From 6432cead1941d5305bc2d7f22821ca8a98f43f78 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Fri, 24 Nov 2017 18:54:03 +0000
Subject:  Add skabus-rpc-daemon, skabus-rpcd and the skabus_rpc library

---
 src/rpc/skabus-rpc-daemon.c | 154 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 154 insertions(+)
 create mode 100644 src/rpc/skabus-rpc-daemon.c

(limited to 'src/rpc/skabus-rpc-daemon.c')

diff --git a/src/rpc/skabus-rpc-daemon.c b/src/rpc/skabus-rpc-daemon.c
new file mode 100644
index 0000000..20c5eea
--- /dev/null
+++ b/src/rpc/skabus-rpc-daemon.c
@@ -0,0 +1,154 @@
+/* ISC license. */
+
+#include <sys/types.h>
+#include <limits.h>
+#include <skalibs/types.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/djbunix.h>
+#include <s6/config.h>
+#include <skabus/config.h>
+
+#define USAGE "skabus-rpc-daemon [ -v verbosity ] [ -d | -D ] [ -1 ] [ -c maxconn ] [ -b backlog ] [ -G gid,gid,... ] [ -g gid ] [ -u uid ] [ -U ] [ -t timeout ] [ -T lameducktimeout ] [ -i rulesdir | -x rulesfile ] [ -S | -s ] [ -J | -j ] path"
+#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 flagreuse = 1 ;
+  uid_t uid = 0 ;
+  gid_t gid = 0 ;
+  gid_t gids[NGROUPS_MAX] ;
+  size_t gidn = (unsigned int)-1 ;
+  unsigned int maxconn = 0 ;
+  unsigned int backlog = (unsigned int)-1 ;
+  int flagpublic = 0 ;
+  int flagifpublic = 0 ;
+  unsigned int timeout = 0 ;
+  unsigned int ltimeout = 0 ;
+  char const *rulesdir = 0 ;
+  char const *rulesfile = 0 ;
+  PROG = "skabus-rpc-daemon" ;
+  {
+    subgetopt_t l = SUBGETOPT_ZERO ;
+    for (;;)
+    {
+      register int opt = subgetopt_r(argc, argv, "Dd1USsJjv:c:b:u:g:G:t:T:i:x:", &l) ;
+      if (opt == -1) break ;
+      switch (opt)
+      {
+        case 'D' : flagreuse = 0 ; break ;
+        case 'd' : flagreuse = 1 ; break ;
+        case '1' : flag1 = 1 ; break ;
+        case 'v' : if (!uint0_scan(l.arg, &verbosity)) dieusage() ; break ;
+        case 'c' : if (!uint0_scan(l.arg, &maxconn)) dieusage() ; if (!maxconn) maxconn = 1 ; break ;
+        case 'b' : if (!uint0_scan(l.arg, &backlog)) dieusage() ; break ;
+        case 'u' : if (!uid0_scan(l.arg, &uid)) dieusage() ; break ;
+        case 'g' : if (!gid0_scan(l.arg, &gid)) dieusage() ; break ;
+        case 'G' : if (!gid_scanlist(gids, NGROUPS_MAX, l.arg, &gidn) && *l.arg) dieusage() ; break ;
+        case 'U' : flagU = 1 ; uid = 0 ; gid = 0 ; gidn = (size_t)-1 ; break ;
+        case 'S' : flagpublic = 0 ; break ;
+        case 's' : flagpublic = 1 ; break ;
+        case 'J' : flagifpublic = 0 ; break ;
+        case 'j' : flagifpublic = 1 ; break ;
+        case 't' : if (!uint0_scan(l.arg, &timeout)) dieusage() ; break ;
+        case 'T' : if (!uint0_scan(l.arg, &ltimeout)) dieusage() ; break ;
+        case 'i' : rulesdir = l.arg ; rulesfile = 0 ; break ;
+        case 'x' : rulesfile = l.arg ; rulesdir = 0 ; break ;
+        default : dieusage() ;
+      }
+    }
+    argc -= l.ind ; argv += l.ind ;
+    if (!argc) dieusage() ;
+  }
+
+  {
+    unsigned int m = 0, pos = 0 ;
+    char const *newargv[30] ;
+    char fmt[UINT_FMT * 6 + UID_FMT + GID_FMT * (1 + NGROUPS_MAX)] ;
+    newargv[m++] = S6_EXTBINPREFIX "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 != (size_t)-1)
+    {
+      newargv[m++] = S6_EXTBINPREFIX "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 != (size_t)-1)
+      {
+        newargv[m++] = "-G" ;
+        newargv[m++] = fmt + pos ;
+        pos += gid_fmtlist(fmt + pos, gids, gidn) ;
+        fmt[pos++] = 0 ;
+      }
+      newargv[m++] = "--" ;
+    }
+    newargv[m++] = SKABUS_BINPREFIX "skabus-rpcd" ;
+    if (verbosity != 1)
+    {
+      newargv[m++] = "-v" ;
+      newargv[m++] = fmt + pos ;
+      pos += uint_fmt(fmt + pos, verbosity) ;
+      fmt[pos++] = 0 ;
+    }
+    if (flag1) newargv[m++] = "-1" ;
+    if (flagpublic) newargv[m++] = "-s" ;
+    if (flagifpublic) newargv[m++] = "-j" ;
+    if (maxconn)
+    {
+      newargv[m++] = "-c" ;
+      newargv[m++] = fmt + pos ;
+      pos += uint_fmt(fmt + pos, maxconn) ;
+      fmt[pos++] = 0 ;
+    }
+    if (timeout)
+    {
+      newargv[m++] = "-t" ;
+      newargv[m++] = fmt + pos ;
+      pos += uint_fmt(fmt + pos, timeout) ;
+      fmt[pos++] = 0 ;
+    }
+    if (ltimeout)
+    {
+      newargv[m++] = "-T" ;
+      newargv[m++] = fmt + pos ;
+      pos += uint_fmt(fmt + pos, timeout) ;
+      fmt[pos++] = 0 ;
+    }
+    if (rulesdir)
+    {
+      newargv[m++] = "-i" ;
+      newargv[m++] = rulesdir ;
+    }
+    else if (rulesfile)
+    {
+      newargv[m++] = "-x" ;
+      newargv[m++] = rulesfile ;
+    }
+    newargv[m++] = 0 ;
+    xpathexec_run(newargv[0], newargv, envp) ;
+  }
+}
-- 
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