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