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patch 8.2.0151: detecting a script was already sourced is unreliable

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Problem:    Detecting a script was already sourced is unreliable.
Solution:   Do not use the inode number.
This commit is contained in:
Bram Moolenaar
2020-01-26 17:38:12 +01:00
parent 673660ab00
commit 978d170bdc
4 changed files with 13 additions and 39 deletions
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35
src/scriptfile.c
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@@ -1091,10 +1091,6 @@ do_source(
int save_debug_break_level = debug_break_level;
int sid;
scriptitem_T *si = NULL;
# ifdef UNIX
stat_T st;
int stat_ok;
# endif
#endif
#ifdef STARTUPTIME
struct timeval tv_rel;
@@ -1121,26 +1117,17 @@ do_source(
#ifdef FEAT_EVAL
// See if we loaded this script before.
# ifdef UNIX
stat_ok = (mch_stat((char *)fname_exp, &st) >= 0);
# endif
for (sid = script_items.ga_len; sid > 0; --sid)
{
// We used to check inode here, but that doesn't work:
// - If a script is edited and written, it may get a different
// inode number, even though to the user it is the same script.
// - If a script is deleted and another script is written, with a
// different name, the inode may be re-used.
si = &SCRIPT_ITEM(sid);
if (si->sn_name != NULL)
{
# ifdef UNIX
// Compare dev/ino when possible, it catches symbolic links. Also
// compare file names, the inode may change when the file was
// edited or it may be re-used for another script (esp. in tests).
if ((stat_ok && si->sn_dev_valid)
&& (si->sn_dev != st.st_dev || si->sn_ino != st.st_ino))
continue;
# endif
if (fnamecmp(si->sn_name, fname_exp) == 0)
if (si->sn_name != NULL && fnamecmp(si->sn_name, fname_exp) == 0)
// Found it!
break;
}
}
if (sid > 0 && ret_sid != NULL)
{
@@ -1324,16 +1311,6 @@ do_source(
si = &SCRIPT_ITEM(current_sctx.sc_sid);
si->sn_name = fname_exp;
fname_exp = vim_strsave(si->sn_name); // used for autocmd
# ifdef UNIX
if (stat_ok)
{
si->sn_dev_valid = TRUE;
si->sn_dev = st.st_dev;
si->sn_ino = st.st_ino;
}
else
si->sn_dev_valid = FALSE;
# endif
if (ret_sid != NULL)
*ret_sid = current_sctx.sc_sid;
}