ncurses 6.0 - patch 20170819

[ncurses.git] / progs / tabs.c

diff --git a/progs/tabs.c b/progs/tabs.c
index 7ed3007549d8ac7ea2d6bba11481b5e3c6bb0cf4..d7877baff7a5499c8127bf21cc1856cf2dbd1a7f 100644 (file)
--- a/progs/tabs.c
+++ b/progs/tabs.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (c) 2008-2012,2013 Free Software Foundation, Inc.              *
+ * Copyright (c) 2008-2015,2016 Free Software Foundation, Inc.              *
  *                                                                          *
  * Permission is hereby granted, free of charge, to any person obtaining a  *
  * copy of this software and associated documentation files (the            *
@@ -36,12 +36,13 @@
 
 #define USE_LIBTINFO
 #include <progs.priv.h>
+#include <tty_settings.h>
 
-MODULE_ID("$Id: tabs.c,v 1.34 2013/06/11 08:18:27 tom Exp $")
+MODULE_ID("$Id: tabs.c,v 1.38 2016/12/31 15:10:52 tom Exp $")
 
 static void usage(void) GCC_NORETURN;
 
-static char *prg_name;
+const char *_nc_progname;
 static int max_cols;
 
 static void
@@ -79,7 +80,7 @@ do_tabs(int *tab_list)
            break;
        }
     }
-    putchar('\n');
+    putchar('\r');
 }
 
 static int *
@@ -103,7 +104,7 @@ decode_tabs(const char *tab_list)
            if (n > 0 && result[n] <= result[n - 1]) {
                fprintf(stderr,
                        "%s: tab-stops are not in increasing order: %d %d\n",
-                       prg_name, value, result[n - 1]);
+                       _nc_progname, value, result[n - 1]);
                free(result);
                result = 0;
                break;
@@ -288,6 +289,7 @@ add_to_tab_list(char **append, const char *value)
 
        *append = result;
     }
+    free(copied);
     return result;
 }
 
@@ -307,17 +309,17 @@ legal_tab_list(const char *tab_list)
                if (!(isdigit(ch) || ch == ',' || ch == '+')) {
                    fprintf(stderr,
                            "%s: unexpected character found '%c'\n",
-                           prg_name, ch);
+                           _nc_progname, ch);
                    result = FALSE;
                    break;
                }
            }
        } else {
-           fprintf(stderr, "%s: trailing comma found '%s'\n", prg_name, tab_list);
+           fprintf(stderr, "%s: trailing comma found '%s'\n", _nc_progname, tab_list);
            result = FALSE;
        }
     } else {
-       fprintf(stderr, "%s: no tab-list given\n", prg_name);
+       fprintf(stderr, "%s: no tab-list given\n", _nc_progname);
        result = FALSE;
     }
     return result;
@@ -338,36 +340,35 @@ skip_list(char *value)
 static void
 usage(void)
 {
-    static const char *msg[] =
+#define DATA(s) s "\n"
+    static const char msg[] =
     {
-       "Usage: tabs [options] [tabstop-list]"
-       ,""
-       ,"Options:"
-       ,"  -0       reset tabs"
-       ,"  -8       set tabs to standard interval"
-       ,"  -a       Assembler, IBM S/370, first format"
-       ,"  -a2      Assembler, IBM S/370, second format"
-       ,"  -c       COBOL, normal format"
-       ,"  -c2      COBOL compact format"
-       ,"  -c3      COBOL compact format extended"
-       ,"  -d       debug (show ruler with expected/actual tab positions)"
-       ,"  -f       FORTRAN"
-       ,"  -n       no-op (do not modify terminal settings)"
-       ,"  -p       PL/I"
-       ,"  -s       SNOBOL"
-       ,"  -u       UNIVAC 1100 Assembler"
-       ,"  -T name  use terminal type 'name'"
-       ,"  -V       print version"
-       ,""
-       ,"A tabstop-list is an ordered list of column numbers, e.g., 1,11,21"
-       ,"or 1,+10,+10 which is the same."
+       DATA("Usage: tabs [options] [tabstop-list]")
+       DATA("")
+       DATA("Options:")
+       DATA("  -0       reset tabs")
+       DATA("  -8       set tabs to standard interval")
+       DATA("  -a       Assembler, IBM S/370, first format")
+       DATA("  -a2      Assembler, IBM S/370, second format")
+       DATA("  -c       COBOL, normal format")
+       DATA("  -c2      COBOL compact format")
+       DATA("  -c3      COBOL compact format extended")
+       DATA("  -d       debug (show ruler with expected/actual tab positions)")
+       DATA("  -f       FORTRAN")
+       DATA("  -n       no-op (do not modify terminal settings)")
+       DATA("  -p       PL/I")
+       DATA("  -s       SNOBOL")
+       DATA("  -u       UNIVAC 1100 Assembler")
+       DATA("  -T name  use terminal type 'name'")
+       DATA("  -V       print version")
+       DATA("")
+       DATA("A tabstop-list is an ordered list of column numbers, e.g., 1,11,21")
+       DATA("or 1,+10,+10 which is the same.")
     };
-    unsigned n;
+#undef DATA
 
     fflush(stdout);
-    for (n = 0; n < SIZEOF(msg); ++n) {
-       fprintf(stderr, "%s\n", msg[n]);
-    }
+    fputs(msg, stderr);
     ExitProgram(EXIT_FAILURE);
 }
 
@@ -381,8 +382,12 @@ main(int argc, char *argv[])
     NCURSES_CONST char *term_name = 0;
     char *append = 0;
     const char *tab_list = 0;
+    TTY tty_settings;
+    int fd;
+
+    _nc_progname = _nc_rootname(argv[0]);
 
-    prg_name = _nc_rootname(argv[0]);
+    fd = save_tty_settings(&tty_settings);
 
     if ((term_name = getenv("TERM")) == 0)
        term_name = "ansi+tabs";
@@ -506,18 +511,18 @@ main(int argc, char *argv[])
        }
     }
 
-    setupterm(term_name, STDOUT_FILENO, (int *) 0);
+    setupterm(term_name, fd, (int *) 0);
 
     max_cols = (columns > 0) ? columns : 80;
 
     if (!VALID_STRING(clear_all_tabs)) {
        fprintf(stderr,
                "%s: terminal type '%s' cannot reset tabs\n",
-               prg_name, term_name);
+               _nc_progname, term_name);
     } else if (!VALID_STRING(set_tab)) {
        fprintf(stderr,
                "%s: terminal type '%s' cannot set tabs\n",
-               prg_name, term_name);
+               _nc_progname, term_name);
     } else if (legal_tab_list(tab_list)) {
        int *list = decode_tabs(tab_list);