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-rw-r--r--src/include/s6/s6-supervise.h4
-rw-r--r--src/libs6/deps-lib/s61
-rw-r--r--src/libs6/s6_svc_lock_take.c28
-rw-r--r--src/supervision/s6-supervise.c2
4 files changed, 34 insertions, 1 deletions
diff --git a/src/include/s6/s6-supervise.h b/src/include/s6/s6-supervise.h
index f0b08e7..541c30d 100644
--- a/src/include/s6/s6-supervise.h
+++ b/src/include/s6/s6-supervise.h
@@ -5,6 +5,7 @@
#include <sys/types.h>
#include <skalibs/tai.h>
+#include <skalibs/djbunix.h>
#define S6_SUPERVISE_CTLDIR "supervise"
#define S6_SUPERVISE_EVENTDIR "event"
@@ -17,6 +18,9 @@ extern int s6_svc_write (char const *, char const *, size_t) ;
extern int s6_svc_writectl (char const *, char const *, char const *, size_t) ;
extern int s6_svc_main (int, char const *const *, char const *, char const *, char const *) ;
+extern int s6_svc_lock_take (char const *) ;
+#define s6_svc_lock_release(fdlock) lock_un(fdlock)
+
typedef struct s6_svstatus_s s6_svstatus_t, *s6_svstatus_t_ref ;
struct s6_svstatus_s
{
diff --git a/src/libs6/deps-lib/s6 b/src/libs6/deps-lib/s6
index ace5a05..5acb672 100644
--- a/src/libs6/deps-lib/s6
+++ b/src/libs6/deps-lib/s6
@@ -26,6 +26,7 @@ s6_accessrules_uidgid_cdb.o
s6_accessrules_uidgid_fs.o
s6_supervise_lock.o
s6_supervise_lock_mode.o
+s6_svc_lock_take.o
s6_svc_ok.o
s6_svc_write.o
s6_svc_writectl.o
diff --git a/src/libs6/s6_svc_lock_take.c b/src/libs6/s6_svc_lock_take.c
new file mode 100644
index 0000000..57830c0
--- /dev/null
+++ b/src/libs6/s6_svc_lock_take.c
@@ -0,0 +1,28 @@
+/* ISC license. */
+
+#include <sys/stat.h>
+#include <string.h>
+#include <errno.h>
+#include <skalibs/djbunix.h>
+#include <s6/s6-supervise.h>
+
+int s6_svc_lock_take (char const *dir)
+{
+ size_t dirlen = strlen(dir) ;
+ int fdlock ;
+ char lock[dirlen + sizeof(S6_SUPERVISE_CTLDIR) + 6] ;
+ memcpy(lock, dir, dirlen) ;
+ memcpy(lock + dirlen, "/" S6_SUPERVISE_CTLDIR, sizeof(S6_SUPERVISE_CTLDIR) + 1) ;
+ if ((mkdir(lock, S_IRWXU) < 0) && (errno != EEXIST)) return -1 ;
+ memcpy(lock + dirlen + sizeof(S6_SUPERVISE_CTLDIR), "/lock", 6) ;
+ fdlock = open_create(lock) ;
+ if (fdlock < 0) return -1 ;
+ if (coe(fdlock) < 0 || lock_ex(fdlock) < 0)
+ {
+ int e = errno ;
+ fd_close(fdlock) ;
+ errno = e ;
+ return -1 ;
+ }
+ return fdlock ;
+}
diff --git a/src/supervision/s6-supervise.c b/src/supervision/s6-supervise.c
index 7527668..71f247e 100644
--- a/src/supervision/s6-supervise.c
+++ b/src/supervision/s6-supervise.c
@@ -599,9 +599,9 @@ int main (int argc, char const *const *argv)
memcpy(progname + proglen + 1, argv[1], namelen + 1) ;
PROG = progname ;
if (!fd_sanitize()) strerr_diefu1sys(111, "sanitize stdin and stdout") ;
- x[1].fd = s6_supervise_lock(S6_SUPERVISE_CTLDIR) ;
if (!ftrigw_fifodir_make(S6_SUPERVISE_EVENTDIR, getegid(), 0))
strerr_diefu2sys(111, "mkfifodir ", S6_SUPERVISE_EVENTDIR) ;
+ x[1].fd = s6_supervise_lock(S6_SUPERVISE_CTLDIR) ;
x[0].fd = selfpipe_init() ;
if (x[0].fd == -1) strerr_diefu1sys(111, "init selfpipe") ;
if (sig_ignore(SIGPIPE) < 0) strerr_diefu1sys(111, "ignore SIGPIPE") ;