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Doubt in shebang line!!

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# 1  
Old 11-25-2008
Lightbulb Doubt in shebang line!!
Do we need to include the exclamatory mark in the shebang line??Smilie
What if we dont include it??Smilie

Actually what shebang line implies when we run a script??

shebang line--> #!/bin/ksh Smilie
# 2  
Old 11-25-2008
Perhaps this link may help you - https://www.unix.com/answers-frequent...-ksh-mean.html
# 3  
Old 11-25-2008
Even if i dont include it, ma sscript is running fine..

so whats the point in including it??Smilie
# 4  
Old 11-25-2008
Consider this, for example:

Code:
$ ps -p $$
      PID    PPID    PGID     WINPID  TTY  UID    STIME COMMAND
     2616    3828    2616       4044    1 1003 11:56:15 /usr/bin/bash
$ cat s  
#! /usr/local/bin/zsh

print -l **/*(/)
$ ./s
backup
dir1
$ sed -i 1d s
$ cat s

print -l **/*(/)
$ ./s
./s: line 2: syntax error near unexpected token `('
./s: line 2: `print -l **/*(/)

# 5  
Old 11-25-2008
hi radoulov,

am working in ksh and i tried ur snippet..its not givin any error if we don include shebangSmilie
# 6  
Old 11-25-2008
So you get the idea, try executing it from another shell ...

Code:
$ ksh -c 'print -l **/*(/)'  
ksh: print: -l: unknown option
$ ksh93 -c 'print -l **/*(/)'
/var/opt/ast/bin/ksh[1]: print: -l: unknown option
Usage: print [-enprsv] [-f format] [-u fd] [string ...]
$ zsh -c 'print -l **/*(/)' 
backup
dir1
$ bash -c 'print -l **/*(/)' 
bash: -c: line 0: syntax error near unexpected token `('
bash: -c: line 0: `print -l **/*(/)'
$ dash -c 'print -l **/*(/)'
zsh: correct 'dash' to 'ash' [nyae]? y
Syntax error: "(" unexpected
$ sh -c 'print -l **/*(/)' 
sh: -c: line 0: syntax error near unexpected token `('
sh: -c: line 0: `print -l **/*(/)'
$ csh -c 'print -l **/*(/)'
Badly placed ()'s.
$ tcsh -c 'print -l **/*(/)'
Badly placed ()'s.
$ pdksh -c 'print -l **/*(/)'
pdksh: print: -l: unknown option

# 7  
Old 11-25-2008
It just helps you in using the intended shell, for example time in csh isn't the same in ksh, it's built in and different. The ksh uses /usr/bin/time (depends I'm sure).
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