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Annotation of 3BSD/cmd/touch.c, revision 1.1.1.1

1.1       root        1: #include <stdio.h>
                      2: 
                      3: 
                      4: main(argc,argv)
                      5: int argc;
                      6: char *argv[];
                      7: {
                      8: int i;
                      9: static int force = 1;
                     10: 
                     11: for(i = 1 ; i < argc ; ++i)
                     12:        if( strcmp(argv[i], "-c") )
                     13:                touch(force, argv[i]);
                     14:        else
                     15:                force = 0;
                     16: }
                     17: 
                     18: 
                     19: 
                     20: 
                     21: #include <sys/types.h>
                     22: #include <sys/stat.h>
                     23: 
                     24: 
                     25: touch(force, name)
                     26: int force;
                     27: char *name;
                     28: {
                     29: struct stat stbuff;
                     30: char junk[1];
                     31: int fd;
                     32: 
                     33: if( stat(name,&stbuff) < 0)
                     34:        if(force)
                     35:                goto create;
                     36:        else
                     37:                {
                     38:                fprintf(stderr, "touch: file %s does not exist.\n", name);
                     39:                return;
                     40:                }
                     41: 
                     42: if(stbuff.st_size == 0)
                     43:        goto create;
                     44: 
                     45: if( (fd = open(name, 2)) < 0)
                     46:        goto bad;
                     47: 
                     48: if( read(fd, junk, 1) < 1)
                     49:        {
                     50:        close(fd);
                     51:        goto bad;
                     52:        }
                     53: lseek(fd, 0L, 0);
                     54: if( write(fd, junk, 1) < 1 )
                     55:        {
                     56:        close(fd);
                     57:        goto bad;
                     58:        }
                     59: close(fd);
                     60: return;
                     61: 
                     62: bad:
                     63:        fprintf(stderr, "Cannot touch %s\n", name);
                     64:        return;
                     65: 
                     66: create:
                     67:        if( (fd = creat(name, 0666)) < 0)
                     68:                goto bad;
                     69:        close(fd);
                     70: }

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