UNIX for Dummies Questions & Answers

#define S_IRWXU     00700   /* read, write, execute: owner */
#define S_IRUSR     00400   /* read permission: owner */
#define S_IWUSR     00200   /* write permission: owner */
#define S_IXUSR     00100   /* execute permission: owner */
#define S_IRWXG     00070   /* read, write, execute: group */
#define S_IRGRP     00040   /* read permission: group */
#define S_IWGRP     00020   /* write permission: group */
#define S_IXGRP     00010   /* execute permission: group */
#define S_IRWXO     00007   /* read, write, execute: other */
#define S_IROTH     00004   /* read permission: other */
#define S_IWOTH     00002   /* write permission: other */
#define S_IXOTH     00001   /* execute permission: other */