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Avoid calling setgroups(2).
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Hardcode and do not require absolute path.
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diff -u -r ../openssh-7.2p1/sshd.c ./sshd.c
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--- ../openssh-7.2p1/sshd.c 2016-02-25 22:40:04.000000000 -0500
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+++ ./sshd.c 2016-02-29 02:36:00.863344328 -0500
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@@ -644,8 +644,10 @@
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debug3("privsep user:group %u:%u", (u_int)privsep_pw->pw_uid,
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(u_int)privsep_pw->pw_gid);
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gidset[0] = privsep_pw->pw_gid;
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+#ifndef __ANDROID__
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if (setgroups(1, gidset) < 0)
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fatal("setgroups: %.100s", strerror(errno));
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+#endif
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permanently_set_uid(privsep_pw);
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}
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}
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@@ -1487,7 +1489,8 @@
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saved_argc = ac;
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rexec_argc = ac;
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saved_argv = xcalloc(ac + 1, sizeof(*saved_argv));
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- for (i = 0; i < ac; i++)
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+ saved_argv[0] = "@TERMUX_PREFIX@/bin/sshd";
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+ for (i = 1; i < ac; i++)
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saved_argv[i] = xstrdup(av[i]);
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saved_argv[i] = NULL;
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@@ -1497,8 +1500,10 @@
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av = saved_argv;
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#endif
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+#ifndef __ANDROID__
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if (geteuid() == 0 && setgroups(0, NULL) == -1)
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debug("setgroups(): %.200s", strerror(errno));
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+#endif
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/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
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sanitise_stdfd();
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@@ -1628,8 +1633,6 @@
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}
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if (rexeced_flag || inetd_flag)
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rexec_flag = 0;
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- if (!test_flag && (rexec_flag && (av[0] == NULL || *av[0] != '/')))
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- fatal("sshd re-exec requires execution with an absolute path");
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if (rexeced_flag)
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closefrom(REEXEC_MIN_FREE_FD);
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else
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@@ -1764,7 +1767,9 @@
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free(privsep_pw->pw_passwd);
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privsep_pw->pw_passwd = xstrdup("*");
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}
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+#ifndef __ANDROID__
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endpwent();
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+#endif
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/* load host keys */
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sensitive_data.host_keys = xcalloc(options.num_host_key_files,
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@@ -1948,8 +1953,10 @@
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* to create a file, and we can't control the code in every
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* module which might be used).
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*/
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+#ifndef __ANDROID__
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if (setgroups(0, NULL) < 0)
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debug("setgroups() failed: %.200s", strerror(errno));
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+#endif
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if (rexec_flag) {
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rexec_argv = xcalloc(rexec_argc + 2, sizeof(char *));
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