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ls: add option to reverse the sort order

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Now you can list directory contents ordered by mtime with the
latest file displayed last in the output.
This commit is contained in:
Markus Teich 2013-10-04 11:12:11 +01:00 committed by sin
parent 96c8c5f389
commit 3a3cd24092
2 changed files with 9 additions and 2 deletions
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3
ls.1
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@ -24,6 +24,9 @@ print the index number of each file.
lists detailed information about each file, including their type, permissions, lists detailed information about each file, including their type, permissions,
links, owner, group, size, and modification time. links, owner, group, size, and modification time.
.TP .TP
.B \-r
reverses the sort order.
.TP
.B \-t .B \-t
sorts files by modification time instead of by name. sorts files by modification time instead of by name.
.TP .TP

8
ls.c
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@ -35,6 +35,7 @@ static bool iflag = false;
static bool lflag = false; static bool lflag = false;
static bool tflag = false; static bool tflag = false;
static bool Uflag = false; static bool Uflag = false;
static int sortorder = 1;
static bool first = true; static bool first = true;
static bool many; static bool many;
@ -63,6 +64,9 @@ main(int argc, char *argv[])
case 'l': case 'l':
lflag = true; lflag = true;
break; break;
case 'r':
sortorder = -1;
break;
case 't': case 't':
tflag = true; tflag = true;
break; break;
@ -94,9 +98,9 @@ entcmp(const void *va, const void *vb)
const Entry *a = va, *b = vb; const Entry *a = va, *b = vb;
if(tflag) if(tflag)
return b->mtime - a->mtime; return sortorder * (b->mtime - a->mtime);
else else
return strcmp(a->name, b->name); return sortorder * (strcmp(a->name, b->name));
} }
void void