[Toybox] [PATCH] Implement ps -O.

[enh]

Also hard-code -W for Android to match traditional behavior, and use
NAME rather than CMDLINE by default (again, to match traditional behavior).
---
 toys/posix/ps.c | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/toys/posix/ps.c b/toys/posix/ps.c
index b06be42..8ee2b0f 100644
--- a/toys/posix/ps.c
+++ b/toys/posix/ps.c
@@ -35,7 +35,7 @@
  * TODO: iotop: Window size change: respond immediately. Why not padding
  *       at right edge? (Not adjusting to screen size at all? Header wraps?)

-USE_PS(NEWTOY(ps,
"k(sort)*P(ppid)*aAdeflno*p(pid)*s*t*u*U*g*G*wZ[!ol][+Ae]",
TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_LOCALE))
+USE_PS(NEWTOY(ps,
"k(sort)*P(ppid)*aAdeflno*O*p(pid)*s*t*u*U*g*G*wZ[!ol][!Oofl][+Ae]",
TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_LOCALE))
 // stayroot because iotop needs root to read other process' proc/$$/io
 USE_TOP(NEWTOY(top, ">0m" "p*u*d#=3<1n#<1bq",
TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_STAYROOT|TOYFLAG_LOCALE))
 USE_IOTOP(NEWTOY(iotop, ">0Aako"  "p*u*d#=3<1n#<1bq",
TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_STAYROOT|TOYFLAG_LOCALE))
@@ -76,6 +76,7 @@ config PS
     -f Full listing (-o USER:8=UID,PID,PPID,C,STIME,TTY,TIME,CMD)
     -l Long listing (-o F,S,UID,PID,PPID,C,PRI,NI,ADDR,SZ,WCHAN,TTY,TIME,CMD)
     -o Output the listed FIELDs, each with optional :size and/or =title
+    -O Output the listed FIELDs in addition to the defaults
     -Z Include LABEL

     Available -o FIELDs:
@@ -213,6 +214,7 @@ GLOBALS(
       struct arg_list *t;
       struct arg_list *s;
       struct arg_list *p;
+      struct arg_list *O;
       struct arg_list *o;
       struct arg_list *P;
       struct arg_list *k;
@@ -988,7 +990,7 @@ void ps_main(void)
   struct dirtree *dt;
   int i;

-  if (toys.optflags&FLAG_w) TT.width = 99999;
+  if (CFG_TOYBOX_ON_ANDROID || toys.optflags&FLAG_w) TT.width = 99999;
   shared_main();

   // parse command line options other than -o
@@ -1011,7 +1013,19 @@ void ps_main(void)
     comma_args(&Z, &TT.fields, "-Z", parse_ko);
   }
   if (TT.ps.o) comma_args(TT.ps.o, &TT.fields, "bad -o field", parse_ko);
-  else {
+  else if (TT.ps.O) {
+    struct arg_list al;
+
+    al.next = 0;
+    al.arg = CFG_TOYBOX_ON_ANDROID ?
+             "USER,PID,PPID,VSIZE,RSS,WCHAN:10,ADDR:10=PC,S" : "PID";
+    comma_args(&al, &TT.fields, 0, parse_ko);
+    comma_args(TT.ps.O, &TT.fields, "bad -O field", parse_ko);
+
+    al.next = 0;
+    al.arg = CFG_TOYBOX_ON_ANDROID ? "NAME" : "TTY,TIME,CMD";
+    comma_args(&al, &TT.fields, 0, parse_ko);
+  } else {
     struct arg_list al;

     al.next = 0;
@@ -1020,9 +1034,8 @@ void ps_main(void)
     else if (toys.optflags&FLAG_l)
       al.arg = "F,S,UID,PID,PPID,C,PRI,NI,ADDR,SZ,WCHAN,TTY,TIME,CMD";
     else if (CFG_TOYBOX_ON_ANDROID)
-      al.arg = "USER,PID,PPID,VSIZE,RSS,WCHAN:10,ADDR:10=PC,S,CMDLINE";
+      al.arg = "USER,PID,PPID,VSIZE,RSS,WCHAN:10,ADDR:10=PC,S,NAME";
     else al.arg = "PID,TTY,TIME,CMD";
-
     comma_args(&al, &TT.fields, 0, parse_ko);
   }
   dlist_terminate(TT.fields);
-- 
2.7.0.rc3.207.g0ac5344
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