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运行结果 Testing with user 'bin' (uid: 1)
You have the right to call mlock
普通用户不是不能使用吗?求高手
#define _XOPEN_SOURCE 600
#include <sys/mman.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <pwd.h>
#include <string.h>
#include "posixtest.h"
#define BUFSIZE 8
/** Set the euid of this process to a non-root uid */
int set_nonroot()
{
struct passwd *pw;
setpwent();
/* search for the first user which is non root */
while((pw = getpwent()) != NULL)
if(strcmp(pw->pw_name, "root"))
break;
endpwent();
if(pw == NULL) {
printf("There is no other user than current and root.\n");
return 1;
}
if(seteuid(pw->pw_uid) != 0) {
if(errno == EPERM) {
printf("You don't have permission to change your UID.\n");
return 1;
}
perror("An error occurs when calling seteuid()");
return 1;
}
printf("Testing with user '%s' (uid: %d)\n",
pw->pw_name, (int)geteuid());
return 0;
}
int main() {
int result;
void *ptr;
set_nonroot();
/* This test should be run under standard user permissions */
if (getuid() == 0) {
if (set_nonroot() != 0) {
printf("Cannot run this test as non-root user\n");
return PTS_UNTESTED;
}
}
ptr = malloc(BUFSIZE);
if(ptr == NULL) {
printf("Can not allocate memory.\n");
return PTS_UNRESOLVED;
}
result = mlock(ptr, BUFSIZE);
if(result == -1 && errno == EPERM) {
printf("Test PASSED\n");
return PTS_PASS;
} else if(result == 0) {
printf("You have the right to call mlock\n");
return PTS_FAIL;
} else {
perror("Unexpected error");
return PTS_UNRESOLVED;
}
} |
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