从Unix中的用户名中获取UID和GID? [英] Programatically getting UID and GID from username in Unix?
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问题描述
是否有系统调用来执行此操作?我不想硬编码或从/ etc / passwd解析。
我也想编程,而不是使用:
id -u USERNAME
任何帮助将非常感谢
解决方案
查看 getpwnam()和 getgrnam()函数。
I'm trying to use setuid() and setgid() to set the respective id's of a program to drop privileges down from root, but to use them I need to know the uid and gid of the user I want to change to.
Is there a system call to do this? I don't want to hardcode it or parse from /etc/passwd .
Also I'd like to do this programatically rather than using:
id -u USERNAME
Any help would be greatly appreciated
解决方案
Have a look at the getpwnam() and getgrnam() functions.
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