Linux® Programming by Example

Chapter 7. Putting It All Together: ls

In this chapter

• 7.1 V7 ls Options page 208

• 7.2 V7 ls Code page 209

• 7.3 Summary page 225

• Exercises page 226

The V7 ls command nicely ties together everything we’ve seen so far. It uses almost all of the APIs we’ve covered, touching on many aspects of Unix programming: memory allocation, file metadata, dates and times, user names, directory reading, and sorting.

V7 ls Options

In comparison to modern versions of ls, the V7 ls accepted only a handful of options and the meaning of some of them is different for V7 than for current ls. The options are as follows:

-a	Print all directory entries. Without this, don’t print ’.’ and ’..’. Interestingly enough, V7 ls ignores only ’.’ and ’..’, while V1 through V6 ignore any file ...