termux-packages/packages/shellinabox/shellinabox-2.20_shellinabox_launcher.c.patch

diff -uNr shellinabox-2.20/shellinabox/launcher.c shellinabox-2.20.mod/shellinabox/launcher.c
--- shellinabox-2.20/shellinabox/launcher.c	2016-11-09 21:40:33.000000000 +0200
+++ shellinabox-2.20.mod/shellinabox/launcher.c	2020-01-03 01:31:45.220824399 +0200
@@ -676,10 +676,13 @@
       // Temporarily regain privileges to update the utmp database
       uid_t r_uid, e_uid, s_uid;
       uid_t r_gid, e_gid, s_gid;
+
+#ifndef __ANDROID__
       check(!getresuid(&r_uid, &e_uid, &s_uid));
       check(!getresgid(&r_gid, &e_gid, &s_gid));
       UNUSED_RETURN(setresuid(0, 0, 0));
       UNUSED_RETURN(setresgid(0, 0, 0));
+#endif
 
       if (enableUtmpLogging) {
         setutxent();
@@ -693,10 +696,12 @@
 #endif
       }
 
+#ifndef __ANDROID__
       // Switch back to the lower privileges
       check(!setresgid(r_gid, e_gid, s_gid));
       check(!setresuid(r_uid, e_uid, s_uid));
 #endif
+#endif
 
       NOINTR(close(utmp->pty));
     }
@@ -1162,8 +1167,7 @@
 
   if (service->useDefaultShell) {
     check(!service->cmdline);
-    service->cmdline           = strdup(*pw->pw_shell ?
-                                        pw->pw_shell : "/bin/sh");
+    service->cmdline           = strdup("@TERMUX_PREFIX@/bin/bash");
   }
 
   if (restricted &&
@@ -1231,7 +1235,7 @@
   (*environment)[numEnvVars++] = stringPrintf(NULL, "SHELL=%s", pw->pw_shell);
   check(
   (*environment)[numEnvVars++] = strdup(
-                              "PATH=/usr/local/bin:/usr/bin:/bin:/usr/games"));
+                              "PATH=@TERMUX_PREFIX@/bin"));
   (*environment)[numEnvVars++] = stringPrintf(NULL, "LOGNAME=%s",
                                               service->user);
   (*environment)[numEnvVars++] = stringPrintf(NULL, "USER=%s", service->user);
@@ -1566,10 +1570,13 @@
   cfsetospeed(&tt, B38400);
   tcsetattr(0, TCSAFLUSH, &tt);
 
+#ifndef __ANDROID__
   // Assert root privileges in order to update utmp entry. We can only do that,
   // if we have root permissions otherwise this fails.
   UNUSED_RETURN(setresuid(0, 0, 0));
   UNUSED_RETURN(setresgid(0, 0, 0));
+#endif
+
 #ifdef HAVE_UTMPX_H
   if (enableUtmpLogging) {
     setutxent();
@@ -1641,9 +1648,11 @@
 #endif
   }
 
+#ifndef __ANDROID__
   // Change user and group ids
   check(!setresgid(service->gid, service->gid, service->gid));
   check(!setresuid(service->uid, service->uid, service->uid));
+#endif
 
   // Change working directory
   if (service->useHomeDir) {
@@ -1682,10 +1691,7 @@
     snprintf(remoteHost, 256,
              (*realIP) ? "%s, %s" : "%s%s", peerName,
              (*realIP) ? realIP : "");
-    execle("/bin/login", "login", "-p", "-h", remoteHost,
-           (void *)0, environment);
-    execle("/usr/bin/login", "login", "-p", "-h", remoteHost,
-           (void *)0, environment);
+    execle("@TERMUX_PREFIX@/bin/pwlogin", "pwlogin", (void *)0, environment);
   } else {
     // Launch user provied service
     execService(width, height, service, peerName, realIP, environment, url);