Linux C Programs (14)

File Operations (Linux system programming)

When you create a directory, the system automatically creates two directories. and.


C language Implement permission control function

1#include <stdio.h>2#include <stdlib.h>3#include <sys/types.h>4#include <sys/stat.h>5 6 intMainintARGC,Char**argv) {7         intmode;8         intMode_u;9         intMode_g;Ten         intmode_o; One         Char*path; A  -         if(ARGC <3){ -printf"%s<mode num> <target file>\n", argv[0]); theExit0); -         } -                 //string conversion to Integer type -mode = Atoi (argv[1]); +         if(Mode >777|| Mode <0){ -printf"mode num Error! \ n"); +Exit0); A         } at  -Mode_u = mode/ -; -Mode_g = (Mode-(mode_u* -)) /Ten; -Mode_o = mode-(mode_u* -)-(mode_g*Ten); -mode = (Mode_u *8*8) + (Mode_g *8) +mode_o; -Path = argv[2]; in                 //Change permission function -         if(chmod (path, mode) = =-1){ toPerror ("chmod Error"); +Exit1); -         } the  *         return 0; $ }Panax Notoginseng      - Create a new file test.c theCommand:./program444TEST.c

Linux C Programs (14)