Shell script instance

Shell script instance 1. Switch the working directory to the directory given by the location parameter, and send hello to each file or subdirectory in these directories in sequence. The number of various files and subdirectories under these directories is counted and displayed. 01 #! /Bin/sh02 03 # Switch the working directory to the directory specified by the location parameter 04 # Send hello to each file or subdirectory in these directories in sequence 05 # count the number of various files and subdirectories in these directories, 06 07if [$ #-lt 1] 08then09 echo "parameter's number error! "; 10 exit 1; 11fi; 12 13 while [$ #-gt 0] 14do15 if [-f $1] 16 then17 echo" $1 is not a dir! "; 18 else 19 cd $120 21 bfiles = 0; # block Device Files 22 cfiles = 0; # character device files 23 pfiles = 0; # Pipe files 24 lfiles = 0; # Link file/directory 25 sfiles = 0; # sock file 26 files = 0; # common file 27 dirs = 0; # directory file 28 total = 0; # total files 29 for var in 'ls $ 1' 30 do31 total = 'expr $ total + 1'; 32 echo "hello $ var "; 33 if [-B $ var] 34 then35 bfiles = 'expr $ bfiles + 1'; 36 elif [-c $ var] 37 then38 cfiles = 'expr $ cfiles + 1 '; 39 elif [-S $ var] 40 then41 sfiles = 'expr $ sfiles + 1'; 42 elif [-p $ var] 43 then44 pfiles = 'expr $ pfiles + 1 '; 45 elif [-h $ var] 46 then47 lfiles = 'expr $ lfiles + 1'; 48 elif [-f $ var] 49 then50 files = 'expr $ files + 1 '; 51 elif [-d $ var] 52 then53 dirs = 'expr $ dirs + 1'; 54 fi; 55 done56 57 echo "the number of bfiles is $ bfiles "; 58 echo "the number of cfiles is $ cfiles"; 59 echo "the number of lfiles is $ lfiles"; 60 echo "the number of sfiles is $ sfiles "; 61 echo "the number of pfiles is $ pfiles"; 62 echo "the number of files is $ files"; 63 echo "the number of dirs is $ dirs "; 64 echo "total file number is $ total"; 65 fi; 66 echo "************************************" 67 shift; 68 done