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patch 9.0.1400: find_file_in_path() is not reentrant

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Problem:    find_file_in_path() is not reentrant.
Solution:   Instead of global variables pass pointers to the functions.
            (closes #12093)
This commit is contained in:
Bram Moolenaar
2023-03-11 13:55:53 +00:00
parent 4df0772a41
commit 5145c9a829
6 changed files with 96 additions and 69 deletions
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102
src/findfile.c
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@@ -1571,23 +1571,21 @@ find_file_in_path(
int len, // length of file name
int options,
int first, // use count'th matching file name
char_u *rel_fname) // file name searching relative to
char_u *rel_fname, // file name searching relative to
char_u **file_to_find, // in/out: modified copy of file name
char **search_ctx) // in/out: state of the search
{
return find_file_in_path_option(ptr, len, options, first,
*curbuf->b_p_path == NUL ? p_path : curbuf->b_p_path,
FINDFILE_BOTH, rel_fname, curbuf->b_p_sua);
FINDFILE_BOTH, rel_fname, curbuf->b_p_sua,
file_to_find, search_ctx);
}
static char_u *ff_file_to_find = NULL;
static void *fdip_search_ctx = NULL;
# if defined(EXITFREE) || defined(PROTO)
void
free_findfile(void)
{
vim_free(ff_file_to_find);
vim_findfile_cleanup(fdip_search_ctx);
vim_free(ff_expand_buffer);
VIM_CLEAR(ff_expand_buffer);
}
# endif
@@ -1607,10 +1605,13 @@ find_directory_in_path(
char_u *ptr, // file name
int len, // length of file name
int options,
char_u *rel_fname) // file name searching relative to
char_u *rel_fname, // file name searching relative to
char_u **file_to_find, // in/out: modified copy of file name
char **search_ctx) // in/out: state of the search
{
return find_file_in_path_option(ptr, len, options, TRUE, p_cdpath,
FINDFILE_DIR, rel_fname, (char_u *)"");
FINDFILE_DIR, rel_fname, (char_u *)"",
file_to_find, search_ctx);
}
char_u *
@@ -1622,8 +1623,11 @@ find_file_in_path_option(
char_u *path_option, // p_path or p_cdpath
int find_what, // FINDFILE_FILE, _DIR or _BOTH
char_u *rel_fname, // file name we are looking relative to.
char_u *suffixes) // list of suffixes, 'suffixesadd' option
char_u *suffixes, // list of suffixes, 'suffixesadd' option
char_u **file_to_find, // in/out: modified copy of file name
char **search_ctx_arg) // in/out: state of the search
{
ff_search_ctx_T **search_ctx = (ff_search_ctx_T **)search_ctx_arg;
static char_u *dir;
static int did_findfile_init = FALSE;
char_u save_char;
@@ -1649,9 +1653,9 @@ find_file_in_path_option(
expand_env_esc(ptr, NameBuff, MAXPATHL, FALSE, TRUE, NULL);
ptr[len] = save_char;
vim_free(ff_file_to_find);
ff_file_to_find = vim_strsave(NameBuff);
if (ff_file_to_find == NULL) // out of memory
vim_free(*file_to_find);
*file_to_find = vim_strsave(NameBuff);
if (*file_to_find == NULL) // out of memory
{
file_name = NULL;
goto theend;
@@ -1659,30 +1663,30 @@ find_file_in_path_option(
if (options & FNAME_UNESC)
{
// Change all "\ " to " ".
for (ptr = ff_file_to_find; *ptr != NUL; ++ptr)
for (ptr = *file_to_find; *ptr != NUL; ++ptr)
if (ptr[0] == '\\' && ptr[1] == ' ')
mch_memmove(ptr, ptr + 1, STRLEN(ptr));
}
}
rel_to_curdir = (ff_file_to_find[0] == '.'
&& (ff_file_to_find[1] == NUL
|| vim_ispathsep(ff_file_to_find[1])
|| (ff_file_to_find[1] == '.'
&& (ff_file_to_find[2] == NUL
|| vim_ispathsep(ff_file_to_find[2])))));
if (vim_isAbsName(ff_file_to_find)
rel_to_curdir = ((*file_to_find)[0] == '.'
&& ((*file_to_find)[1] == NUL
|| vim_ispathsep((*file_to_find)[1])
|| ((*file_to_find)[1] == '.'
&& ((*file_to_find)[2] == NUL
|| vim_ispathsep((*file_to_find)[2])))));
if (vim_isAbsName(*file_to_find)
// "..", "../path", "." and "./path": don't use the path_option
|| rel_to_curdir
# if defined(MSWIN)
// handle "\tmp" as absolute path
|| vim_ispathsep(ff_file_to_find[0])
|| vim_ispathsep((*file_to_find)[0])
// handle "c:name" as absolute path
|| (ff_file_to_find[0] != NUL && ff_file_to_find[1] == ':')
|| ((*file_to_find)[0] != NUL && (*file_to_find)[1] == ':')
# endif
# ifdef AMIGA
// handle ":tmp" as absolute path
|| ff_file_to_find[0] == ':'
|| (*file_to_find)[0] == ':'
# endif
)
{
@@ -1696,9 +1700,9 @@ find_file_in_path_option(
int l;
int run;
if (path_with_url(ff_file_to_find))
if (path_with_url(*file_to_find))
{
file_name = vim_strsave(ff_file_to_find);
file_name = vim_strsave(*file_to_find);
goto theend;
}
@@ -1706,7 +1710,7 @@ find_file_in_path_option(
// Otherwise or when this fails use the current directory.
for (run = 1; run <= 2; ++run)
{
l = (int)STRLEN(ff_file_to_find);
l = (int)STRLEN(*file_to_find);
if (run == 1
&& rel_to_curdir
&& (options & FNAME_REL)
@@ -1714,12 +1718,12 @@ find_file_in_path_option(
&& STRLEN(rel_fname) + l < MAXPATHL)
{
STRCPY(NameBuff, rel_fname);
STRCPY(gettail(NameBuff), ff_file_to_find);
STRCPY(gettail(NameBuff), *file_to_find);
l = (int)STRLEN(NameBuff);
}
else
{
STRCPY(NameBuff, ff_file_to_find);
STRCPY(NameBuff, *file_to_find);
run = 2;
}
@@ -1753,7 +1757,7 @@ find_file_in_path_option(
if (first == TRUE)
{
// vim_findfile_free_visited can handle a possible NULL pointer
vim_findfile_free_visited(fdip_search_ctx);
vim_findfile_free_visited(*search_ctx);
dir = path_option;
did_findfile_init = FALSE;
}
@@ -1762,7 +1766,7 @@ find_file_in_path_option(
{
if (did_findfile_init)
{
file_name = vim_findfile(fdip_search_ctx);
file_name = vim_findfile(*search_ctx);
if (file_name != NULL)
break;
@@ -1776,8 +1780,8 @@ find_file_in_path_option(
{
// We searched all paths of the option, now we can
// free the search context.
vim_findfile_cleanup(fdip_search_ctx);
fdip_search_ctx = NULL;
vim_findfile_cleanup(*search_ctx);
*search_ctx = NULL;
break;
}
@@ -1790,10 +1794,10 @@ find_file_in_path_option(
// get the stopdir string
r_ptr = vim_findfile_stopdir(buf);
fdip_search_ctx = vim_findfile_init(buf, ff_file_to_find,
*search_ctx = vim_findfile_init(buf, *file_to_find,
r_ptr, 100, FALSE, find_what,
fdip_search_ctx, FALSE, rel_fname);
if (fdip_search_ctx != NULL)
*search_ctx, FALSE, rel_fname);
if (*search_ctx != NULL)
did_findfile_init = TRUE;
vim_free(buf);
}
@@ -1804,20 +1808,17 @@ find_file_in_path_option(
if (first == TRUE)
{
if (find_what == FINDFILE_DIR)
semsg(_(e_cant_find_directory_str_in_cdpath),
ff_file_to_find);
semsg(_(e_cant_find_directory_str_in_cdpath), *file_to_find);
else
semsg(_(e_cant_find_file_str_in_path),
ff_file_to_find);
semsg(_(e_cant_find_file_str_in_path), *file_to_find);
}
else
{
if (find_what == FINDFILE_DIR)
semsg(_(e_no_more_directory_str_found_in_cdpath),
ff_file_to_find);
*file_to_find);
else
semsg(_(e_no_more_file_str_found_in_path),
ff_file_to_find);
semsg(_(e_no_more_file_str_found_in_path), *file_to_find);
}
}
@@ -2046,8 +2047,11 @@ find_file_name_in_path(
if (options & FNAME_EXP)
{
char_u *file_to_find = NULL;
char *search_ctx = NULL;
file_name = find_file_in_path(ptr, len, options & ~FNAME_MESS,
TRUE, rel_fname);
TRUE, rel_fname, &file_to_find, &search_ctx);
# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL)
/*
@@ -2063,7 +2067,7 @@ find_file_name_in_path(
ptr = tofree;
len = (int)STRLEN(ptr);
file_name = find_file_in_path(ptr, len, options & ~FNAME_MESS,
TRUE, rel_fname);
TRUE, rel_fname, &file_to_find, &search_ctx);
}
}
# endif
@@ -2080,8 +2084,12 @@ find_file_name_in_path(
while (file_name != NULL && --count > 0)
{
vim_free(file_name);
file_name = find_file_in_path(ptr, len, options, FALSE, rel_fname);
file_name = find_file_in_path(ptr, len, options, FALSE, rel_fname,
&file_to_find, &search_ctx);
}
vim_free(file_to_find);
vim_findfile_cleanup(search_ctx);
}
else
file_name = vim_strnsave(ptr, len);