Run this command across the source:
perl -pi.bak -e 's/(20[012][0-9])-20[12][012]/$1-2023/g' `git ls-files`
and remove changes to po{,-docs}/*.po{,t} (these will be regenerated
later when we run 'make dist').
Only in end-user messages and documentation. This change was done
mostly mechanically using the Perl script attached below.
I also changed don't -> don’t etc and made some other simple fixes.
See also: https://www.cl.cam.ac.uk/~mgk25/ucs/quotes.html
----------
#!/usr/bin/perl -w
use strict;
use Locale::PO;
my $re = qr{'([-\w%.,=?*/]+)'};
my %files = ();
foreach my $filename ("po/libguestfs.pot", "po-docs/libguestfs-docs.pot") {
my $poref = Locale::PO->load_file_asarray($filename);
foreach my $po (@$poref) {
if ($po->msgid =~ $re) {
my @refs = split /\s+/, $po->reference;
foreach my $ref (@refs) {
my ($file, $lineno) = split /:/, $ref, 2;
$file =~ s{^\.\./}{};
if (exists $files{$file}) {
push @{$files{$file}}, $lineno;
} else {
$files{$file} = [$lineno];
}
}
}
}
}
foreach my $file (sort keys %files) {
unless (-w $file) {
warn "warning: $file is probably generated\n"; # have to edit generator
next;
}
my @lines = sort { $a <=> $b } @{$files{$file}};
#print "editing $file at lines ", join (", ", @lines), " ...\n";
open FILE, "<$file" or die "$file: $!";
my @all = ();
push @all, $_ while <FILE>;
close FILE;
my $ext = $file;
$ext =~ s/^.*\.//;
foreach (@lines) {
# Don't mess with verbatim sections in POD files.
next if $ext eq "pod" && $all[$_-1] =~ m/^ /;
unless ($all[$_-1] =~ $re) {
# this can happen for multi-line strings, have to edit it
# by hand
warn "warning: $file:$_ does not contain expected content\n";
next;
}
$all[$_-1] =~ s/$re/‘$1’/g;
}
rename "$file", "$file.bak";
open FILE, ">$file" or die "$file: $!";
print FILE $_ for @all;
close FILE;
my $mode = (stat ("$file.bak"))[2];
chmod ($mode & 0777, "$file");
}
Run the following command over the source:
perl -pi.bak -e 's/(20[01][0-9])-2016/$1-2017/g' `git ls-files`
(Thanks Rich for the perl snippet, as used in past years.)
Wherever we had code which did:
if (something_bad) {
perror (...);
exit (EXIT_FAILURE);
}
replace this with use of the error(3) function:
if (something_bad)
error (EXIT_FAILURE, errno, ...);
The error(3) function is supplied by glibc, or by gnulib on platforms
which don't have it, and is much more flexible than perror(3). Since
we already use error(3), there seems to be no downside to mandating it
everywhere.
Note there is one nasty catch with error(3): error (EXIT_SUCCESS, ...)
does *not* exit! This is also the reason why error(3) cannot be
marked as __attribute__((noreturn)).
Because the examples can't use gnulib, I did not change them.
To search for multiline patterns of the above form, pcregrep -M turns
out to be very useful:
pcregrep --buffer-size 10M -M '\bperror\b.*\n.*\bexit\b' `git ls-files`
GCC has two warnings related to large stack frames. We were already
using the -Wframe-larger-than warning, but this reduces the threshold
from 10000 to 5000 bytes.
However that warning only covers the static part of frames (not
alloca). So this change also enables -Wstack-usage=10000 which covers
both the static and dynamic usage (alloca and variable length arrays).
Multiple changes are made throughout the code to reduce frames to fit
within these new limits.
Note that stack allocation of large strings can be a security issue.
For example, we had code like:
size_t len = strlen (fs->windows_systemroot) + 64;
char software[len];
snprintf (software, len, "%s/system32/config/software",
fs->windows_systemroot);
where fs->windows_systemroot is guest controlled. It's not clear what
the effects might be of allowing the guest to allocate potentially
very large stack frames, but at best it allows the guest to cause
libguestfs to segfault. It turns out we are very lucky that
fs->windows_systemroot cannot be set arbitrarily large (see checks in
is_systemroot).
This commit changes those to large heap allocations instead.
Not to be confused with the libxml2 macro 'BAD_CAST' which converts
from 'signed char *' to 'unsigned char *'.
The 'bad_cast' function was defined and used all over the place as a
replacement for a '(char *)' cast. I think it is better to make these
casts explicit, instead of hiding them in an obscure function.
gettextize provides a local file called "gettext.h". Remove this and
use <libintl.h> from glibc headers instead.
Most of this change is mechanical: #include <libintl.h> in every C
file which uses any gettext function. But also we remove the
gettext.h file, and adjust the "_" macros.
Note that this effectively removes the ./configure --disable-nls
option, although we don't know if that ever worked.
Add 'event', 'list-events' and 'delete-event' commands so that event
handlers can be registered, listed and deleted in guestfish. The
event handler is a shell script snippet or host command.
Cc: Pádraig Brady <P@draigBrady.com>
