libbb: introduce fputc_printable (from ed)

netstat: print control chars as ^C etc
vi: style fixlet

function                                             old     new   delta
fputc_printable                                        -     100    +100
unix_do_one                                          451     487     +36
printLines                                           258     190     -68
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/1 up/down: 136/-68)            Total: 68 bytes

1 files changed, 10 insertions, 7 deletions

diff --git a/networking/netstat.c b/networking/netstat.c
index 29c2384a4..348abd8ad 100644
--- a/networking/netstat.c
+++ b/networking/netstat.c
@@ -349,13 +349,9 @@ static int unix_do_one(int nr, char *line)
         const char *ss_proto, *ss_state, *ss_type;
         char ss_flags[32];
 
-        /* TODO: currently we stop at first NUL byte. Is it a problem? */
-
         if (nr == 0)
                 return 0; /* skip header */
 
-        *strchrnul(line, '\n') = '\0';
-
         /* 2.6.15 may report lines like "... @/tmp/fam-user-^@^@^@^@^@^@^@..."
          * Other users report long lines filled by NUL bytes. 
          * (those ^@ are NUL bytes too). We see them as empty lines. */
@@ -443,9 +439,16 @@ static int unix_do_one(int nr, char *line)
                 strcat(ss_flags, "N ");
         strcat(ss_flags, "]");
 
-        printf("%-5s %-6ld %-11s %-10s %-13s %6lu %s\n",
-                ss_proto, refcnt, ss_flags, ss_type, ss_state, inode,
-                line + path_ofs);
+        printf("%-5s %-6ld %-11s %-10s %-13s %6lu ",
+                ss_proto, refcnt, ss_flags, ss_type, ss_state, inode
+                );
+
+        /* TODO: currently we stop at first NUL byte. Is it a problem? */
+        line += path_ofs;
+        *strchrnul(line, '\n') = '\0';
+        while (*line)
+                fputc_printable(*line++, stdout);
+        bb_putchar('\n');
         return 0;
 }