(pid, &wstat) == -1)
+  {
+    strerr_warnfu2sys("wait for ", argv[0]) ;
+    return -1 ;
+  }
+  if (WIFSIGNALED(wstat))
+  {
+    char fmt[UINT_FMT] ;
+    fmt[uint_fmt(fmt, WTERMSIG(wstat))] = 0 ;
+     strerr_warnf3x(argv[0], " crashed with signal ", fmt) ;
+    return -1 ;
+  }
+  if (WEXITSTATUS(wstat))
+  {
+    char fmt[UINT_FMT] ;
+    fmt[uint_fmt(fmt, WEXITSTATUS(wstat))] = 0 ;
+    strerr_warnf3x(argv[0], " exited with code ", fmt) ;
+    return (WEXITSTATUS(wstat) < 99) - 1 ;
+  }
+  flagstr[8] = 0 ;
+  if (!uint320_xscan(flagstr, flags)) goto err ;
+  return 1 ;
+
+ err:
+  strerr_warnf2x("invalid output from ", S6RC_BINPREFIX "s6-rc-db") ;
+  errno = EPROTO ;
+  return -1 ;
+}
-- 
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