From 87c5b2118efcee65eeda3f743d081ea9c2b866d9 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Thu, 15 Jan 2015 20:14:44 +0000
Subject:  Move Unix domain utilities and access control utilites, as well as
 the accessrules library, from s6-networking to here

---
 src/conn-tools/s6-ipcserver.c | 127 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 src/conn-tools/s6-ipcserver.c

(limited to 'src/conn-tools/s6-ipcserver.c')

diff --git a/src/conn-tools/s6-ipcserver.c b/src/conn-tools/s6-ipcserver.c
new file mode 100644
index 0000000..ccc76f6
--- /dev/null
+++ b/src/conn-tools/s6-ipcserver.c
@@ -0,0 +1,127 @@
+/* ISC license. */
+
+#include <sys/types.h>
+#include <limits.h>
+#include <skalibs/uint.h>
+#include <skalibs/gidstuff.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/djbunix.h>
+#include <s6/config.h>
+
+#define USAGE "s6-ipcserver [ -q | -Q | -v ] [ -d | -D ] [ -P | -p ] [ -1 ] [ -c maxconn ] [ -C localmaxconn ] [ -b backlog ] [ -G gid,gid,... ] [ -g gid ] [ -u uid ] [ -U ] path prog..."
+#define dieusage() strerr_dieusage(100, USAGE)
+
+int main (int argc, char const *const *argv, char const *const *envp)
+{
+  unsigned int verbosity = 1 ;
+  int flag1 = 0 ;
+  int flagU = 0 ;
+  int flaglookup = 1 ;
+  int flagreuse = 1 ;
+  unsigned int uid = 0, gid = 0 ;
+  gid_t gids[NGROUPS_MAX] ;
+  unsigned int gidn = (unsigned int)-1 ;
+  unsigned int maxconn = 0 ;
+  unsigned int localmaxconn = 0 ;
+  unsigned int backlog = (unsigned int)-1 ;
+  PROG = "s6-ipcserver" ;
+  {
+    subgetopt_t l = SUBGETOPT_ZERO ;
+    for (;;)
+    {
+      register int opt = subgetopt_r(argc, argv, "qQvDd1UPpc:C:b:u:g:G:", &l) ;
+      if (opt == -1) break ;
+      switch (opt)
+      {
+        case 'q' : verbosity = 0 ; break ;
+        case 'Q' : verbosity = 1 ; break ;
+        case 'v' : verbosity = 2 ; break ;
+        case 'D' : flagreuse = 0 ; break ;
+        case 'd' : flagreuse = 1 ; break ;
+        case 'P' : flaglookup = 0 ; break ;
+        case 'p' : flaglookup = 1 ; break ;
+        case 'c' : if (!uint0_scan(l.arg, &maxconn)) dieusage() ; if (!maxconn) maxconn = 1 ; break ;
+        case 'C' : if (!uint0_scan(l.arg, &localmaxconn)) dieusage() ; if (!localmaxconn) localmaxconn = 1 ; break ;
+        case 'b' : if (!uint0_scan(l.arg, &backlog)) dieusage() ; break ;
+        case 'u' : if (!uint0_scan(l.arg, &uid)) dieusage() ; break ;
+        case 'g' : if (!uint0_scan(l.arg, &gid)) dieusage() ; break ;
+        case 'G' : if (!gid_scanlist(gids, NGROUPS_MAX, l.arg, &gidn) && *l.arg) dieusage() ; break ;
+        case '1' : flag1 = 1 ; break ;
+        case 'U' : flagU = 1 ; uid = 0 ; gid = 0 ; gidn = (unsigned int)-1 ; break ;
+        default : dieusage() ;
+      }
+    }
+    argc -= l.ind ; argv += l.ind ;
+    if (argc < 2) dieusage() ;
+  }
+
+  {
+    unsigned int m = 0 ;
+    unsigned int pos = 0 ;
+    char fmt[UINT_FMT * 5 + GID_FMT * NGROUPS_MAX] ;
+    char const *newargv[24 + argc] ;
+    newargv[m++] = S6_BINPREFIX "s6-ipcserver-socketbinder" ;
+    if (!flagreuse) newargv[m++] = "-D" ;
+    if (backlog != (unsigned int)-1)
+    {
+      newargv[m++] = "-b" ;
+      newargv[m++] = fmt + pos ;
+      pos += uint_fmt(fmt + pos, backlog) ;
+      fmt[pos++] = 0 ;
+    }
+    newargv[m++] = "--" ;
+    newargv[m++] = *argv++ ;
+    if (flagU || uid || gid || gidn != (unsigned int)-1)
+    {
+      newargv[m++] = S6_BINPREFIX "s6-applyuidgid" ;
+      if (flagU) newargv[m++] = "-Uz" ;
+      if (uid)
+      {
+        newargv[m++] = "-u" ;
+        newargv[m++] = fmt + pos ;
+        pos += uint_fmt(fmt + pos, uid) ;
+        fmt[pos++] = 0 ;
+      }
+      if (gid)
+      {
+        newargv[m++] = "-g" ;
+        newargv[m++] = fmt + pos ;
+        pos += uint_fmt(fmt + pos, gid) ;
+        fmt[pos++] = 0 ;
+      }
+      if (gidn != (unsigned int)-1)
+      {
+        newargv[m++] = "-G" ;
+        newargv[m++] = fmt + pos ;
+        pos += gid_fmtlist(fmt + pos, gids, gidn) ;
+        fmt[pos++] = 0 ;
+      }
+      newargv[m++] = "--" ;
+    }
+    newargv[m++] = S6_BINPREFIX "s6-ipcserverd" ;
+    if (!verbosity) newargv[m++] = "-v0" ;
+    else if (verbosity == 2) newargv[m++] = "-v2" ;
+    if (flag1) newargv[m++] = "-1" ;
+    if (!flaglookup) newargv[m++] = "-P" ;
+    if (maxconn)
+    {
+      newargv[m++] = "-c" ;
+      newargv[m++] = fmt + pos ;
+      pos += uint_fmt(fmt + pos, maxconn) ;
+      fmt[pos++] = 0 ;
+    }
+    if (localmaxconn)
+    {
+      newargv[m++] = "-C" ;
+      newargv[m++] = fmt + pos ;
+      pos += uint_fmt(fmt + pos, localmaxconn) ;
+      fmt[pos++] = 0 ;
+    }
+    newargv[m++] = "--" ;
+    while (*argv) newargv[m++] = *argv++ ;
+    newargv[m++] = 0 ;
+    pathexec_run(newargv[0], newargv, envp) ;
+    strerr_dieexec(111, newargv[0]) ;
+  }
+}
-- 
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