Annotation of embedaddon/sudo/mkdep.pl, revision 1.1.1.3

1.1       misho       1: #!/usr/bin/env perl
                      2: 
                      3: use File::Temp qw/ :mktemp  /;
                      4: use Fcntl;
                      5: use warnings;
                      6: 
                      7: die "usage: $0 Makefile ...\n" unless $#ARGV >= 0;
                      8: 
                      9: my @incpaths;
                     10: my %dir_vars;
                     11: my %implicit;
1.1.1.2   misho      12: my %generated;
1.1       misho      13: 
                     14: # Read in MANIFEST fail if present
                     15: my %manifest;
                     16: if (open(MANIFEST, "<MANIFEST")) {
                     17:     while (<MANIFEST>) {
                     18:        chomp;
                     19:        next unless /([^\/]+\.[cly])$/;
                     20:        $manifest{$1} = $_;
                     21:     }
                     22: }
                     23: 
                     24: foreach (@ARGV) {
                     25:     mkdep($_);
                     26: }
                     27: 
                     28: sub mkdep {
                     29:     my $file = $_[0];
                     30:     $file =~ s:^\./+::;                # strip off leading ./
                     31: 
                     32:     my $makefile;
                     33:     if (open(MF, "<$file")) {
                     34:        local $/;               # enable "slurp" mode
                     35:        $makefile = <MF>;
                     36:     } else {
                     37:        warn "$0: $file: $!\n";
                     38:        return undef;
                     39:     }
                     40:     close(MF);
                     41: 
                     42:     # New makefile, minus the autogenerated dependencies
                     43:     my $separator = "# Autogenerated dependencies, do not modify";
                     44:     my $new_makefile = $makefile;
                     45:     $new_makefile =~ s/${separator}.*$//s;
                     46:     $new_makefile .= "$separator\n";
                     47: 
                     48:     # Old makefile, join lines with continuation characters
                     49:     $makefile =~ s/\\\n//mg;
                     50: 
                     51:     # Expand some configure bits
1.1.1.2   misho      52:     $makefile =~ s:\@DEV\@::g;
1.1       misho      53:     $makefile =~ s:\@COMMON_OBJS\@:aix.lo:;
                     54:     $makefile =~ s:\@SUDO_OBJS\@:preload.o selinux.o sesh.o sudo_noexec.lo:;
1.1.1.3 ! misho      55:     $makefile =~ s:\@SUDOERS_OBJS\@:bsm_audit.lo linux_audit.lo ldap.lo plugin_error.lo sssd.lo:;
1.1       misho      56:     # XXX - fill in AUTH_OBJS from contents of the auth dir instead
1.1.1.2   misho      57:     $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:;
1.1.1.3 ! misho      58:     $makefile =~ s:\@LTLIBOBJS\@:closefrom.lo dlopen.lo fnmatch.lo getcwd.lo getgrouplist.lo getline.lo getprogname.lo glob.lo isblank.lo memrchr.lo mksiglist.lo mksigname.lo mktemp.lo nanosleep.lo pw_dup.lo sig2str.lo siglist.lo signame.lo snprintf.lo strlcat.lo strlcpy.lo strsignal.lo utimes.lo globtest.o fnm_test.o:;
1.1       misho      59: 
                     60:     # Parse OBJS lines
                     61:     my %objs;
                     62:     while ($makefile =~ /^[A-Z0-9_]*OBJS\s*=\s*(.*)/mg) {
                     63:        foreach (split/\s+/, $1) {
                     64:            next if /^\$[\(\{].*[\)\}]$/; # skip included vars for now
                     65:            $objs{$_} = 1;
                     66:        }
                     67:     }
                     68: 
                     69:     # Find include paths
                     70:     @incpaths = ();
                     71:     while ($makefile =~ /-I(\S+)/mg) {
                     72:        push(@incpaths, $1) unless $1 eq ".";
                     73:     }
                     74: 
1.1.1.2   misho      75:     # Check for generated files
                     76:     if ($makefile =~ /GENERATED\s*=\s*(.+)$/m) {
                     77:        foreach (split(/\s+/, $1)) {
                     78:            $generated{$_} = 1;
                     79:        }
                     80:     }
                     81: 
1.1       misho      82:     # Values of srcdir, top_srcdir, top_builddir, incdir
                     83:     %dir_vars = ();
                     84:     $file =~ m:^(.*)/+[^/]+:;
                     85:     $dir_vars{'srcdir'} = $1 || '.';
                     86:     $dir_vars{'devdir'} = $dir_vars{'srcdir'};
                     87:     $dir_vars{'authdir'} = $dir_vars{'srcdir'} . "/auth";
                     88:     $dir_vars{'top_srcdir'} = '.';
                     89:     #$dir_vars{'top_builddir'} = '.';
                     90:     $dir_vars{'incdir'} = 'include';
                     91: 
                     92:     # Find implicit rules for generate .o and .lo files
                     93:     %implicit = ();
                     94:     while ($makefile =~ /^\.c\.(l?o):\s*\n\t+(.*)$/mg) {
                     95:        $implicit{$1} = $2;
                     96:     }
                     97: 
                     98:     # Find existing .o and .lo dependencies
                     99:     my %old_deps;
                    100:     while ($makefile =~ /^(\w+\.l?o):\s*(\S+\.c)/mg) {
                    101:        $old_deps{$1} = $2;
                    102:     }
                    103: 
                    104:     # Sort files so we do .lo files first
                    105:     foreach my $obj (sort keys %objs) {
                    106:        next unless $obj =~ /(\S+)\.(l?o)$/;
                    107:        if ($2 eq "o" && exists($objs{"$1.lo"})) {
                    108:            # If we have both .lo and .o files, make the .o depend on the .lo
                    109:            $new_makefile .= sprintf("%s: %s.lo\n", $obj, $1);
                    110:        } else {
                    111:            # Use old depenencies when mapping objects to their source.
                    112:            # If no old depenency, use the MANIFEST file to find the source.
                    113:            my $src = $1 . '.c';
                    114:            my $ext = $2;
                    115:            if (exists $old_deps{$obj}) {
                    116:                $src = $old_deps{$obj};
                    117:            } elsif (exists $manifest{$src}) {
                    118:                $src = $manifest{$src};
                    119:                foreach (sort { length($b) <=> length($a) } keys %dir_vars) {
1.1.1.2   misho     120:                    next if $_ eq "devdir";
1.1       misho     121:                    last if $src =~ s:^\Q$dir_vars{$_}/\E:\$\($_\)/:;
                    122:                }
                    123:            } else {
                    124:                warn "$file: unable to find source for $obj\n";
                    125:            }
                    126:            my $imp = $implicit{$ext};
                    127:            $imp =~ s/\$</$src/g;
                    128: 
                    129:            my $deps = sprintf("%s: %s %s", $obj, $src,
                    130:                join(' ', find_depends($src)));
                    131:            if (length($deps) > 80) {
                    132:                my $off = 0;
                    133:                my $indent = length($obj) + 2;
                    134:                while (length($deps) - $off > 80 - $indent) {
                    135:                    my $pos;
                    136:                    if ($off != 0) {
                    137:                        $new_makefile .= ' ' x $indent;
                    138:                        $pos = rindex($deps, ' ', $off + 80 - $indent - 2);
                    139:                    } else {
                    140:                        $pos = rindex($deps, ' ', $off + 78);
                    141:                    }
                    142:                    $new_makefile .= substr($deps, $off, $pos - $off) . " \\\n";
                    143:                    $off = $pos + 1;
                    144:                }
                    145:                $new_makefile .= ' ' x $indent;
                    146:                $new_makefile .= substr($deps, $off) . "\n";
                    147:            } else {
                    148:                $new_makefile .= "$deps\n";
                    149:            }
                    150:            $new_makefile .= "\t$imp\n";
                    151:        }
                    152:     }
                    153: 
1.1.1.2   misho     154:     my $newfile = $file . ".new";
                    155:     if (!open(MF, ">$newfile")) {
                    156:        warn("cannot open $newfile: $!\n");
1.1       misho     157:     } else {
1.1.1.2   misho     158:        print MF $new_makefile || warn("cannot write $newfile: $!\n");
                    159:        close(MF) || warn("cannot close $newfile: $!\n");;
                    160:        rename($newfile, $file);
1.1       misho     161:     }
                    162: }
                    163: 
                    164: exit(0);
                    165: 
                    166: sub find_depends {
                    167:     my $src = $_[0];
                    168:     my ($deps, $code, @headers);
                    169: 
                    170:     if ($src !~ /\//) {
                    171:        # XXX - want build dir not src dir
                    172:        $src = "$dir_vars{'srcdir'}/$src";
                    173:     }
                    174: 
                    175:     # resolve $(srcdir) etc.
                    176:     foreach (keys %dir_vars) {
                    177:        $src =~ s/\$[\(\{]$_[\)\}]/$dir_vars{$_}/g;
                    178:     }
                    179: 
                    180:     # find open source file and find headers used by it
                    181:     if (!open(FILE, "<$src")) {
                    182:        warn "unable to open $src\n";
                    183:        return "";
                    184:     }
                    185:     local $/;          # enable "slurp" mode
                    186:     $code = <FILE>;
                    187:     close(FILE);
                    188: 
                    189:     # find all headers
                    190:     while ($code =~ /^#\s*include\s+["<](\S+)[">]/mg) {
                    191:        my ($hdr, $hdr_path) = find_header($1);
                    192:        if (defined($hdr)) {
                    193:            push(@headers, $hdr);
                    194:            # Look for other includes in the .h file
                    195:            push(@headers, find_depends($hdr_path));
                    196:        }
                    197:     }
                    198: 
                    199:     @headers;
                    200: }
                    201: 
                    202: # find the path to a header file
                    203: # returns path or undef if not found
                    204: sub find_header {
                    205:     my $hdr = $_[0];
                    206: 
                    207:     # Look for .h.in files in top_builddir and build dir
                    208:     return ("\$(top_builddir\)/$hdr", "./${hdr}.in") if -r "./${hdr}.in";
                    209:     return ("./$hdr", "$dir_vars{'srcdir'}/${hdr}.in") if -r "$dir_vars{'srcdir'}/${hdr}.in";
                    210: 
1.1.1.2   misho     211:     if (exists $generated{$hdr}) {
                    212:        my $hdr_path = $dir_vars{'devdir'} . '/' . $hdr;
                    213:        return ('$(devdir)/' . $hdr, $hdr_path) if -r $hdr_path;
                    214:     }
1.1       misho     215:     foreach my $inc (@incpaths) {
                    216:        my $hdr_path = "$inc/$hdr";
                    217:        # resolve variables in include path
                    218:        foreach (keys %dir_vars) {
1.1.1.2   misho     219:            next if $_ eq "devdir";
1.1       misho     220:            $hdr_path =~ s/\$[\(\{]$_[\)\}]/$dir_vars{$_}/g;
                    221:        }
                    222:        return ("$inc/$hdr", $hdr_path) if -r $hdr_path;
                    223:     }
                    224: 
                    225:     undef;
                    226: }

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