procps: remove all global variables

   text    data     bss     dec     hex filename
   1462      14      24    1500     5dc busybox.t2/procps/ps.o
   1484       0       0    1484     5cc busybox.t3/procps/ps.o
   3122       0     252    3374     d2e busybox.t1/procps/top.o
   3117       0       0    3117     c2d busybox.t3/procps/top.o

2 files changed, 72 insertions, 41 deletions

diff --git a/procps/ps.c b/procps/ps.c
index 0c9b71e09..5128c3d59 100644
--- a/procps/ps.c
+++ b/procps/ps.c
@@ -109,7 +109,7 @@ static const ps_out_t out_spec[] = {
 //      { sizeof("RGROUP" )-1, "rgroup","RGROUP" ,func_rgroup,PSSCAN_UIDGID          },
 //      { sizeof("RUSER"  )-1, "ruser" ,"RUSER"  ,func_ruser ,PSSCAN_UIDGID          },
 //      { sizeof("TIME"   )-1, "time"  ,"TIME"   ,func_time  ,PSSCAN_                },
-        { sizeof("TT"     )-1, "tty"   ,"TT"     ,func_tty   ,PSSCAN_TTY             },
+        { 6                  , "tty"   ,"TT"     ,func_tty   ,PSSCAN_TTY             },
         { 4                  , "vsz"   ,"VSZ"    ,func_vsz   ,PSSCAN_VSZ             },
 // Not mandated by POSIX, but useful:
         { 4                  , "rss"   ,"RSS"    ,func_rss   ,PSSCAN_RSS             },
@@ -117,13 +117,25 @@ static const ps_out_t out_spec[] = {
 
 #define VEC_SIZE(v) ( sizeof(v) / sizeof((v)[0]) )
 
-static ps_out_t* out;
-static int out_cnt;
-static int print_header;
-static int ps_flags;
-static char *buffer;
-static unsigned terminal_width;
+#define DEFAULT_O_STR "pid,user" /* TODO: ,vsz,stat */ ",args"
 
+struct globals {
+        ps_out_t* out;
+        int out_cnt;
+        int print_header;
+        int need_flags;
+        char *buffer;
+        unsigned terminal_width;
+        char default_o[sizeof(DEFAULT_O_STR)];
+};
+#define G (*(struct globals*)&bb_common_bufsiz1)
+#define out            (G.out           )
+#define out_cnt        (G.out_cnt       )
+#define print_header   (G.print_header  )
+#define need_flags     (G.need_flags    )
+#define buffer         (G.buffer        )
+#define terminal_width (G.terminal_width)
+#define default_o      (G.default_o     )
 
 static ps_out_t* new_out_t(void)
 {
@@ -186,7 +198,7 @@ static void post_process(void)
         int i;
         int width = 0;
         for (i = 0; i < out_cnt; i++) {
-                ps_flags |= out[i].ps_flags;
+                need_flags |= out[i].ps_flags;
                 if (out[i].header[0]) {
                         print_header = 1;
                 }
@@ -241,15 +253,15 @@ static void format_process(const procps_status_t *ps)
         printf("%.*s\n", terminal_width, buffer);
 }
 
-/* Cannot be const: parse_o() will choke */
-static char default_o[] = "pid,user" /* TODO: ,vsz,stat */ ",args";
-
 int ps_main(int argc, char **argv);
 int ps_main(int argc, char **argv)
 {
         procps_status_t *p;
         llist_t* opt_o = NULL;
 
+        /* Cannot be const: parse_o() will choke */
+        strcpy(default_o, DEFAULT_O_STR);
+
         // POSIX:
         // -a  Write information for all processes associated with terminals
         //     Implementations may omit session leaders from this list
@@ -282,7 +294,7 @@ int ps_main(int argc, char **argv)
         format_header();
 
         p = NULL;
-        while ((p = procps_scan(p, ps_flags))) {
+        while ((p = procps_scan(p, need_flags))) {
                 format_process(p);
         }
 
diff --git a/procps/top.c b/procps/top.c
index 7d30936a8..580c30050 100644
--- a/procps/top.c
+++ b/procps/top.c
@@ -31,7 +31,7 @@
 #include "busybox.h"
 
 
-typedef struct {
+typedef struct top_status_t {
         unsigned long vsz;
 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
         unsigned long ticks;
@@ -42,24 +42,60 @@ typedef struct {
         char state[4];
         char comm[COMM_LEN];
 } top_status_t;
-static top_status_t *top;
-static int ntop;
+
+typedef struct jiffy_counts_t{
+        unsigned long long usr,nic,sys,idle,iowait,irq,softirq,steal;
+        unsigned long long total;
+        unsigned long long busy;
+} jiffy_counts_t;
+
 /* This structure stores some critical information from one frame to
    the next. Used for finding deltas. */
-struct save_hist {
+typedef struct save_hist {
         unsigned long ticks;
         unsigned pid;
+} save_hist;
+
+typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q);
+
+enum { SORT_DEPTH = 3 };
+
+struct globals {
+        top_status_t *top;
+        int ntop;
+#if ENABLE_FEATURE_USE_TERMIOS
+        struct termios initial_settings;
+#endif
+#if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+        cmp_funcp sort_function;
+#else
+        cmp_funcp sort_function[SORT_DEPTH];
+        struct save_hist *prev_hist;
+        int prev_hist_count;
+        jiffy_counts_t jif, prev_jif;
+        /* int hist_iterations; */
+        unsigned total_pcpu;
+        /* unsigned long total_vsz; */
+#endif
 };
+#define G (*(struct globals*)&bb_common_bufsiz1)
+#define top              (G.top               )
+#define ntop             (G.ntop              )
+#if ENABLE_FEATURE_USE_TERMIOS
+#define initial_settings (G. initial_settings )
+#endif
+#define sort_function    (G.sort_function     )
 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
-static struct save_hist *prev_hist;
-static int prev_hist_count;
-/* static int hist_iterations; */
-static unsigned total_pcpu;
-/* static unsigned long total_vsz; */
+#define prev_hist        (G.prev_hist         )
+#define prev_hist_count  (G.prev_hist_count   )
+#define jif              (G.jif               )
+#define prev_jif         (G.prev_jif          )
+#define total_pcpu       (G.total_pcpu        )
 #endif
 
 #define OPT_BATCH_MODE (option_mask32 & 0x4)
 
+
 #if ENABLE_FEATURE_USE_TERMIOS
 static int pid_sort(top_status_t *P, top_status_t *Q)
 {
@@ -77,17 +113,7 @@ static int mem_sort(top_status_t *P, top_status_t *Q)
 }
 
 
-typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q);
-
-#if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
-
-static cmp_funcp sort_function;
-
-#else
-
-enum { SORT_DEPTH = 3 };
-
-static cmp_funcp sort_function[SORT_DEPTH];
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
 
 static int pcpu_sort(top_status_t *P, top_status_t *Q)
 {
@@ -116,12 +142,6 @@ static int mult_lvl_cmp(void* a, void* b)
 }
 
 
-typedef struct {
-        unsigned long long usr,nic,sys,idle,iowait,irq,softirq,steal;
-        unsigned long long total;
-        unsigned long long busy;
-} jiffy_counts_t;
-static jiffy_counts_t jif, prev_jif;
 static void get_jiffy_counts(void)
 {
         FILE* fp = xfopen("stat", "r");
@@ -391,8 +411,6 @@ static void clearmems(void)
 #include <termios.h>
 #include <signal.h>
 
-static struct termios initial_settings;
-
 static void reset_term(void)
 {
         tcsetattr(0, TCSANOW, (void *) &initial_settings);
@@ -426,8 +444,9 @@ int top_main(int argc, char **argv)
         unsigned char c;
 #endif /* FEATURE_USE_TERMIOS */
 
-        /* do normal option parsing */
         interval = 5;
+
+        /* do normal option parsing */
         opt_complementary = "-";
         getopt32(argc, argv, "d:n:b", &sinterval, &siterations);
         if (option_mask32 & 0x1) interval = xatou(sinterval); // -d