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dispatch: protect against malicious 'hg serve --stdio' invocations (sec)...
dispatch: protect against malicious 'hg serve --stdio' invocations (sec) Some shared-ssh installations assume that 'hg serve --stdio' is a safe command to run for minimally trusted users. Unfortunately, the messy implementation of argument parsing here meant that trying to access a repo named '--debugger' would give the user a pdb prompt, thereby sidestepping any hoped-for sandboxing. Serving repositories over HTTP(S) is unaffected. We're not currently hardening any subcommands other than 'serve'. If your service exposes other commands to users with arbitrary repository names, it is imperative that you defend against repository names of '--debugger' and anything starting with '--config'. The read-only mode of hg-ssh stopped working because it provided its hook configuration to "hg serve --stdio" via --config parameter. This is banned for security reasons now. This patch switches it to directly call ui.setconfig(). If your custom hosting infrastructure relies on passing --config to "hg serve --stdio", you'll need to find a different way to get that configuration into Mercurial, either by using ui.setconfig() as hg-ssh does in this patch, or by placing an hgrc file someplace where Mercurial will read it. mitrandir@fb.com provided some extra fixes for the dispatch code and for hg-ssh in places that I overlooked.
Kostia Balytskyi - - Load All Authors

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r30460:ce3a133f default
r32050:77eaf953 4.1.3 stable
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test-merge-types.t
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#require symlink execbit
$ tellmeabout() {
> if [ -h $1 ]; then
> echo $1 is a symlink:
> $TESTDIR/readlink.py $1
> elif [ -x $1 ]; then
> echo $1 is an executable file with content:
> cat $1
> else
> echo $1 is a plain file with content:
> cat $1
> fi
> }
$ hg init test1
$ cd test1
$ echo a > a
$ hg ci -Aqmadd
$ chmod +x a
$ hg ci -mexecutable
$ hg up -q 0
$ rm a
$ ln -s symlink a
$ hg ci -msymlink
created new head
Symlink is local parent, executable is other:
$ hg merge --debug
searching for copies back to rev 1
resolving manifests
branchmerge: True, force: False, partial: False
ancestor: c334dc3be0da, local: 521a1e40188f+, remote: 3574f3e69b1c
preserving a for resolve of a
a: versions differ -> m (premerge)
picked tool ':merge' for a (binary False symlink True changedelete False)
merging a
my a@521a1e40188f+ other a@3574f3e69b1c ancestor a@c334dc3be0da
warning: internal :merge cannot merge symlinks for a
warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
[1]
$ tellmeabout a
a is a symlink:
a -> symlink
$ hg resolve a --tool internal:other
(no more unresolved files)
$ tellmeabout a
a is an executable file with content:
a
$ hg st
M a
? a.orig
Symlink is other parent, executable is local:
$ hg update -C 1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg merge --debug --tool :union
searching for copies back to rev 1
resolving manifests
branchmerge: True, force: False, partial: False
ancestor: c334dc3be0da, local: 3574f3e69b1c+, remote: 521a1e40188f
preserving a for resolve of a
a: versions differ -> m (premerge)
picked tool ':union' for a (binary False symlink True changedelete False)
merging a
my a@3574f3e69b1c+ other a@521a1e40188f ancestor a@c334dc3be0da
warning: internal :union cannot merge symlinks for a
warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
[1]
$ tellmeabout a
a is an executable file with content:
a
$ hg update -C 1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg merge --debug --tool :merge3
searching for copies back to rev 1
resolving manifests
branchmerge: True, force: False, partial: False
ancestor: c334dc3be0da, local: 3574f3e69b1c+, remote: 521a1e40188f
preserving a for resolve of a
a: versions differ -> m (premerge)
picked tool ':merge3' for a (binary False symlink True changedelete False)
merging a
my a@3574f3e69b1c+ other a@521a1e40188f ancestor a@c334dc3be0da
warning: internal :merge3 cannot merge symlinks for a
warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
[1]
$ tellmeabout a
a is an executable file with content:
a
$ hg update -C 1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg merge --debug --tool :merge-local
searching for copies back to rev 1
resolving manifests
branchmerge: True, force: False, partial: False
ancestor: c334dc3be0da, local: 3574f3e69b1c+, remote: 521a1e40188f
preserving a for resolve of a
a: versions differ -> m (premerge)
picked tool ':merge-local' for a (binary False symlink True changedelete False)
merging a
my a@3574f3e69b1c+ other a@521a1e40188f ancestor a@c334dc3be0da
warning: internal :merge-local cannot merge symlinks for a
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
[1]
$ tellmeabout a
a is an executable file with content:
a
$ hg update -C 1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg merge --debug --tool :merge-other
searching for copies back to rev 1
resolving manifests
branchmerge: True, force: False, partial: False
ancestor: c334dc3be0da, local: 3574f3e69b1c+, remote: 521a1e40188f
preserving a for resolve of a
a: versions differ -> m (premerge)
picked tool ':merge-other' for a (binary False symlink True changedelete False)
merging a
my a@3574f3e69b1c+ other a@521a1e40188f ancestor a@c334dc3be0da
warning: internal :merge-other cannot merge symlinks for a
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
[1]
$ tellmeabout a
a is an executable file with content:
a
Update to link without local change should get us a symlink (issue3316):
$ hg up -C 0
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg up
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
1 other heads for branch "default"
$ hg st
? a.orig
Update to link with local change should cause a merge prompt (issue3200):
$ hg up -Cq 0
$ echo data > a
$ HGMERGE= hg up -y --debug
searching for copies back to rev 2
resolving manifests
branchmerge: False, force: False, partial: False
ancestor: c334dc3be0da, local: c334dc3be0da+, remote: 521a1e40188f
preserving a for resolve of a
a: versions differ -> m (premerge)
(couldn't find merge tool hgmerge|tool hgmerge can't handle symlinks) (re)
picked tool ':prompt' for a (binary False symlink True changedelete False)
no tool found to merge a
keep (l)ocal [working copy], take (o)ther [destination], or leave (u)nresolved? u
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges
1 other heads for branch "default"
[1]
$ hg diff --git
diff --git a/a b/a
old mode 120000
new mode 100644
--- a/a
+++ b/a
@@ -1,1 +1,1 @@
-symlink
\ No newline at end of file
+data
Test only 'l' change - happens rarely, except when recovering from situations
where that was what happened.
$ hg init test2
$ cd test2
$ printf base > f
$ hg ci -Aqm0
$ echo file > f
$ echo content >> f
$ hg ci -qm1
$ hg up -qr0
$ rm f
$ ln -s base f
$ hg ci -qm2
$ hg merge
merging f
warning: internal :merge cannot merge symlinks for f
warning: conflicts while merging f! (edit, then use 'hg resolve --mark')
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
[1]
$ tellmeabout f
f is a symlink:
f -> base
$ hg up -Cqr1
$ hg merge
merging f
warning: internal :merge cannot merge symlinks for f
warning: conflicts while merging f! (edit, then use 'hg resolve --mark')
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
[1]
$ tellmeabout f
f is a plain file with content:
file
content
$ cd ..
Test removed 'x' flag merged with change to symlink
$ hg init test3
$ cd test3
$ echo f > f
$ chmod +x f
$ hg ci -Aqm0
$ chmod -x f
$ hg ci -qm1
$ hg up -qr0
$ rm f
$ ln -s dangling f
$ hg ci -qm2
$ hg merge
merging f
warning: internal :merge cannot merge symlinks for f
warning: conflicts while merging f! (edit, then use 'hg resolve --mark')
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
[1]
$ tellmeabout f
f is a symlink:
f -> dangling
$ hg up -Cqr1
$ hg merge
merging f
warning: internal :merge cannot merge symlinks for f
warning: conflicts while merging f! (edit, then use 'hg resolve --mark')
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
[1]
$ tellmeabout f
f is a plain file with content:
f
Test removed 'x' flag merged with content change - both ways
$ hg up -Cqr0
$ echo change > f
$ hg ci -qm3
$ hg merge -r1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ tellmeabout f
f is a plain file with content:
change
$ hg up -qCr1
$ hg merge -r3
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ tellmeabout f
f is a plain file with content:
change
$ cd ..
Test merge with no common ancestor:
a: just different
b: x vs -, different (cannot calculate x, cannot ask merge tool)
c: x vs -, same (cannot calculate x, merge tool is no good)
d: x vs l, different
e: x vs l, same
f: - vs l, different
g: - vs l, same
h: l vs l, different
(where same means the filelog entry is shared and there thus is an ancestor!)
$ hg init test4
$ cd test4
$ echo 0 > 0
$ hg ci -Aqm0
$ echo 1 > a
$ echo 1 > b
$ chmod +x b
$ echo 1 > bx
$ chmod +x bx
$ echo x > c
$ chmod +x c
$ echo 1 > d
$ chmod +x d
$ printf x > e
$ chmod +x e
$ echo 1 > f
$ printf x > g
$ ln -s 1 h
$ hg ci -qAm1
$ hg up -qr0
$ echo 2 > a
$ echo 2 > b
$ echo 2 > bx
$ chmod +x bx
$ echo x > c
$ ln -s 2 d
$ ln -s x e
$ ln -s 2 f
$ ln -s x g
$ ln -s 2 h
$ hg ci -Aqm2
$ hg merge
merging a
warning: cannot merge flags for b without common ancestor - keeping local flags
merging b
merging bx
warning: cannot merge flags for c without common ancestor - keeping local flags
merging d
warning: internal :merge cannot merge symlinks for d
warning: conflicts while merging d! (edit, then use 'hg resolve --mark')
merging f
warning: internal :merge cannot merge symlinks for f
warning: conflicts while merging f! (edit, then use 'hg resolve --mark')
merging h
warning: internal :merge cannot merge symlinks for h
warning: conflicts while merging h! (edit, then use 'hg resolve --mark')
warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
warning: conflicts while merging b! (edit, then use 'hg resolve --mark')
warning: conflicts while merging bx! (edit, then use 'hg resolve --mark')
3 files updated, 0 files merged, 0 files removed, 6 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
[1]
$ hg resolve -l
U a
U b
U bx
U d
U f
U h
$ tellmeabout a
a is a plain file with content:
<<<<<<< working copy: 0c617753b41b - test: 2
2
=======
1
>>>>>>> merge rev: 2e60aa20b912 - test: 1
$ tellmeabout b
b is a plain file with content:
<<<<<<< working copy: 0c617753b41b - test: 2
2
=======
1
>>>>>>> merge rev: 2e60aa20b912 - test: 1
$ tellmeabout c
c is a plain file with content:
x
$ tellmeabout d
d is a symlink:
d -> 2
$ tellmeabout e
e is a symlink:
e -> x
$ tellmeabout f
f is a symlink:
f -> 2
$ tellmeabout g
g is a symlink:
g -> x
$ tellmeabout h
h is a symlink:
h -> 2
$ hg up -Cqr1
$ hg merge
merging a
warning: cannot merge flags for b without common ancestor - keeping local flags
merging b
merging bx
warning: cannot merge flags for c without common ancestor - keeping local flags
merging d
warning: internal :merge cannot merge symlinks for d
warning: conflicts while merging d! (edit, then use 'hg resolve --mark')
merging f
warning: internal :merge cannot merge symlinks for f
warning: conflicts while merging f! (edit, then use 'hg resolve --mark')
merging h
warning: internal :merge cannot merge symlinks for h
warning: conflicts while merging h! (edit, then use 'hg resolve --mark')
warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
warning: conflicts while merging b! (edit, then use 'hg resolve --mark')
warning: conflicts while merging bx! (edit, then use 'hg resolve --mark')
3 files updated, 0 files merged, 0 files removed, 6 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
[1]
$ tellmeabout a
a is a plain file with content:
<<<<<<< working copy: 2e60aa20b912 - test: 1
1
=======
2
>>>>>>> merge rev: 0c617753b41b - test: 2
$ tellmeabout b
b is an executable file with content:
<<<<<<< working copy: 2e60aa20b912 - test: 1
1
=======
2
>>>>>>> merge rev: 0c617753b41b - test: 2
$ tellmeabout c
c is an executable file with content:
x
$ tellmeabout d
d is an executable file with content:
1
$ tellmeabout e
e is an executable file with content:
x (no-eol)
$ tellmeabout f
f is a plain file with content:
1
$ tellmeabout g
g is a plain file with content:
x (no-eol)
$ tellmeabout h
h is a symlink:
h -> 1
$ cd ..