Subversion Repositories planix.SVN

#include <errno.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "lib.h"
#include <sys/stat.h>
#include "sys9.h"

/*
 * O_NOCTTY has no effect
 */
int
open(const char *path, int flags, ...)
{
        int n;
        long f;
        int mode;
        Fdinfo *fi;
        va_list va;

        f = flags&O_ACCMODE;
        if(flags&O_CREAT){
                if(access(path, 0) >= 0){
                        if(flags&O_EXCL){
                                errno = EEXIST;
                                return -1;
                        }else{
                                if((flags&O_TRUNC)&&(flags&(O_RDWR|O_WRONLY)))
                                        f |= 16;
                                n = _OPEN(path, f);
                        }
                }else{
                        va_start(va, flags);
                        mode = va_arg(va, int);
                        va_end(va);
                        n = _CREATE(path, f, mode&0777);
                }
                if(n < 0)
                        _syserrno();
        }else{
                if((flags&O_TRUNC)&&(flags&(O_RDWR|O_WRONLY)))
                        f |= 16;
                n = _OPEN(path, f);
                if(n < 0)
                        _syserrno();
        }
        if(n >= 0){
                fi = &_fdinfo[n];
                fi->flags = FD_ISOPEN;
                fi->oflags = flags&(O_ACCMODE|O_NONBLOCK|O_APPEND);
                fi->uid = -2;
                fi->gid = -2;
                fi->name = malloc(strlen(path)+1);
                if(fi->name)
                        strcpy(fi->name, path);
                if(fi->oflags&O_APPEND)
                        _SEEK(n, 0, 2);
        }
        return n;
}