├── .gitignore ├── autogen.sh ├── Makefile.am ├── template ├── configure.ac ├── findstatic.pl ├── src ├── filedesc.c └── main.c ├── coding-style.txt └── COPYING.Apache-2.0 /.gitignore: -------------------------------------------------------------------------------- 1 | *.cache 2 | *.log 3 | *.o 4 | -------------------------------------------------------------------------------- /autogen.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | set -e 4 | 5 | autoreconf --force --install --symlink --warnings=all 6 | 7 | args="\ 8 | --sysconfdir=/etc \ 9 | --localstatedir=/var \ 10 | --prefix=/usr \ 11 | --enable-silent-rules" 12 | 13 | ./configure CFLAGS="-g -O1 $CFLAGS" $args "$@" 14 | make clean 15 | -------------------------------------------------------------------------------- /Makefile.am: -------------------------------------------------------------------------------- 1 | EXTRA_DIST = COPYING.Apache-2.0 findstatic.pl 2 | 3 | AM_CFLAGS = -g -Wall -W -Wformat-security -D_FORTIFY_SOURCE=2 -fno-common 4 | 5 | bin_PROGRAMS = \ 6 | java 7 | 8 | java_SOURCES = \ 9 | src/main.c \ 10 | src/filedesc.c 11 | 12 | distclean-local: 13 | rm -rf aclocal.m4 ar-lib autom4te.cache config.guess config.h.in config.h.in~ config.sub configure depcomp install-sh ltmain.sh m4 Makefile.in missing compile 14 | 15 | 16 | install-exec-hook: 17 | perl ${top_srcdir}/findstatic.pl ${top_builddir}/src/*.o | grep -v Checking ||: 18 | 19 | -------------------------------------------------------------------------------- /template: -------------------------------------------------------------------------------- 1 | /* 2 | * usrbinjava -- java wrapper 3 | * 4 | * Copyright (C) 2015 Intel Corporation. 5 | * 6 | * This program is free software: you can redistribute it and/or modify 7 | * it under the terms of the GNU General Public License as published by 8 | * the Free Software Foundation, version 3, with OpenSSL-exception. 9 | * 10 | * Alternatively, you can chose to redistribute and/or modifiy this 11 | * software under the terms of the Apache-2.0 license as published 12 | * by the Apache Software Foundation. 13 | * 14 | * If you want to contribute code to this project using only one, 15 | * instead of both, of these licenses, you need to remove the other 16 | * license text from this file as part of your contribution. 17 | * 18 | * This program is distributed in the hope that it will be useful, 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 | * GNU General Public License for more details. 22 | * 23 | * You should have received a copy of the GNU General Public License 24 | * along with this program. If not, see . 25 | * Likewise, you should have received a copy of the Apache-2.0 license, 26 | * which can also be found at http://www.apache.org/licenses/LICENSE-2.0 27 | * 28 | * Authors: 29 | * Arjan van de Ven 30 | * 31 | */ 32 | 33 | #define _GNU_SOURCE 34 | #include 35 | #include 36 | #include 37 | #include 38 | #include 39 | 40 | -------------------------------------------------------------------------------- /configure.ac: -------------------------------------------------------------------------------- 1 | # -*- Autoconf -*- 2 | # Process this file with autoconf to produce a configure script. 3 | 4 | AC_PREREQ([2.66]) 5 | AC_INIT(usrbinjava, 2, dev@lists.clearlinux.org) 6 | AM_INIT_AUTOMAKE([foreign -Wall -W subdir-objects]) 7 | AM_SILENT_RULES([yes]) 8 | AC_PROG_CC 9 | AM_PROG_CC_C_O 10 | AC_LANG(C) 11 | AC_CONFIG_MACRO_DIR([m4]) 12 | AC_CONFIG_HEADERS([config.h]) 13 | 14 | have_coverage=no 15 | AC_ARG_ENABLE(coverage, AS_HELP_STRING([--enable-coverage], [enable test coverage])) 16 | if test "x$enable_coverage" = "xyes" ; then 17 | AC_CHECK_PROG(lcov_found, [lcov], [yes], [no]) 18 | if test "x$lcov_found" = xno ; then 19 | AC_MSG_ERROR([*** lcov support requested but the program was not found]) 20 | else 21 | lcov_version_major="`lcov --version | cut -d ' ' -f 4 | cut -d '.' -f 1`" 22 | lcov_version_minor="`lcov --version | cut -d ' ' -f 4 | cut -d '.' -f 2`" 23 | if test "$lcov_version_major" -eq 1 -a "$lcov_version_minor" -lt 10; then 24 | AC_MSG_ERROR([*** lcov version is too old. 1.10 required]) 25 | else 26 | have_coverage=yes 27 | AC_DEFINE([COVERAGE], [1], [Coverage enabled]) 28 | fi 29 | fi 30 | fi 31 | AM_CONDITIONAL([COVERAGE], [test "$have_coverage" = "yes"]) 32 | 33 | AC_CONFIG_FILES([Makefile]) 34 | AC_OUTPUT 35 | 36 | AC_MSG_RESULT([ 37 | $PACKAGE_NAME $VERSION 38 | ======== 39 | 40 | prefix: ${prefix} 41 | libdir: ${libdir} 42 | sysconfdir: ${sysconfdir} 43 | exec_prefix: ${exec_prefix} 44 | bindir: ${bindir} 45 | datarootdir: ${datarootdir} 46 | 47 | compiler: ${CC} 48 | cflags: ${CFLAGS} 49 | ldflags: ${LDFLAGS} 50 | ]) 51 | -------------------------------------------------------------------------------- /findstatic.pl: -------------------------------------------------------------------------------- 1 | #!/usr/bin/perl -w 2 | # find a list of fns and variables in the code that could be static 3 | # usually called with something like this: 4 | # findstatic.pl `find . -name "*.o"` 5 | # Andrew Tridgell 6 | 7 | use strict; 8 | 9 | # use nm to find the symbols 10 | my($saved_delim) = $/; 11 | undef $/; 12 | my($syms) = `nm -o @ARGV`; 13 | $/ = $saved_delim; 14 | 15 | my(@lines) = split(/\n/s, $syms); 16 | 17 | my(%def); 18 | my(%undef); 19 | my(%stype); 20 | 21 | my(%typemap) = ( 22 | "T" => "function", 23 | "C" => "uninitialised variable", 24 | "D" => "initialised variable" 25 | ); 26 | 27 | 28 | # parse the symbols into defined and undefined 29 | for (my($i)=0; $i <= $#lines; $i++) { 30 | my($line) = $lines[$i]; 31 | if ($line =~ /(.*):[a-f0-9]* ([TCD]) (.*)/) { 32 | my($fname) = $1; 33 | my($symbol) = $3; 34 | push(@{$def{$fname}}, $symbol); 35 | $stype{$symbol} = $2; 36 | } 37 | if ($line =~ /(.*):\s* U (.*)/) { 38 | my($fname) = $1; 39 | my($symbol) = $2; 40 | push(@{$undef{$fname}}, $symbol); 41 | } 42 | } 43 | 44 | # look for defined symbols that are never referenced outside the place they 45 | # are defined 46 | foreach my $f (keys %def) { 47 | print "Checking $f\n"; 48 | my($found_one) = 0; 49 | foreach my $s (@{$def{$f}}) { 50 | my($found) = 0; 51 | foreach my $f2 (keys %undef) { 52 | if ($f2 ne $f) { 53 | foreach my $s2 (@{$undef{$f2}}) { 54 | if ($s2 eq $s) { 55 | $found = 1; 56 | $found_one = 1; 57 | } 58 | } 59 | } 60 | } 61 | if ($found == 0) { 62 | my($t) = $typemap{$stype{$s}}; 63 | if ($s eq 'main') { 64 | # special case: main program 65 | $found_one = 1; 66 | } else { 67 | print " '$s' is unique to $f, should be static? ($t)\n"; 68 | } 69 | } 70 | } 71 | if ($found_one == 0) { 72 | print " all symbols in '$f' are unused (main program?)\n"; 73 | } 74 | } 75 | 76 | -------------------------------------------------------------------------------- /src/filedesc.c: -------------------------------------------------------------------------------- 1 | /* 2 | * Software Updater - client side 3 | * 4 | * Copyright © 2012-2015 Intel Corporation. 5 | * 6 | * This program is free software: you can redistribute it and/or modify 7 | * it under the terms of the GNU General Public License as published by 8 | * the Free Software Foundation, version 2 or later of the License. 9 | * 10 | * This program is distributed in the hope that it will be useful, 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | * GNU General Public License for more details. 14 | * 15 | * You should have received a copy of the GNU General Public License 16 | * along with this program. If not, see . 17 | * 18 | * Authors: 19 | * Arjan van de Ven 20 | * 21 | */ 22 | 23 | #define _GNU_SOURCE 24 | #include 25 | #include 26 | #include 27 | #include 28 | #include 29 | #include 30 | 31 | 32 | void dump_file_descriptor_leaks(void) 33 | { 34 | DIR *dir; 35 | struct dirent *entry; 36 | 37 | dir = opendir("/proc/self/fd"); 38 | if (!dir) 39 | return; 40 | 41 | while (1) { 42 | char *filename; 43 | char buffer[PATH_MAX + 1]; 44 | entry = readdir(dir); 45 | size_t size; 46 | if (!entry) 47 | break; 48 | if (strcmp(entry->d_name, ".") == 0) 49 | continue; 50 | if (strcmp(entry->d_name, "..") == 0) 51 | continue; 52 | /* skip stdin/out/err */ 53 | if (strcmp(entry->d_name, "0") == 0) 54 | continue; 55 | if (strcmp(entry->d_name, "1") == 0) 56 | continue; 57 | if (strcmp(entry->d_name, "2") == 0) 58 | continue; 59 | 60 | /* we hold an fd open, the one from opendir above */ 61 | sprintf(buffer, "%i", dirfd(dir)); 62 | if (strcmp(entry->d_name, buffer) == 0) 63 | continue; 64 | 65 | if (asprintf(&filename, "/proc/self/fd/%s", entry->d_name) <= 0) 66 | abort(); 67 | memset(&buffer, 0, sizeof(buffer)); 68 | size = readlink(filename, buffer, PATH_MAX); 69 | if (size) 70 | printf("Possible filedescriptor leak : %s (%s)", entry->d_name, buffer); 71 | free(filename); 72 | } 73 | 74 | closedir(dir); 75 | } 76 | -------------------------------------------------------------------------------- /coding-style.txt: -------------------------------------------------------------------------------- 1 | The formatting part of the coding style is easy; we follow the linux kernel 2 | style with one key exception: 3 | 4 | if/else statements ALWAYS have {}'s, even if there is only 1 statement. 5 | So 6 | 7 | if (foo) { 8 | bar(); 9 | } 10 | 11 | the reason for this is that this is both less error-prone, and easier to put 12 | temporary or permanent logging/etc statements inside the {}'s. 13 | 14 | 15 | 16 | 17 | 18 | A note on error handling 19 | ======================== 20 | The software in this project is system critical software, to a degree where 21 | failure really is not an option: 22 | 23 | The impact of the application failing is VERY SIGNIFICANT. 24 | 25 | For that reason, we need to take great care to get error handling robust, 26 | and not make some medium level issue worse by failing the whole system. 27 | 28 | 29 | Rule 1: In userspace, malloc() does not fail 30 | -------------------------------------------- 31 | (The Thiago rule of memory management) 32 | 33 | In userspace, malloc() simply does not fail. 34 | "But But". We have 47 bits of address space to fill before malloc() would fail 35 | due to being out of space. It just won't happen. 36 | 37 | Because of this, we're not going to check for, or handle, malloc() failures. 38 | For one, in practice all you can do is exit, and the next line after 39 | malloc() will crash the program with the same effect. 40 | 41 | And more than that, the error handling, that never will be used, complicates 42 | the program code enormously and is impossible to test, and thus impossible 43 | to get right. 44 | 45 | 46 | Rule 2: Deal gracefully with expected failures 47 | ---------------------------------------------- 48 | Some kind of errors are actually expected, normal conditions, and should be 49 | handled sensibly, business as usual. For example, the lack of configuration 50 | file should be handled silently by just using the system defaults. 51 | 52 | 53 | Rule 3: Correct unexpected failures 54 | ----------------------------------- 55 | Other kind of errors are not expected. These kind of errors must be *fixed* 56 | as part of the error handling, so that the system can return to an expected 57 | situation. Just passing the error up the call chain is rarely the right 58 | answer, that just passes the buck to a part of the software that knows even 59 | less about how to properly correct the failure. 60 | 61 | Example: If a configuration file was required, but none exists, the error 62 | handling for this scenario should include writing out a reference 63 | configuration file with default values filled in. 64 | 65 | Example: If you really want to handle a memory allocation failure, you must 66 | free at least as much memory as you tried to allocate to allow the system to 67 | make progress in its execution. 68 | -------------------------------------------------------------------------------- /src/main.c: -------------------------------------------------------------------------------- 1 | /* 2 | * usrbinjava - java wrapper 3 | * 4 | * Copyright (C) 2015 Intel Corporation. 5 | * 6 | * This program is free software: you can redistribute it and/or modify 7 | * it under the terms of the GNU General Public License as published by 8 | * the Free Software Foundation, version 3, with OpenSSL-exception. 9 | * 10 | * Alternatively, you can chose to redistribute and/or modifiy this 11 | * software under the terms of the Apache-2.0 license as published 12 | * by the Apache Software Foundation. 13 | * 14 | * If you want to contribute code to this project using only one, 15 | * instead of both, of these licenses, you need to remove the other 16 | * license text from this file as part of your contribution. 17 | * 18 | * This program is distributed in the hope that it will be useful, 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 | * GNU General Public License for more details. 22 | * 23 | * You should have received a copy of the GNU General Public License 24 | * along with this program. If not, see . 25 | * Likewise, you should have received a copy of the Apache-2.0 license, 26 | * which can also be found at http://www.apache.org/licenses/LICENSE-2.0 27 | * 28 | * Authors: 29 | * Arjan van de Ven 30 | * Athenas Jimenez 31 | * 32 | */ 33 | 34 | #define _GNU_SOURCE 35 | #include 36 | #include 37 | #include 38 | #include 39 | #include 40 | 41 | 42 | int main(int argc, char **argv) 43 | { 44 | char java[4096]; 45 | strcpy(java, "/usr/bin/false"); 46 | 47 | if (secure_getenv("JAVA_HOME")) { 48 | strcpy(java, secure_getenv("JAVA_HOME")); 49 | } 50 | else { 51 | if (access("/usr/lib/jvm/java-1.8.0-openjdk", F_OK) == 0) { 52 | strcpy(java, "/usr/lib/jvm/java-1.8.0-openjdk"); 53 | setenv("JAVA_HOME", "/usr/lib/jvm/java-1.8.0-openjdk", 0); 54 | } 55 | else { 56 | if (access("/usr/lib/jvm/java-1.11.0-openjdk", F_OK) == 0) { 57 | strcpy(java, "/usr/lib/jvm/java-1.11.0-openjdk"); 58 | setenv("JAVA_HOME", "/usr/lib/jvm/java-1.11.0-openjdk", 0); 59 | } 60 | else { 61 | if (access("/usr/lib/jvm/java-1.13.0-openjdk", F_OK) == 0) { 62 | strcpy(java, "/usr/lib/jvm/java-1.13.0-openjdk"); 63 | setenv("JAVA_HOME", "/usr/lib/jvm/java-1.13.0-openjdk", 0); 64 | } 65 | } 66 | } 67 | } 68 | 69 | strcat(java, "/bin/"); 70 | strncat(java, basename(argv[0]), 25); 71 | 72 | // If cannot access 73 | if (access(java, X_OK)) { 74 | fprintf(stderr, "Command not found at %s.\n", java); 75 | fprintf(stderr, "JAVA_HOME=%s\n", secure_getenv("JAVA_HOME")); 76 | return EXIT_FAILURE; 77 | } 78 | 79 | execvp(java, argv); 80 | return EXIT_SUCCESS; 81 | } 82 | -------------------------------------------------------------------------------- /COPYING.Apache-2.0: -------------------------------------------------------------------------------- 1 | 2 | Apache License 3 | Version 2.0, January 2004 4 | http://www.apache.org/licenses/ 5 | 6 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 7 | 8 | 1. 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