BSD 4 release

[unix-history] / usr / src / cmd / chgrp.c

static char *sccsid = "@(#)chgrp.c      4.1 (Berkeley) 10/1/80";
/*
* chgrp gid file ...
*/

#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <grp.h>

struct  group   *gr,*getgrnam();
struct  stat    stbuf;
int     gid;
int     status;

main(argc, argv)
char *argv[];
{
       register c;

       if(argc < 3) {
               printf("usage: chgrp gid file ...\n");
               exit(4);
       }
       if(isnumber(argv[1])) {
               gid = atoi(argv[1]);
       } else {
               if((gr=getgrnam(argv[1])) == NULL) {
                       printf("unknown group: %s\n",argv[1]);
                       exit(4);
               }
               gid = gr->gr_gid;
       }
       for(c=2; c<argc; c++) {
               stat(argv[c], &stbuf);
               if(chown(argv[c], stbuf.st_uid, gid) < 0) {
                       perror(argv[c]);
                       status = 1;
               }
       }
       exit(status);
}

isnumber(s)
char *s;
{
       register c;

       while(c = *s++)
               if(!isdigit(c))
                       return(0);
       return(1);
}