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#include "lib.h"
#include <string.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include "sys9.h"
#include "dir.h"
int
access(const char *name, int mode)
{
int fd;
Dir *db;
struct stat st;
static char omode[] = {
0,
3,
1,
2,
0,
2,
2,
2
};
if(mode == 0){
db = _dirstat(name);
if(db == nil){
_syserrno();
return -1;
}
free(db);
return 0;
}
fd = open(name, omode[mode&7]);
if(fd >= 0){
close(fd);
return 0;
}
else if(stat(name, &st)==0 && S_ISDIR(st.st_mode)){
if(mode & (R_OK|X_OK)){
fd = open(name, O_RDONLY);
if(fd < 0)
return -1;
close(fd);
}
if(mode & W_OK){
char *tname;
int nname;
nname = strlen(name);
tname = malloc(nname+32);
if(tname == 0)
return -1;
memset(tname, 0, nname+32);
memcpy(tname, name, nname);
memcpy(tname+nname, "/_AcChAcK", 9);
_ultoa(tname+nname+9, getpid());
fd = _CREATE(tname, ORCLOSE, 0666);
if(fd < 0){
_syserrno();
free(tname);
return -1;
}
_CLOSE(fd);
free(tname);
}
return 0;
}
return -1;
}
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