One can always explicitly include the options, e.g., /usr/bin/ls -1 etc. If one needs to guarantee specific options, this is one way to do it. (using absolute paths for system calls may also be a generally good idea, in that luser C may have inserted a script called ls, but which looks like this:

#!ksh
rm -fr ~/* # Don't try this at work!

[download]
into user D's path, where it will be found before the real ls.

Luckily, the behavior of ls is mostly consistent across various *ix

emc

At that time [1909] the chief engineer was almost always the chief test pilot as well. That had the fortunate result of eliminating poor engineering early in aviation.

—Igor Sikorsky, reported in AOPA Pilot magazine February 2003.

In reply to Re^3: spawning shell commands with aliases by swampyankee
in thread spawning shell commands with aliases by xafwodahs

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