From 89b7b67a13ebb7965cc7f13ad0595e2194a2d34c Mon Sep 17 00:00:00 2001
From: Jannis Hoffmann <jannis@fehcom.de>
Date: Wed, 3 Jul 2024 15:48:04 +0200
Subject: add sqmail-4.2.29a

---
 src/qmail-start.c | 165 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 165 insertions(+)
 create mode 100644 src/qmail-start.c

(limited to 'src/qmail-start.c')

diff --git a/src/qmail-start.c b/src/qmail-start.c
new file mode 100644
index 0000000..7a7342c
--- /dev/null
+++ b/src/qmail-start.c
@@ -0,0 +1,165 @@
+#include <unistd.h>
+#include <sys/stat.h>
+#include "fd.h"
+#include "prot.h"
+#include "exit.h"
+#include "auto_uids.h"
+
+char *(qsargs[]) = { "qmail-send", 0 };
+char *(qcargs[]) = { "qmail-clean", 0 };
+char *(qlargs[]) = { "qmail-lspawn", "./Mailbox", 0 };
+char *(qrargs[]) = { "qmail-rspawn", 0 };
+char *(qtargs[]) = { "qmail-todo", 0};
+
+void die() { _exit(111); }
+
+int pi0[2];
+int pi1[2];
+int pi2[2];
+int pi3[2];
+int pi4[2];
+int pi5[2];
+int pi6[2];
+int pi7[2];
+int pi8[2];
+int pi9[2];
+int pi10[2];
+
+void closefds() 
+{ 
+  close(2); close(3); close(4); close(5); close(6); 
+  close(7); close(8);
+}
+
+void closepipes() 
+{
+  close(pi1[0]); close(pi1[1]); close(pi2[0]); close(pi2[1]);
+  close(pi3[0]); close(pi3[1]); close(pi4[0]); close(pi4[1]);
+  close(pi5[0]); close(pi5[1]); close(pi6[0]); close(pi6[1]);
+  close(pi7[0]); close(pi7[1]); close(pi8[0]); close(pi8[1]);
+  close(pi9[0]); close(pi9[1]); close(pi10[0]); close(pi10[1]);
+}
+
+int main(int argc,char **argv)
+{
+  if (chdir("/") == -1) die();
+  umask(077);
+  if (prot_gid(auto_gidq) == -1) die();
+
+  if (fd_copy(2,0) == -1) die();
+  if (fd_copy(3,0) == -1) die();
+  if (fd_copy(4,0) == -1) die();
+  if (fd_copy(5,0) == -1) die();
+  if (fd_copy(6,0) == -1) die();
+  if (fd_copy(7,0) == -1) die();
+  if (fd_copy(8,0) == -1) die();
+
+  if (argv[1]) {
+    qlargs[1] = argv[1];
+    ++argv;
+  }
+
+  if (argv[1]) {
+    if (pipe(pi0) == -1) die();
+    switch (fork()) {
+      case -1:
+        die();
+      case 0:
+        if (prot_gid(auto_gidn) == -1) die();
+        if (prot_uid(auto_uidl) == -1) die();
+        close(pi0[1]);
+        if (fd_move(0,pi0[0]) == -1) die();
+        closefds();
+        execvp(argv[1],argv + 1);
+        die();
+    }
+    close(pi0[0]);
+    if (fd_move(1,pi0[1]) == -1) die();
+  }
+ 
+  if (pipe(pi1) == -1) die();
+  if (pipe(pi2) == -1) die();
+  if (pipe(pi3) == -1) die();
+  if (pipe(pi4) == -1) die();
+  if (pipe(pi5) == -1) die();
+  if (pipe(pi6) == -1) die();
+  if (pipe(pi7) == -1) die();
+  if (pipe(pi8) == -1) die();
+  if (pipe(pi9) == -1) die();
+  if (pipe(pi10) == -1) die();
+ 
+  switch (fork()) {
+    case -1: die();
+    case 0:
+      if (fd_copy(0,pi1[0]) == -1) die();
+      if (fd_copy(1,pi2[1]) == -1) die();
+      closefds();
+      closepipes();
+      execvp(*qlargs,qlargs);
+      die();
+  }
+ 
+  switch (fork()) {
+    case -1: die();
+    case 0:
+      if (prot_uid(auto_uidr) == -1) die();
+      if (fd_copy(0,pi3[0]) == -1) die();
+      if (fd_copy(1,pi4[1]) == -1) die();
+      closefds();
+      closepipes();
+      execvp(*qrargs,qrargs);
+      die();
+  }
+ 
+  switch (fork()) {
+    case -1: die();
+    case 0:
+      if (prot_uid(auto_uidq) == -1) die();
+      if (fd_copy(0,pi5[0]) == -1) die();
+      if (fd_copy(1,pi6[1]) == -1) die();
+      closefds();
+      closepipes();
+      execvp(*qcargs,qcargs);
+      die();
+  }
+
+  switch (fork()) {
+    case -1: die();
+    case 0:
+      if (prot_uid(auto_uids) == -1) die();
+      if (fd_copy(0,pi7[0]) == -1) die();
+      if (fd_copy(1,pi8[1]) == -1) die();
+      closefds();
+      if (fd_copy(2,pi9[1]) == -1) die();
+      if (fd_copy(3,pi10[0]) == -1) die();
+      closepipes();
+      execvp(*qtargs,qtargs);
+      die();
+  }
+
+  switch (fork()) {
+    case -1: die();
+    case 0:
+      if (prot_uid(auto_uidq) == -1) die();
+      if (fd_copy(0,pi9[0]) == -1) die();
+      if (fd_copy(1,pi10[1]) == -1) die();
+      closefds();
+      closepipes();
+      execvp(*qcargs,qcargs);
+      die();
+  }
+ 
+  if (prot_uid(auto_uids) == -1) die();
+  if (fd_copy(0,1) == -1) die();
+  if (fd_copy(1,pi1[1]) == -1) die();
+  if (fd_copy(2,pi2[0]) == -1) die();
+  if (fd_copy(3,pi3[1]) == -1) die();
+  if (fd_copy(4,pi4[0]) == -1) die();
+  if (fd_copy(5,pi5[1]) == -1) die();
+  if (fd_copy(6,pi6[0]) == -1) die();
+  if (fd_copy(7,pi7[1]) == -1) die();
+  if (fd_copy(8,pi8[0]) == -1) die();
+  closepipes();
+  execvp(*qsargs,qsargs);
+  die();
+}
-- 
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