Fix to avoid system call in text mode wherever possible.

  Robert Scheck <robert@fedoraproject.org>

2 files changed, 355 insertions, 1 deletions

diff --git a/configure.in b/configure.in
index df91806..076e2d8 100644
--- a/configure.in
+++ b/configure.in
@@ -74,7 +74,7 @@ dnl Fairly generic checks.
 dnl
 
 dnl Checks for system headers.
-AC_CHECK_HEADERS(sys/ioctl.h sys/time.h sys/sockio.h unistd.h)
+AC_CHECK_HEADERS([sgtty.h sys/ioctl.h sys/time.h sys/sockio.h termio.h termios.h unistd.h])
 
 dnl Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
diff --git a/tui.c b/tui.c
new file mode 100644
index 0000000..896451e
--- /dev/null
+++ b/tui.c
@@ -0,0 +1,354 @@
+/*
+ * tui.c:
+ *
+ * Based on ui.c from the original iftop sources.
+ *
+ * This user interface does not make use of curses. Instead, it prints its
+ * output to STDOUT. This output is activated by providing the '-t' flag.
+ *
+ */
+
+#include "config.h"
+
+#include <string.h>
+#include <stdio.h>
+#include <signal.h>
+#include <unistd.h>
+
+#if defined(HAVE_TERMIOS_H)
+#include <termios.h>
+#elif defined(HAVE_SGTTY_H) && defined(TIOCSETP)
+#include <sys/ioctl.h>
+#include <sgtty.h>
+#elif defined(HAVE_TERMIO_H)
+#include <sys/ioctl.h>
+#include <termio.h>
+#else
+#include <stdlib.h>
+#endif
+
+#include "sorted_list.h"
+#include "options.h"
+#include "ui_common.h"
+
+/* Width of the host column in the output */
+#define PRINT_WIDTH 40
+
+
+/*
+ * UI print function
+ */
+void tui_print() {
+  sorted_list_node* nn = NULL;
+  char host1[HOSTNAME_LENGTH], host2[HOSTNAME_LENGTH];
+  char buf0_10[10], buf1_10[10], buf2_10[10];
+  int j;
+  static char *label;
+  static char *labellong;
+  int l = 0;
+
+  if (!label) {
+    xfree(label);
+    label = (char *)calloc(PRINT_WIDTH + 1, 1);
+  }
+
+  if (!labellong) {
+    xfree(labellong);
+    labellong = (char *)calloc(PRINT_WIDTH + 1 + 9, 1);
+  }
+
+  if (options.paused ) {
+    return;
+  }
+
+  /* Headings */
+  snprintf(label, PRINT_WIDTH, "%-*s", PRINT_WIDTH, "Host name (port/service if enabled)");
+  printf("%s %s     %10s %10s %10s %10s\n", "   #", label, "last 2s", "last 10s", "last 40s", "cumulative");
+
+  /* Divider line */
+  for (j = 0; j < PRINT_WIDTH + 52; j++) {
+    printf("-");
+  }
+  printf("\n");
+
+  /* Traverse the list of all connections */
+  while((nn = sorted_list_next_item(&screen_list, nn)) != NULL && l < options.num_lines) {
+    /* Increment the line counter */
+    l++;
+
+    /* Get the connection information */
+    host_pair_line* screen_line = (host_pair_line*)nn->data;
+
+    /* Assemble host information */
+    sprint_host(host1, screen_line->ap.af, &(screen_line->ap.src6), screen_line->ap.src_port, screen_line->ap.protocol, PRINT_WIDTH, options.aggregate_src);
+    sprint_host(host2, screen_line->ap.af, &(screen_line->ap.dst6), screen_line->ap.dst_port, screen_line->ap.protocol, PRINT_WIDTH, options.aggregate_dest);
+
+    /* Send rate per connection */
+    printf("%4d %s%s", l, host1, " =>");
+    for(j = 0; j < HISTORY_DIVISIONS; j++) {
+      readable_size(screen_line->sent[j], buf0_10, 10, 1024, options.bandwidth_in_bytes);
+      printf(" %10s", buf0_10);
+    }
+    /* Cumulative sent data per connection */
+    readable_size(screen_line->total_sent, buf0_10, 10, 1024, 1);
+    printf(" %10s\n", buf0_10);
+
+    /* Receive rate per connection */
+    printf("     %s%s", host2, " <=");
+    for(j = 0; j < HISTORY_DIVISIONS; j++) {
+      readable_size(screen_line->recv[j], buf0_10, 10, 1024, options.bandwidth_in_bytes);
+      printf(" %10s", buf0_10);
+    }
+    /* Cumulative received data per connection */
+    readable_size(screen_line->total_recv, buf0_10, 10, 1024, 1);
+    printf(" %10s\n", buf0_10);
+  }
+
+  /* Divider line */
+  for (j = 0; j < PRINT_WIDTH + 52; j++) {
+    printf("-");
+  }
+  printf("\n");
+
+  /* Rate totals */
+  snprintf(labellong, PRINT_WIDTH + 9, "%-*s", PRINT_WIDTH + 9, "Total send rate:");
+  printf("%s ", labellong);
+  for(j = 0; j < HISTORY_DIVISIONS; j++) {
+    readable_size((((host_pair_line *)&totals)->sent[j]) , buf0_10, 10, 1024, options.bandwidth_in_bytes);
+    printf("%10s%c", buf0_10, j == HISTORY_DIVISIONS - 1 ? '\n' : ' ');
+  }
+
+  snprintf(labellong, PRINT_WIDTH + 9, "%-*s", PRINT_WIDTH + 9, "Total receive rate:");
+  printf("%s ", labellong);
+  for(j = 0; j < HISTORY_DIVISIONS; j++) {
+    readable_size((((host_pair_line *)&totals)->recv[j]) , buf0_10, 10, 1024, options.bandwidth_in_bytes);
+    printf("%10s%c", buf0_10, j == HISTORY_DIVISIONS - 1 ? '\n' : ' ');
+  }
+
+  snprintf(labellong, PRINT_WIDTH + 9, "%-*s", PRINT_WIDTH + 9, "Total send and receive rate:");
+  printf("%s ", labellong);
+  for(j = 0; j < HISTORY_DIVISIONS; j++) {
+    readable_size((((host_pair_line *)&totals)->sent[j] + ((host_pair_line *)&totals)->recv[j]) , buf0_10, 10, 1024, options.bandwidth_in_bytes);
+    printf("%10s%c", buf0_10, j == HISTORY_DIVISIONS - 1 ? '\n' : ' ');
+  }
+
+  /* Divider line */
+  for (j = 0; j < PRINT_WIDTH + 52; j++) {
+    printf("-");
+  }
+  printf("\n");
+
+  /* Peak traffic */
+  snprintf(labellong, PRINT_WIDTH + 9, "%-*s", PRINT_WIDTH + 9, "Peak rate (sent/received/total):");
+  readable_size(peaksent / RESOLUTION, buf0_10, 10, 1024, options.bandwidth_in_bytes);
+  readable_size(peakrecv / RESOLUTION, buf1_10, 10, 1024, options.bandwidth_in_bytes);
+  readable_size(peaktotal / RESOLUTION, buf2_10, 10, 1024, options.bandwidth_in_bytes);
+  printf("%s %10s %10s %10s\n", labellong, buf0_10, buf1_10, buf2_10);
+
+  /* Cumulative totals */
+  snprintf(labellong, PRINT_WIDTH + 9, "%-*s", PRINT_WIDTH + 9, "Cumulative (sent/received/total):");
+  readable_size(history_totals.total_sent, buf0_10, 10, 1024, 1);
+  readable_size(history_totals.total_recv, buf1_10, 10, 1024, 1);
+  readable_size(history_totals.total_recv + history_totals.total_sent, buf2_10, 10, 1024, 1);
+  printf("%s %10s %10s %10s\n", labellong, buf0_10, buf1_10, buf2_10);
+
+  /* Double divider line */
+  for (j = 0; j < PRINT_WIDTH + 52; j++) {
+    printf("=");
+  }
+  printf("\n\n");
+}
+
+
+/*
+ * Text interface data structure initializations.
+ */
+void tui_init() {
+  screen_list_init();
+  screen_hash = addr_hash_create();
+  service_hash = serv_hash_create();
+  serv_hash_initialise(service_hash);
+
+  printf("Listening on %s\n", options.interface);
+}
+
+
+/*
+ * Tick function indicating screen refresh
+ */
+void tui_tick(int print) {
+  if (print) {
+    tui_print();
+  }
+}
+
+
+/*
+ * Main UI loop. Code any interactive character inputs here.
+ */
+void tui_loop() {
+  int i;
+  extern sig_atomic_t foad;
+
+#if defined(HAVE_TERMIOS_H)
+  struct termios new_termios, old_termios;
+
+  tcgetattr(STDIN_FILENO, &old_termios);
+  new_termios = old_termios;
+  new_termios.c_lflag &= ~(ICANON|ECHO);
+  new_termios.c_cc[VMIN] = 1;
+  new_termios.c_cc[VTIME] = 0;
+  tcsetattr(STDIN_FILENO, TCSANOW, &new_termios);
+#elif defined(HAVE_SGTTY_H) && defined(TIOCSETP)
+  struct sgttyb new_tty, old_tty;
+
+  ioctl(STDIN_FILENO, TIOCGETP, &old_tty);
+  new_tty = old_tty;
+  new_tty.sg_flags &= ~(ICANON|ECHO);
+  ioctl(STDIN_FILENO, TIOCSETP, &new_tty);
+#elif defined(HAVE_TERMIO_H)
+  struct termio new_termio, old_termio;
+
+  ioctl(0, TCGETA, &old_termio);
+  new_termio = old_termio;
+  new_termio.c_lflag &= ~(ICANON|ECHO);
+  new_termio.c_cc[VMIN] = 1;
+  new_termio.c_cc[VTIME] = 0;
+  ioctl(0, TCSETA, &new_termio);
+#else
+  system("/bin/stty cbreak -echo >/dev/null 2>&1");
+#endif
+
+  while ((i = getchar()) != 'q' && foad == 0) {
+    switch (i) {
+      case 'u':
+        tick(1);
+        break;
+      case 'n':
+        options.dnsresolution ^= 1;
+        printf("DNS resolution is %s.\n\n", options.dnsresolution ? "ON" : "OFF");
+        tick(1);
+        break;
+      case 'N':
+        options.portresolution ^= 1;
+        printf("Port resolution is %s.\n\n", options.portresolution ? "ON" : "OFF");
+        tick(1);
+        break;
+      case 's':
+        options.aggregate_src ^= 1;
+        printf("%s source host\n\n", options.aggregate_src ? "Hide" : "Show");
+        tick(1);
+        break;
+      case 'd':
+        options.aggregate_dest ^= 1;
+        printf("%s destination host\n\n", options.aggregate_dest ? "Hide" : "Show");
+        tick(1);
+        break;
+      case 'S':
+        if (options.showports == OPTION_PORTS_OFF) {
+          options.showports = OPTION_PORTS_SRC;
+        }
+        else if (options.showports == OPTION_PORTS_DEST) {
+          options.showports = OPTION_PORTS_ON;
+        }
+        else if(options.showports == OPTION_PORTS_ON) {
+          options.showports = OPTION_PORTS_DEST;
+        }
+        else {
+          options.showports = OPTION_PORTS_OFF;
+        }
+        printf("Showing ports:%s%s%s%s.\n\n",
+          options.showports == OPTION_PORTS_SRC ? " src" : "",
+          options.showports == OPTION_PORTS_DEST ? " dest" : "",
+          options.showports == OPTION_PORTS_ON ? " both" : "",
+          options.showports == OPTION_PORTS_OFF ? " none" : "");
+        tick(1);
+        break;
+      case 'D':
+        if (options.showports == OPTION_PORTS_OFF) {
+          options.showports = OPTION_PORTS_DEST;
+        }
+        else if (options.showports == OPTION_PORTS_SRC) {
+          options.showports = OPTION_PORTS_ON;
+        }
+        else if(options.showports == OPTION_PORTS_ON) {
+          options.showports = OPTION_PORTS_SRC;
+        }
+        else {
+          options.showports = OPTION_PORTS_OFF;
+        }
+        printf("Showing ports:%s%s%s%s.\n\n",
+          options.showports == OPTION_PORTS_SRC ? " src" : "",
+          options.showports == OPTION_PORTS_DEST ? " dest" : "",
+          options.showports == OPTION_PORTS_ON ? " both" : "",
+          options.showports == OPTION_PORTS_OFF ? " none" : "");
+        tick(1);
+        break;
+      case 'p':
+        options.showports =
+         (options.showports == OPTION_PORTS_OFF) ?
+          OPTION_PORTS_ON :
+          OPTION_PORTS_OFF;
+        printf("Showing ports:%s%s%s%s.\n\n",
+          options.showports == OPTION_PORTS_SRC ? " src" : "",
+          options.showports == OPTION_PORTS_DEST ? " dest" : "",
+          options.showports == OPTION_PORTS_ON ? " both" : "",
+          options.showports == OPTION_PORTS_OFF ? " none" : "");
+        tick(1);
+        break;
+      case 'P':
+        options.paused ^= 1;
+        if (options.paused) {
+          printf("Pausing... press 'P' again to continue.\n");
+        }
+	else {
+	  printf("Continuing.\n\n");
+	  tick(1);
+	}
+	break;
+      case 'o':
+        options.freezeorder ^= 1;
+        printf("Order %s.\n\n", options.freezeorder ? "frozen" : "unfrozen");
+	tick(1);
+	break;
+      case '1':
+        options.sort = OPTION_SORT_DIV1;
+        printf("Sorting by column 1.\n\n");
+	tick(1);
+        break;
+      case '2':
+        options.sort = OPTION_SORT_DIV2;
+        printf("Sorting by column 2.\n\n");
+        tick(1);
+        break;
+      case '3':
+        options.sort = OPTION_SORT_DIV3;
+        printf("Sorting by column 3.\n\n");
+        tick(1);
+        break;
+      case '<':
+        options.sort = OPTION_SORT_SRC;
+        printf("Sorting by column source.\n\n");
+        tick(1);
+        break;
+      case '>':
+        options.sort = OPTION_SORT_DEST;
+        printf("Sorting by column destination.\n\n");
+        tick(1);
+        break;
+      default:
+        break;
+    }
+  }
+
+#if defined(HAVE_TERMIOS_H)
+  tcsetattr(STDIN_FILENO, TCSANOW, &old_termios);
+#elif defined(HAVE_SGTTY_H) && defined(TIOCSETP)
+  ioctl(0, TIOCSETP, &old_tty);
+#elif defined(HAVE_TERMIO_H)
+  ioctl(0, TCSETA, &old_termio);
+#else
+  system("/bin/stty -cbreak echo >/dev/null 2>&1");
+#endif
+}
+