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-rwxr-xr-xmkdep.pl283
1 files changed, 283 insertions, 0 deletions
diff --git a/mkdep.pl b/mkdep.pl
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+#!/usr/bin/env perl
+#
+# Copyright (c) 2011-2017 Todd C. Miller <Todd.Miller@sudo.ws>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+#
+
+use File::Temp qw/ :mktemp /;
+use Fcntl;
+use warnings;
+
+die "usage: $0 [--builddir=dir] [--srcdir=dir] Makefile.in ...\n" unless $#ARGV >= 0;
+
+my @incpaths;
+my %dir_vars;
+my %implicit;
+my %generated;
+my $top_builddir = ".";
+my $top_srcdir;
+
+# Check for srcdir and/or builddir, if present
+while ($ARGV[0] =~ /^--(src|build)dir=(.*)/) {
+ if ($1 eq 'src') {
+ $top_srcdir = $2;
+ } else {
+ $top_builddir = $2;
+ }
+ shift @ARGV;
+}
+chdir($top_srcdir) if defined($top_srcdir);
+
+# Read in MANIFEST or fail if not present
+my %manifest;
+die "unable to open MANIFEST: $!\n" unless open(MANIFEST, "<MANIFEST");
+while (<MANIFEST>) {
+ chomp;
+ next unless /([^\/]+\.[cly])$/;
+ $manifest{$1} = $_;
+}
+
+foreach (@ARGV) {
+ mkdep($_);
+}
+
+sub fmt_depend {
+ my ($obj, $src) = @_;
+ my $ret;
+
+ my $deps = sprintf("%s: %s %s", $obj, $src,
+ join(' ', find_depends($src)));
+ if (length($deps) > 80) {
+ my $off = 0;
+ my $indent = length($obj) + 2;
+ while (length($deps) - $off > 80 - $indent) {
+ my $pos;
+ if ($off != 0) {
+ $ret .= ' ' x $indent;
+ $pos = rindex($deps, ' ', $off + 80 - $indent - 2);
+ } else {
+ $pos = rindex($deps, ' ', $off + 78);
+ }
+ $ret .= substr($deps, $off, $pos - $off) . " \\\n";
+ $off = $pos + 1;
+ }
+ $ret .= ' ' x $indent;
+ $ret .= substr($deps, $off) . "\n";
+ } else {
+ $ret = "$deps\n";
+ }
+
+ $ret;
+}
+
+sub mkdep {
+ my $file = $_[0];
+ $file =~ s:^\./+::; # strip off leading ./
+
+ my $makefile;
+ if (open(MF, "<$file")) {
+ local $/; # enable "slurp" mode
+ $makefile = <MF>;
+ } else {
+ warn "$0: $file: $!\n";
+ return undef;
+ }
+ close(MF);
+
+ # New makefile, minus the autogenerated dependencies
+ my $separator = "# Autogenerated dependencies, do not modify";
+ my $new_makefile = $makefile;
+ $new_makefile =~ s/${separator}.*$//s;
+ $new_makefile .= "$separator\n";
+
+ # Old makefile, join lines with continuation characters
+ $makefile =~ s/\\\n//mg;
+
+ # Expand some configure bits
+ $makefile =~ s:\@DEV\@::g;
+ $makefile =~ s:\@COMMON_OBJS\@:aix.lo event_poll.lo event_select.lo:;
+ $makefile =~ s:\@SUDO_OBJS\@:openbsd.o preload.o selinux.o sesh.o solaris.o:;
+ $makefile =~ s:\@SUDOERS_OBJS\@:bsm_audit.lo linux_audit.lo ldap.lo ldap_util.lo ldap_conf.lo solaris_audit.lo sssd.lo:;
+ # XXX - fill in AUTH_OBJS from contents of the auth dir instead
+ $makefile =~ s:\@AUTH_OBJS\@:afs.lo aix_auth.lo bsdauth.lo dce.lo fwtk.lo getspwuid.lo kerb5.lo pam.lo passwd.lo rfc1938.lo secureware.lo securid5.lo sia.lo:;
+ $makefile =~ s:\@DIGEST\@:digest.lo digest_openssl.lo digest_gcrypt.lo:;
+ $makefile =~ s:\@LTLIBOBJS\@:arc4random.lo arc4random_uniform.lo closefrom.lo fnmatch.lo getaddrinfo.lo getcwd.lo getentropy.lo getgrouplist.lo getline.lo getopt_long.lo glob.lo inet_ntop_lo inet_pton.lo isblank.lo memrchr.lo memset_s.lo mksiglist.lo mksigname.lo mktemp.lo nanosleep.lo pw_dup.lo reallocarray.lo sha2.lo sig2str.lo siglist.lo signame.lo snprintf.lo strlcat.lo strlcpy.lo strndup.lo strnlen.lo strsignal.lo strtonum.lo utimens.lo vsyslog.lo pipe2.lo:;
+
+ # Parse OBJS lines
+ my %objs;
+ while ($makefile =~ /^[A-Z0-9_]*OBJS\s*=\s*(.*)/mg) {
+ foreach (split/\s+/, $1) {
+ next if /^\$[\(\{].*[\)\}]$/; # skip included vars for now
+ $objs{$_} = 1;
+ }
+ }
+
+ # Find include paths
+ @incpaths = ();
+ while ($makefile =~ /-I(\S+)/mg) {
+ push(@incpaths, $1) unless $1 eq ".";
+ }
+
+ # Check for generated files
+ if ($makefile =~ /GENERATED\s*=\s*(.+)$/m) {
+ foreach (split(/\s+/, $1)) {
+ $generated{$_} = 1;
+ }
+ }
+
+ # Values of srcdir, top_srcdir, top_builddir, incdir
+ %dir_vars = ();
+ $file =~ m:^(.*)/+[^/]+:;
+ $dir_vars{'srcdir'} = $1 || '.';
+ $dir_vars{'devdir'} = $dir_vars{'srcdir'};
+ $dir_vars{'authdir'} = $dir_vars{'srcdir'} . "/auth";
+ $dir_vars{'builddir'} = $top_builddir . "/" . $dir_vars{'srcdir'};
+ $dir_vars{'top_srcdir'} = '.';
+ #$dir_vars{'top_builddir'} = '.';
+ $dir_vars{'incdir'} = 'include';
+
+ # Find implicit rules for generated .o and .lo files
+ %implicit = ();
+ while ($makefile =~ /^\.[ci]\.(l?o|i|plog):\s*\n\t+(.*)$/mg) {
+ $implicit{$1} = $2;
+ }
+
+ # Find existing .o and .lo dependencies
+ my %old_deps;
+ while ($makefile =~ /^(\w+\.l?o):\s*(\S+\.c)/mg) {
+ $old_deps{$1} = $2;
+ }
+
+ # Sort files so we do .lo files first
+ foreach my $obj (sort keys %objs) {
+ next unless $obj =~ /(\S+)\.(l?o)$/;
+ if ($2 eq "o" && exists($objs{"$1.lo"})) {
+ # We have both .lo and .o files, only the .lo should be used
+ warn "$file: $obj should be $1.lo\n";
+ } else {
+ # Use old depenencies when mapping objects to their source.
+ # If no old depenency, use the MANIFEST file to find the source.
+ my $src = $1 . '.c';
+ my $ext = $2;
+ if (exists $old_deps{$obj}) {
+ $src = $old_deps{$obj};
+ } elsif (exists $manifest{$src}) {
+ $src = $manifest{$src};
+ foreach (sort { length($b) <=> length($a) } keys %dir_vars) {
+ next if $_ eq "devdir";
+ last if $src =~ s:^\Q$dir_vars{$_}/\E:\$\($_\)/:;
+ }
+ } else {
+ warn "$file: unable to find source for $obj\n";
+ }
+ my $imp = $implicit{$ext};
+ $imp =~ s/\$</$src/g;
+
+ my $deps = fmt_depend($obj, $src);
+ $new_makefile .= $deps;
+ $new_makefile .= "\t$imp\n";
+
+ # PVS Studio files (.i and .plog)
+ $imp = $implicit{"i"};
+ if (exists $implicit{"i"} && exists $implicit{"plog"}) {
+ $imp = $implicit{"i"};
+ $deps =~ s/\.l?o/.i/;
+ $new_makefile .= $deps;
+ $new_makefile .= "\t$imp\n";
+
+ $imp = $implicit{"plog"};
+ $imp =~ s/ifile=\$<; *//;
+ $imp =~ s/\$\$\{ifile\%i\}c/$src/;
+ $obj =~ /(.*)\.[a-z]+$/;
+ $new_makefile .= "${1}.plog: ${1}.i\n";
+ $new_makefile .= "\t$imp\n";
+ }
+ }
+ }
+
+ my $newfile = $file . ".new";
+ if (!open(MF, ">$newfile")) {
+ warn("cannot open $newfile: $!\n");
+ } else {
+ print MF $new_makefile || warn("cannot write $newfile: $!\n");
+ close(MF) || warn("cannot close $newfile: $!\n");;
+ rename($newfile, $file);
+ }
+}
+
+exit(0);
+
+sub find_depends {
+ my $src = $_[0];
+ my ($deps, $code, %headers);
+
+ if ($src !~ /\//) {
+ # generated file, local to build dir
+ $src = "$dir_vars{'builddir'}/$src";
+ }
+
+ # resolve $(srcdir) etc.
+ foreach (keys %dir_vars) {
+ $src =~ s/\$[\(\{]$_[\)\}]/$dir_vars{$_}/g;
+ }
+
+ # find open source file and find headers used by it
+ if (!open(FILE, "<$src")) {
+ warn "unable to open $src\n";
+ return "";
+ }
+ local $/; # enable "slurp" mode
+ $code = <FILE>;
+ close(FILE);
+
+ # find all headers
+ while ($code =~ /^#\s*include\s+["<](\S+)[">]/mg) {
+ my ($hdr, $hdr_path) = find_header($1);
+ if (defined($hdr)) {
+ $headers{$hdr} = 1;
+ # Look for other includes in the .h file
+ foreach (find_depends($hdr_path)) {
+ $headers{$_} = 1;
+ }
+ }
+ }
+
+ sort keys %headers;
+}
+
+# find the path to a header file
+# returns path or undef if not found
+sub find_header {
+ my $hdr = $_[0];
+
+ # Look for .h.in files in top_builddir and build dir
+ return ("\$(top_builddir\)/$hdr", "./${hdr}.in") if -r "./${hdr}.in";
+ return ("./$hdr", "$dir_vars{'srcdir'}/${hdr}.in") if -r "$dir_vars{'srcdir'}/${hdr}.in";
+
+ if (exists $generated{$hdr}) {
+ my $hdr_path = $dir_vars{'devdir'} . '/' . $hdr;
+ return ('$(devdir)/' . $hdr, $hdr_path) if -r $hdr_path;
+ }
+ foreach my $inc (@incpaths) {
+ my $hdr_path = "$inc/$hdr";
+ # resolve variables in include path
+ foreach (keys %dir_vars) {
+ next if $_ eq "devdir";
+ $hdr_path =~ s/\$[\(\{]$_[\)\}]/$dir_vars{$_}/g;
+ }
+ return ("$inc/$hdr", $hdr_path) if -r $hdr_path;
+ }
+
+ undef;
+}
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