Linux C中 getspnam crypt函数使用

一定要使用root权限运行此程序

编译时加上 -lcrypt 选项

#include <stdio.h> #include <sys/types.h> #include <fcntl.h> #include <shadow.h> #include <unistd.h> #include <string.h> #include <crypt.h> #define _XOPEN_SOURCE int main(int argc, const char *argv[]) { struct spwd * spwd = NULL; char * pass_name = NULL; char * crypt_pass = NULL; if(argc < 2) { fprintf(stderr, "Usage %s <user_name>\n", argv[0]); return -1; } pass_name = getpass("PassWord:"); spwd = getspnam(argv[1]); puts(spwd->sp_pwdp); crypt_pass = crypt(pass_name, spwd->sp_pwdp); if(crypt_pass == NULL) { fprintf(stderr, "crypt error\n"); } if(strcmp(crypt_pass, spwd->sp_pwdp) == 0) puts("ok!"); else puts("error!"); return 0; }

测试结果