#include
#include
#include "ourhdr.h"
int main (int argc , char *argv[] )
{
if (argc != 2) {
printf("usage: a.out\n");
exit (0);
}
if (access(argv[1],R_OK) <0)
printf("%s could not read \n",argv[1] );
else
printf("read access ok\n");
if (open(argv[1], O_RDONLY ) <0)
printf ("open error %s\n",argv[1]);
else
printf ("open for reading ok\n");
exit (0);
}
# ll a.out fstab
-rwxr-xr-x 1 ftp ftp 12050 2003-12-20 16:16 a.out
-rw-r----- 1 mail mail 626 2003-12-18 21:08 fstab
# ./a.out fstab
read access okOS is redhat 9.0
open for reading ok
分特
你shell的提示符是#啊
你在用root的身份來運(yùn)行程序，當(dāng)然可以訪問啦
不好意思。。。用ROOT用慣了，一時沒注意。。
發(fā)現(xiàn)用非ROOT也是用樣的提示符
#include
#include "ourhdr.h"
int main (int argc , char *argv[] )
{
if (argc != 2) {
printf("usage: a.out
exit (0);
}
if (access(argv[1],R_OK) <0)
printf("%s could not read \n",argv[1] );
else
printf("read access ok\n");
if (open(argv[1], O_RDONLY ) <0)
printf ("open error %s\n",argv[1]);
else
printf ("open for reading ok\n");
exit (0);
}
# ll a.out fstab
-rwxr-xr-x 1 ftp ftp 12050 2003-12-20 16:16 a.out
-rw-r----- 1 mail mail 626 2003-12-18 21:08 fstab
# ./a.out fstab
read access okOS is redhat 9.0
open for reading ok
分特
你shell的提示符是#啊
你在用root的身份來運(yùn)行程序，當(dāng)然可以訪問啦
不好意思。。。用ROOT用慣了，一時沒注意。。
發(fā)現(xiàn)用非ROOT也是用樣的提示符