Linux user information

Besides initProgramAll Linux programs are started by other programs or users.

UID is the key to user identity, type uid_t

# Include <sys/types. h>

# Include <unistd. h>

Uid_t getuid (void); uid of the user who starts the program

Char * getlogin (void); the login name associated with the current user

 

/Etc/passwd

/Etc/shadow

 

# Include <sys/types. h>
# Include <PWD. h>

Struct passwd * getpwnam (const char * Name );

Struct passwd * getpwuid (uid_t UID );