[hackers] [sbase] Implement -u support for ls(1) || sin

[git]

commit df76e501180e57f43661fb1e0abae6f5c644c582
Author: sin <s...@2f30.org>
Date:   Wed Feb 18 16:29:46 2015 +0000

    Implement -u support for ls(1)

diff --git a/README b/README
index f8b92da..42f48d8 100644
--- a/README
+++ b/README
@@ -40,7 +40,7 @@ The following tools are implemented ('*' == finished, '#' == 
UTF-8 support,
 =* ln              yes                          none
 =* logger          yes                          none
 =* logname         yes                          none
-=  ls              no                           -C, -R, -u
+=  ls              no                           -C, -R
 =* md5sum          non-posix                    none
 =* mkdir           yes                          none
 =* mkfifo          yes                          none
diff --git a/ls.1 b/ls.1
index 7389350..5d8f1b2 100644
--- a/ls.1
+++ b/ls.1
@@ -1,4 +1,4 @@
-.Dd February 17, 2015
+.Dd February 18, 2015
 .Dt LS 1
 .Os sbase
 .Sh NAME
@@ -6,7 +6,7 @@
 .Nd list directory contents
 .Sh SYNOPSIS
 .Nm
-.Op Fl 1acdFHhiLlqrtU
+.Op Fl 1acdFHhiLlqrtUu
 .Op Ar file ...
 .Sh DESCRIPTION
 .Nm
@@ -44,6 +44,9 @@ Reverse the sort order.
 Sort files by last file status/modification time instead of by name.
 .It Fl U
 Keep the list unsorted.
+.It Fl u
+Use file's last access time instead of last modification time for
+sorting or printing.
 .El
 .Sh SEE ALSO
 .Xr stat 2
diff --git a/ls.c b/ls.c
index ab9d4c3..bb249ed 100644
--- a/ls.c
+++ b/ls.c
@@ -37,6 +37,7 @@ static int qflag = 0;
 static int rflag = 0;
 static int tflag = 0;
 static int Uflag = 0;
+static int uflag = 0;
 static int first = 1;
 static int many;
 
@@ -55,7 +56,12 @@ mkent(struct entry *ent, char *path, int dostat, int follow)
        ent->uid   = st.st_uid;
        ent->gid   = st.st_gid;
        ent->size  = st.st_size;
-       ent->t     = cflag ? st.st_ctime : st.st_mtime;
+       if (cflag)
+               ent->t = st.st_ctime;
+       else if (uflag)
+               ent->t = st.st_atime;
+       else
+               ent->t = st.st_mtime;
        ent->ino   = st.st_ino;
        if (S_ISLNK(ent->mode))
                ent->tmode = stat(path, &st) == 0 ? st.st_mode : 0;
@@ -247,7 +253,7 @@ ls(const struct entry *ent)
 static void
 usage(void)
 {
-       eprintf("usage: %s [-1acdFHhiLlqrtU] [file ...]\n", argv0);
+       eprintf("usage: %s [-1acdFHhiLlqrtUu] [file ...]\n", argv0);
 }
 
 int
@@ -265,6 +271,7 @@ main(int argc, char *argv[])
                break;
        case 'c':
                cflag = 1;
+               uflag = 0;
                break;
        case 'd':
                dflag = 1;
@@ -299,6 +306,10 @@ main(int argc, char *argv[])
        case 'U':
                Uflag = 1;
                break;
+       case 'u':
+               uflag = 1;
+               cflag = 0;
+               break;
        default:
                usage();
        } ARGEND;