still sig11 w/ "ps f"

proc/escape.c

@@ -9,9 +9,25 @@
  * GNU Library General Public License for more details.
  */                                 
 #include <sys/types.h>
-#include "../proc/procps.h"
+#include <string.h>
-#include "common.h"
+#include "procps.h"
+#include "escape.h"
+#include "readproc.h"
 
+// What it would be for a UTF-8 locale:
+// "Z-------------------------------"
+// "********************************"
+// "********************************"
+// "*******************************-"
+// "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"  Trailing UTF-8, and badness in 8-bit.
+// "yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy"  Trailing UTF-8, and safe in 8-bit.
+// "--222222222222222222222222222222"
+// ".333333333333.3.44444444555566--"  The '.' means '3', with problem chars.
+//
+// Problems include non-shortest forms, UTF-16, and non-characters.
+// The 4-byte, 5-byte, and 6-byte sequences are full of trouble too.
+
+#if 0
 /* sanitize a string, without the nice BSD library function:     */
 /* strvis(vis_args, k->ki_args, VIS_TAB | VIS_NL | VIS_NOSLASH)  */
 int octal_escape_str(char *restrict dst, const char *restrict src, size_t n){
@@ -57,9 +73,10 @@ leave:
   *(dst++) = '\0';
   return i;
 }
+#endif
 
 /* sanitize a string via one-way mangle */
-int simple_escape_str(char *restrict dst, const char *restrict src, size_t n){
+int escape_str(char *restrict dst, const char *restrict src, size_t bytes){
   unsigned char c;
   size_t i;
   const char codes[] =
@@ -71,7 +88,8 @@ int simple_escape_str(char *restrict dst, const char *restrict src, size_t n){
   "********************************"
   "********************************"
   "********************************";
-  for(i=0; i<n;){
+  bytes--;  // allow room for NUL character
+  for(i=0; i<bytes;){
     c = (unsigned char) *(src++);
     switch(codes[c]){
     case 'Z':
@@ -88,21 +106,70 @@ int simple_escape_str(char *restrict dst, const char *restrict src, size_t n){
   }
 leave:
   *(dst++) = '\0';
-  return i;
+  return i+1;        // bytes of text, excluding the NUL
 }
 
-/* escape a string as desired */
+/////////////////////////////////////////////////
-int escape_str(char *restrict dst, const char *restrict src, size_t n){
-  return simple_escape_str(dst, src, n);
-}
 
-/* escape an argv or environment string array */
+// escape an argv or environment string array
-int escape_strlist(char *restrict dst, const char *restrict const *restrict src, size_t n){
+//
+// bytes arg means sizeof(buf)
+int escape_strlist(char *restrict dst, const char *restrict const *restrict src, size_t bytes){
   size_t i = 0;
-  while(*src){
+
-    i += simple_escape_str(dst+i, *src, n-i);
+//if(!*src){        just never call this function without checking first
-    if((n-i > 1) && src[1]) dst[i++] = ' ';
+//  do something nice
+//}
+
+  for(;;){
+    i += escape_str(dst+i, *src, bytes-i);
+    if(bytes-i < 3) break;  // need room for space, a character, and the NUL
     src++;
+    if(!*src) break;  // need something to print
+    dst[i++] = ' ';
   }
-  return i;
+  return i;    // bytes of text, excluding the NUL
+}
+
+///////////////////////////////////////////////////
+
+int escape_command(char *restrict const outbuf, const proc_t *restrict const pp, int bytes, int glyphs, unsigned flags){
+  int overhead = 1;  // the trailing NUL
+  int end = 0;
+
+  if(bytes > glyphs+1) bytes=glyphs+1; // FIXME: assumes 8-bit locale
+
+  if(flags & ESC_ARGS){
+    const char **lc = (const char**)pp->cmdline;
+    if(lc && *lc) return escape_strlist(outbuf, lc, bytes);
+  }
+  if(flags & ESC_BRACKETS){
+    overhead += 2;
+  }
+  if(flags & ESC_DEFUNCT){
+    if(pp->state=='Z') overhead += 10;    // chars in " <defunct>"
+    else flags &= ~ESC_DEFUNCT;
+  }
+  if(overhead >= bytes){  // if no room for even one byte of the command name
+    // you'd damn well better have _some_ space
+    outbuf[0] = '-';
+    outbuf[1] = '\0';
+    return 1;
+  }
+  if(flags & ESC_BRACKETS){
+    outbuf[end++] = '[';
+  }
+  end += escape_str(outbuf+end, pp->cmd, bytes-overhead);
+
+  // Hmmm, do we want "[foo] <defunct>" or "[foo <defunct>]"?
+  if(flags & ESC_BRACKETS){
+    outbuf[end++] = ']';
+  }
+  if(flags & ESC_DEFUNCT){
+    memcpy(outbuf+end, " <defunct>", 10);
+    end += 10;
+  }
+
+  outbuf[end] = '\0';
+  return end;  // bytes or glyphs, not including the NUL
 }

proc/escape.h

@@ -0,0 +1,23 @@
+#ifndef PROCPS_PROC_ESCAPE_H
+#define PROCPS_PROC_ESCAPE_H
+
+//#include <stdio.h>
+#include <sys/types.h>
+#include "procps.h"
+#include "readproc.h"
+
+EXTERN_C_BEGIN
+
+#define ESC_ARGS     0x1  // try to use cmdline instead of cmd
+#define ESC_BRACKETS 0x2  // if using cmd, put '[' and ']' around it
+#define ESC_DEFUNCT  0x4  // mark zombies with " <defunct>"
+
+extern int escape_strlist(char *restrict dst, const char *restrict const *restrict src, size_t n);
+extern int escape_str(char *restrict dst, const char *restrict src, size_t n);
+extern int octal_escape_str(char *restrict dst, const char *restrict src, size_t n);
+extern int simple_escape_str(char *restrict dst, const char *restrict src, size_t n);
+
+extern int escape_command(char *restrict const outbuf, const proc_t *restrict const pp, int bytes, int glyphs, unsigned flags);
+
+EXTERN_C_END
+#endif

proc/readproc.c

@@ -171,9 +171,8 @@ static void status2proc(const char *S, proc_t *restrict P){
 
 
 
-/* Reads /proc/*/stat files, being careful not to trip over processes with
+// Reads /proc/*/stat files, being careful not to trip over processes with
- * names like ":-) 1 2 3 4 5 6".
+// names like ":-) 1 2 3 4 5 6".
- */
 static void stat2proc(const char* S, proc_t *restrict P) {
     unsigned num;
     char* tmp;

ps/common.h

@@ -215,15 +215,6 @@ typedef struct sf_node {
   int sf_code;
 } sf_node;
 
-
-/*********************** GENERAL GLOBALS *************************/
-
-/* escape.c */
-extern int escape_strlist(char *restrict dst, const char *restrict const *restrict src, size_t n);
-extern int escape_str(char *restrict dst, const char *restrict src, size_t n);
-extern int octal_escape_str(char *restrict dst, const char *restrict src, size_t n);
-extern int simple_escape_str(char *restrict dst, const char *restrict src, size_t n);
-
 /********************* UNDECIDED GLOBALS **************/
 
 /* output.c */

ps/output.c

@@ -65,6 +65,7 @@
 #include "../proc/wchan.h"
 #include "../proc/procps.h"
 #include "../proc/devname.h"
+#include "../proc/escape.h"
 #include "common.h"
 
 #ifdef FLASK_LINUX