| 1 | /* |
| 2 | * chgrp gid file ... |
| 3 | */ |
| 4 | |
| 5 | #include <stdio.h> |
| 6 | #include <ctype.h> |
| 7 | #include <sys/types.h> |
| 8 | #include <sys/stat.h> |
| 9 | #include <grp.h> |
| 10 | |
| 11 | struct group *gr,*getgrnam(); |
| 12 | struct stat stbuf; |
| 13 | int gid; |
| 14 | int status; |
| 15 | |
| 16 | main(argc, argv) |
| 17 | char *argv[]; |
| 18 | { |
| 19 | register c; |
| 20 | |
| 21 | if(argc < 3) { |
| 22 | printf("usage: chgrp gid file ...\n"); |
| 23 | exit(4); |
| 24 | } |
| 25 | if(isnumber(argv[1])) { |
| 26 | gid = atoi(argv[1]); |
| 27 | } else { |
| 28 | if((gr=getgrnam(argv[1])) == NULL) { |
| 29 | printf("unknown group: %s\n",argv[1]); |
| 30 | exit(4); |
| 31 | } |
| 32 | gid = gr->gr_gid; |
| 33 | } |
| 34 | for(c=2; c<argc; c++) { |
| 35 | stat(argv[c], &stbuf); |
| 36 | if(chown(argv[c], stbuf.st_uid, gid) < 0) { |
| 37 | perror(argv[c]); |
| 38 | status = 1; |
| 39 | } |
| 40 | } |
| 41 | exit(status); |
| 42 | } |
| 43 | |
| 44 | isnumber(s) |
| 45 | char *s; |
| 46 | { |
| 47 | register c; |
| 48 | |
| 49 | while(c = *s++) |
| 50 | if(!isdigit(c)) |
| 51 | return(0); |
| 52 | return(1); |
| 53 | } |