Lots of work done, doesn't build yet, next commit will

- alias subsystem moved to s6
- config subsystem deleted
- new helpers subsystem, with a s6-frontend-helper-kill program
- new s6f_equote function, to execline-quote an argv
- started the adaptation to the new s6-rc functions, in progress

2 files changed, 32 insertions, 0 deletions

diff --git a/src/helpers/deps-exe/s6-frontend-helper-kill b/src/helpers/deps-exe/s6-frontend-helper-kill
new file mode 100644
index 0000000..e7187fe
--- /dev/null
+++ b/src/helpers/deps-exe/s6-frontend-helper-kill
@@ -0,0 +1 @@
+-lskarnet
diff --git a/src/helpers/s6-frontend-helper-kill.c b/src/helpers/s6-frontend-helper-kill.c
new file mode 100644
index 0000000..c217373
--- /dev/null
+++ b/src/helpers/s6-frontend-helper-kill.c
@@ -0,0 +1,31 @@
+/* ISC license. */
+
+#include <unistd.h>
+#include <signal.h>
+
+#include <skalibs/types.h>
+#include <skalibs/prog.h>
+#include <skalibs/strerr.h>
+
+#define USAGE "s6-frontend-helper-kill signal pid..."
+#define dieusage() strerr_dieusage(100, USAGE)
+
+int main (int argc, char const *const *argv)
+{
+  unsigned int sig ;
+  PROG = "s6-frontend-helper-kill" ;
+  if (argc-- < 3) dieusage() ;
+  argv++ ;
+  if (!uint0_scan(*argv++, &sig)) dieusage() ;
+  argc-- ;
+
+  pid_t pids[argc] ;
+  for (unsigned int i = 0 ; i < argc ; i++)
+    if (!pid0_scan(argv[i], pids + i))
+      strerr_dief1x(100, "pids must be numerical") ;
+
+  for (unsigned int i = 0 ; i < argc ; i++)
+    kill(sig, pids[i]) ;
+  
+  _exit(0) ;
+}