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:recover : Fix crash on non-existent *.swp #9504

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Reverts d2944e6a29. mf_open() _can_ fail if the file does not exist.

closes #9503
closes #9504
This commit is contained in:
raffitz
2019-01-14 14:09:47 +00:00
committed by Justin M. Keyes
parent 387ab4f706
commit 95fa71c6d2
4 changed files with 23 additions and 11 deletions
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3
src/nvim/memfile.c
View File

@@ -76,7 +76,8 @@
/// @param flags Flags for open() call.
///
/// @return The open memory file.
/// @return - The open memory file, on success.
/// - NULL, on failure (e.g. file does not exist).
memfile_T *mf_open(char_u *fname, int flags)
{
memfile_T *mfp = xmalloc(sizeof(memfile_T));

7
src/nvim/memline.c
View File

@@ -277,6 +277,9 @@ int ml_open(buf_T *buf)
// Open the memfile. No swap file is created yet.
memfile_T *mfp = mf_open(NULL, 0);
if (mfp == NULL) {
goto error;
}
buf->b_ml.ml_mfp = mfp;
buf->b_ml.ml_flags = ML_EMPTY;
@@ -360,10 +363,12 @@ int ml_open(buf_T *buf)
return OK;
error:
if (mfp != NULL) {
if (hp) {
mf_put(mfp, hp, false, false);
}
mf_close(mfp, true); // will also xfree(mfp->mf_fname)
}
buf->b_ml.ml_mfp = NULL;
return FAIL;
}
@@ -839,7 +844,7 @@ void ml_recover(void)
mf_open() will consume "fname_used"! */
mfp = mf_open(fname_used, O_RDONLY);
fname_used = p;
if (mfp->mf_fd < 0) {
if (mfp == NULL || mfp->mf_fd < 0) {
EMSG2(_("E306: Cannot open %s"), fname_used);
goto theend;
}

2
src/nvim/spell.c
View File

@@ -2510,7 +2510,7 @@ buf_T *open_spellbuf(void)
buf->b_spell = true;
buf->b_p_swf = true; // may create a swap file
if (ml_open(buf) == FAIL) {
abort();
ELOG("Error opening a new memline");
}
ml_open_file(buf); // create swap file now

16
test/functional/ex_cmds/swapfile_preserve_recover_spec.lua
View File

@@ -1,10 +1,11 @@
local Screen = require('test.functional.ui.screen')
local helpers = require('test.functional.helpers')(after_each)
local lfs = require('lfs')
local feed_command, eq, eval, expect, source =
helpers.feed_command, helpers.eq, helpers.eval, helpers.expect, helpers.source
local eq, eval, expect, source =
helpers.eq, helpers.eval, helpers.expect, helpers.source
local clear = helpers.clear
local command = helpers.command
local expect_err = helpers.expect_err
local feed = helpers.feed
local nvim_prog = helpers.nvim_prog
local ok = helpers.ok
@@ -17,9 +18,14 @@ describe(':recover', function()
before_each(clear)
it('fails if given a non-existent swapfile', function()
local swapname = 'bogus-swapfile'
feed_command('recover '..swapname) -- This should not segfault. #2117
eq('E305: No swap file found for '..swapname, eval('v:errmsg'))
local swapname = 'bogus_swapfile'
local swapname2 = 'bogus_swapfile.swp'
expect_err('E305: No swap file found for '..swapname,
command, 'recover '..swapname) -- Should not segfault. #2117
-- Also check filename ending with ".swp". #9504
expect_err('Vim%(recover%):E306: Cannot open '..swapname2,
command, 'recover '..swapname2) -- Should not segfault. #2117
eq(2, eval('1+1')) -- Still alive?
end)
end)