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libc: improve access(AWRITE) and access(AEXEC) on directories

This commit is contained in:
Giacomo Tesio 2017-08-28 02:09:56 +02:00
parent b78613615d
commit 59e881c04d
1 changed files with 29 additions and 6 deletions
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35
sys/src/lib/c/9sys/access.c
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@ -22,8 +22,9 @@
int
jehanne_access(const char *name, int mode)
{
int fd;
int tmp, reqmode;
Dir *db;
char *user;
static char omode[] = {
OSTAT,
@ -36,16 +37,38 @@ jehanne_access(const char *name, int mode)
ORDWR /* 7=4+2+1 READ|WRITE|EXEC, ignore EXEC */
};
fd = open(name, omode[mode&AMASK]);
if(fd >= 0){
close(fd);
reqmode = omode[mode&AMASK];
tmp = open(name, reqmode);
if(tmp >= 0){
close(tmp);
return 0;
}
db = jehanne_dirstat(name);
if(db != nil){
fd = db->mode & omode[mode&AMASK];
if(db->mode & DMDIR){
/* check other first */
tmp = db->mode & reqmode;
if(tmp != reqmode){
/* TODO: make something better */
user = jehanne_getuser();
if(jehanne_strcmp(user, db->gid) == 0){
/* check group */
tmp = db->mode & (reqmode << 3);
tmp = tmp >> 3;
if(tmp != reqmode && jehanne_strcmp(user, db->uid)== 0){
/* check user */
tmp = db->mode & (reqmode << 6);
tmp = tmp >> 6;
}
} else if (jehanne_strcmp(user, db->uid)== 0){
/* check user */
tmp = db->mode & (reqmode << 6);
tmp = tmp >> 6;
}
}
}
jehanne_free(db);
if(fd)
if(tmp == reqmode)
return 0;
}
return -1;