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author | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 2020-05-22 15:39:29 -0300 |
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committer | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 2020-05-22 15:39:29 -0300 |
commit | efcf24be0c22cba57b298161bf4ab0561fd3c08e (patch) | |
tree | 5e6846467880a472a00ec02f3e27ca800884e161 /liolib.c | |
parent | 17dbaa8639505c9ad1a9946591f5960123fbd741 (diff) | |
download | lua-efcf24be0c22cba57b298161bf4ab0561fd3c08e.tar.gz lua-efcf24be0c22cba57b298161bf4ab0561fd3c08e.tar.bz2 lua-efcf24be0c22cba57b298161bf4ab0561fd3c08e.zip |
'luaL_execresult' does not assume -1 status as error
ISO C is silent about the return of 'system'. Windows sets 'errno' in
case of errors. Linux has several different error cases, with different
return values. ISO C allows 'system' to set 'errno' even if there are no
errors. Here we assume that a status==0 is success (which is the case
on several platforms), otherwise it is an error. If there is an error
number, gives the error based on it. (The worst a spurious 'errno'
can do is to generate a bad error message.) Otherwise uses the normal
results.
Diffstat (limited to 'liolib.c')
-rw-r--r-- | liolib.c | 1 |
1 files changed, 1 insertions, 0 deletions
@@ -270,6 +270,7 @@ static int io_open (lua_State *L) { | |||
270 | */ | 270 | */ |
271 | static int io_pclose (lua_State *L) { | 271 | static int io_pclose (lua_State *L) { |
272 | LStream *p = tolstream(L); | 272 | LStream *p = tolstream(L); |
273 | errno = 0; | ||
273 | return luaL_execresult(L, l_pclose(L, p->f)); | 274 | return luaL_execresult(L, l_pclose(L, p->f)); |
274 | } | 275 | } |
275 | 276 | ||