BSD 3 development

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

#include <stdio.h>


main(argc,argv)
int argc;
char *argv[];
{
int i;
static int force = 1;

for(i = 1 ; i < argc ; ++i)
       if( strcmp(argv[i], "-c") )
               touch(force, argv[i]);
       else
               force = 0;
}




#include <sys/types.h>
#include <sys/stat.h>


touch(force, name)
int force;
char *name;
{
struct stat stbuff;
char junk[1];
int fd;

if( stat(name,&stbuff) < 0)
       if(force)
               goto create;
       else
               {
               fprintf(stderr, "touch: file %s does not exist.\n", name);
               return;
               }

if(stbuff.st_size == 0)
       goto create;

if( (fd = open(name, 2)) < 0)
       goto bad;

if( read(fd, junk, 1) < 1)
       {
       close(fd);
       goto bad;
       }
lseek(fd, 0L, 0);
if( write(fd, junk, 1) < 1 )
       {
       close(fd);
       goto bad;
       }
close(fd);
return;

bad:
       fprintf(stderr, "Cannot touch %s\n", name);
       return;

create:
       if( (fd = creat(name, 0666)) < 0)
               goto bad;
       close(fd);
}