error handling for freopen()

[smdp.git] / mdp.c

diff --git a/mdp.c b/mdp.c
index 0671ab6..3d38e3f 100644 (file)
--- a/mdp.c
+++ b/mdp.c
@@ -1,37 +1,79 @@
+/*
+ * mdp -- A command-line based markdown presentation tool.
+ * Copyright (C) 2014 Michael Goehler
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
 #include <errno.h>
 #include <getopt.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-#include "include/parser.h"
-#include "include/viewer.h"
+#include "include/mdp.h"
 
 void usage() {
-    fprintf(stderr, "Usage: mdp [OPTION]... [FILE]\n");
-    fprintf(stderr, "A command-line based markdown presentation tool.\n\n");
-    fprintf(stderr, "  -d, --debug   enable debug messages on STDERR\n");
-    fprintf(stderr, "                add it multiple times to increases debug level\n\n");
-    fprintf(stderr, "  -h, --help    display this help and exit\n");
-    fprintf(stderr, "\nWith no FILE, or when FILE is -, read standard input.\n\n");
+    fprintf(stderr, "%s", "Usage: mdp [OPTION]... [FILE]\n");
+    fprintf(stderr, "%s", "A command-line based markdown presentation tool.\n\n");
+    fprintf(stderr, "%s", "  -d, --debug     enable debug messages on STDERR\n");
+    fprintf(stderr, "%s", "                  add it multiple times to increases debug level\n");
+    fprintf(stderr, "%s", "  -f, --nofade    disable color fading in 256 color mode\n");
+    fprintf(stderr, "%s", "  -h, --help      display this help and exit\n");
+    fprintf(stderr, "%s", "  -i, --invert    swap black and white color\n");
+    fprintf(stderr, "%s", "  -t, --notrans   disable transparency in transparent terminal\n");
+    fprintf(stderr, "%s", "\nWith no FILE, or when FILE is -, read standard input.\n\n");
     exit(EXIT_FAILURE);
 }
 
+void version() {
+    printf("mdp %d.%d\n", MAJOR_VERSION, MINOR_VERSION);
+    printf("Copyright (C) 2014 Michael Goehler\n");
+    printf("License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.\n");
+    printf("This is free software: you are free to change and redistribute it.\n");
+    printf("There is NO WARRANTY, to the extent permitted by law.\n");
+    printf("\nWritten by Michael Goehler and others, see <https://github.com/visit1985/mdp/blob/master/AUTHORS>.\n");
+    exit(EXIT_SUCCESS);
+}
+
 int main(int argc, char *argv[]) {
+    int notrans = 0;
+    int nofade = 0;
+    int invert = 0;
 
     // define command-line options
     struct option longopts[] = {
-        { "debug", no_argument, 0, 'd' },
-        { "help",  no_argument, 0, 'h' },
+        { "debug",   no_argument, 0, 'd' },
+        { "nofade",  no_argument, 0, 'f' },
+        { "help",    no_argument, 0, 'h' },
+        { "invert",  no_argument, 0, 'i' },
+        { "notrans", no_argument, 0, 't' },
+        { "version", no_argument, 0, 'v' },
         { 0, 0, 0, 0 }
     };
 
     // parse command-line options
     int opt, debug = 0;
-    while ((opt = getopt_long(argc, argv, ":dh", longopts, NULL)) != -1) {
+    while ((opt = getopt_long(argc, argv, ":dfhitv", longopts, NULL)) != -1) {
         switch(opt) {
             case 'd': debug += 1; break;
+            case 'f': nofade = 1; break;
             case 'h': usage(); break;
+            case 'i': invert = 1; break;
+            case 't': notrans = 1; break;
+            case 'v': version(); break;
             case ':': fprintf(stderr, "%s: '%c' requires an argument\n", argv[0], optopt); usage(); break;
             case '?':
             default : fprintf(stderr, "%s: option '%c' is invalid\n", argv[0], optopt); usage(); break;
@@ -63,13 +105,23 @@ int main(int argc, char *argv[]) {
     deck_t *deck;
     deck = markdown_load(input);
 
-    //TODO close file
+    // close file
+    fclose(input);
+
+    // replace stdin with current tty if input was a pipe
+    if(input == stdin) {
+        input = freopen("/dev/tty", "rw", stdin);
+        if(!input) {
+            fprintf(stderr, "%s: %s: %s\n", argv[0], "/dev/tty", strerror(errno));
+            exit(EXIT_FAILURE);
+        }
+    }
 
     if(debug > 0) {
         markdown_debug(deck, debug);
     }
 
-    ncurses_display(deck, 0, 0);
+    ncurses_display(deck, notrans, nofade, invert);
 
     return(EXIT_SUCCESS);
 }