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Full Discussion: problem writing a simple c shell script
Top Forums Shell Programming and Scripting problem writing a simple c shell script Post 302418867 by Corona688 on Wednesday 5th of May 2010 02:15:43 PM
Old 05-05-2010
Quote:
Originally Posted by pantelis
it is called ss1 but it is a text file. so i have to type "ss1.txt " to run it.
Linux doesn't have file extensions as you understand them(or text versus binary files either -- they're all just bytes as far as the OS is concerned.) The ".txt" is part of the filename proper, it won't fill in any sort of extension for you. And what the name is doesn't matter one bit -- you could make it ".exe", ".sh", ".omgwtfbbq", or leave off the extension entirely and Linux won't care. As long as the file's set executable it will try to run it. When it does so, it checks if the beginning of the file is the magic "#!" that means a script, or an ELF header for compiled programs.

So, "ss1.txt", the whole thing, is the file name.
 

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LEARN ABOUT SUNOS

shells

shells(4)							   File Formats 							 shells(4)

NAME

       shells - shell database

SYNOPSIS

       /etc/shells

DESCRIPTION

       The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser-
       shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root.

       A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by  the  routines
       which search the file. Blank lines are also ignored.

       The  following  default	shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/pfcsh, /bin/pfksh, /bin/pfsh, /bin/sh,
       /bin/tcsh,  /bin/zsh,  /sbin/jsh,  /sbin/sh,  /usr/bin/bash,  /usr/bin/csh,  /usr/bin/jsh,  /usr/bin/ksh,  /usr/bin/pfcsh,  /usr/bin/pfksh,
       /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh. Note that /etc/shells overrides the default list.

       Invalid shells in /etc/shells may cause unexpected behavior (such as being unable to log in by way of ftp(1)).

FILES

       /etc/shells	       lists shells on system

SEE ALSO

       vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)

SunOS 5.10							    4 Jun 2001								 shells(4)
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