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In the unix VFS, always set every open file to close-on-exec using either

Browse Source 
O_CLOEXEC at open (preferred) or FD_CLOEXEC in an ioctl after opening.  Before
this changes, many files were done this way, but not all.

FossilOrigin-Name: 9efbeb11ae0d480a13ff1353820c12f3a8bff452
This commit is contained in:
drh 2012-04-14 13:25:11 +00:00
parent 2b32b9941d
commit 5adc60bab0
3 changed files with 22 additions and 20 deletions
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12
manifest
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@ -1,5 +1,5 @@
C Fix\sa\stypo\sin\sa\scomment\sthat\sis\sextracted\sfor\sdocumentation.\s\sNo\schanges\sto\s\ncode.
D 2012-04-14T11:48:25.387
C In\sthe\sunix\sVFS,\salways\sset\severy\sopen\sfile\sto\sclose-on-exec\susing\seither\nO_CLOEXEC\sat\sopen\s(preferred)\sor\sFD_CLOEXEC\sin\san\sioctl\safter\sopening.\s\sBefore\nthis\schanges,\smany\sfiles\swere\sdone\sthis\sway,\sbut\snot\sall.
D 2012-04-14T13:25:11.842
F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
F Makefile.in 2f37e468503dbe79d35c9f6dffcf3fae1ae9ec20
F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@ -167,7 +167,7 @@ F src/os.c e1acdc09ff3ac2412945cca9766e2dcf4675f31c
F src/os.h 59beba555b65a450bd1d804220532971d4299f60
F src/os_common.h 92815ed65f805560b66166e3583470ff94478f04
F src/os_os2.c 4a75888ba3dfc820ad5e8177025972d74d7f2440
F src/os_unix.c 75eff7b41cdc9f319eb0c610c19fd9bb37093e5d
F src/os_unix.c 424d46e0edab969293c2223f09923b2178171f47
F src/os_win.c 5e9e933a412ab35de2a6506b3c6a8295b31b309e
F src/pager.c 85988507fa20acc60defb834722eddf4633e4aeb
F src/pager.h ef1eaf8593e78f73885c1dfac27ad83bee23bdc5
@ -1000,7 +1000,7 @@ F tool/tostr.awk e75472c2f98dd76e06b8c9c1367f4ab07e122d06
F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
F tool/warnings-clang.sh a8a0a3babda96dfb1ff51adda3cbbf3dfb7266c2
F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
P a134e6e739cbb27701b092b33033244feb164cdf
R dc8223e1fbe157a1af14143d14cea055
P e87371c5081ce28431a4c7ceaa81ff966a378c66
R 7b4651c870902ae8ed7532d13f371f85
U drh
Z e383e3414cd7f05936f8f4b15cd51898
Z 1af9fe4892fd87b77f8c0791d9bcac7c

2
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@ -1 +1 @@
e87371c5081ce28431a4c7ceaa81ff966a378c66
9efbeb11ae0d480a13ff1353820c12f3a8bff452

28
src/os_unix.c
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@ -165,8 +165,8 @@
#endif
/*
** Default permissions when creating auto proxy dir
*/
** Default permissions when creating auto proxy dir
*/
#ifndef SQLITE_DEFAULT_PROXYDIR_PERMISSIONS
# define SQLITE_DEFAULT_PROXYDIR_PERMISSIONS 0755
#endif
@ -512,7 +512,7 @@ static const char *unixNextSystemCall(sqlite3_vfs *p, const char *zName){
/*
** Invoke open(). Do so multiple times, until it either succeeds or
** files for some reason other than EINTR.
** fails for some reason other than EINTR.
**
** If the file creation mode "m" is 0 then set it to the default for
** SQLite. The default is SQLITE_DEFAULT_FILE_PERMISSIONS (normally
@ -528,7 +528,7 @@ static const char *unixNextSystemCall(sqlite3_vfs *p, const char *zName){
** recover the hot journals.
*/
static int robust_open(const char *z, int f, mode_t m){
int rc;
int fd;
mode_t m2;
mode_t origM = 0;
if( m==0 ){
@ -537,11 +537,20 @@ static int robust_open(const char *z, int f, mode_t m){
m2 = m;
origM = osUmask(0);
}
do{ rc = osOpen(z,f,m2); }while( rc<0 && errno==EINTR );
do{
#if defined(O_CLOEXEC)
fd = osOpen(z,f|O_CLOEXEC,m2);
#else
fd = osOpen(z,f,m2);
#endif
}while( fd<0 && errno==EINTR );
if( m ){
osUmask(origM);
}
return rc;
#if defined(FD_CLOEXEC) && (!defined(O_CLOEXEC) || O_CLOEXEC==0)
if( fd>=0 ) osFcntl(fd, F_SETFD, osFcntl(fd, F_GETFD, 0) | FD_CLOEXEC);
#endif
return fd;
}
/*
@ -3336,9 +3345,6 @@ static int openDirectory(const char *zFilename, int *pFd){
zDirname[ii] = '\0';
fd = robust_open(zDirname, O_RDONLY|O_BINARY, 0);
if( fd>=0 ){
#ifdef FD_CLOEXEC
osFcntl(fd, F_SETFD, osFcntl(fd, F_GETFD, 0) | FD_CLOEXEC);
#endif
OSTRACE(("OPENDIR %-3d %s\n", fd, zDirname));
}
}
@ -5183,10 +5189,6 @@ static int unixOpen(
}
#endif
#ifdef FD_CLOEXEC
osFcntl(fd, F_SETFD, osFcntl(fd, F_GETFD, 0) | FD_CLOEXEC);
#endif
noLock = eType!=SQLITE_OPEN_MAIN_DB;