Remove libmagic, use file command.

The magic.mgc file gets created in the local directory, opening
the global file throws unwanted messages. So we are using the o/p
of the file command to determine if the file is a plain text file.

Makefile

@@ -6,7 +6,7 @@ MANPREFIX = $(PREFIX)/man
 #CPPFLAGS = -DDEBUG
 #CFLAGS = -g
 CFLAGS = -O3 -march=native
-LDLIBS = -lcurses -lmagic
+LDLIBS = -lcurses
 
 DISTFILES = noice.c strlcat.c strlcpy.c util.h config.def.h\
     noice.1 Makefile README LICENSE

config.def.h

@@ -9,6 +9,7 @@ char *idlecmd = "rain"; /* The screensaver program */
 
 struct assoc assocs[] = {
 	//{ "\\.(avi|mp4|mkv|mp3|ogg|flac|mov)$", "mpv" },
+	{ "\\.(c|cpp|h|txt|log)$", "vim" },
 	{ "\\.(wma|mp3|ogg|flac)$", "fmedia" },
 	//{ "\\.(png|jpg|gif)$", "feh" },
 	//{ "\\.(html|svg)$", "firefox" },

noice.c

@@ -17,7 +17,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <magic.h>
 
 #include "util.h"
 
@@ -39,6 +38,7 @@
 #define MIN(x, y) ((x) < (y) ? (x) : (y))
 #define ISODD(x) ((x) & 1)
 #define CONTROL(c) ((c) ^ 0x40)
+#define MAX_PATH_LEN 1024
 
 struct assoc {
 	char *regex; /* Regex to match on filename */
@@ -208,19 +208,6 @@ openwith(char *file)
 	char *bin = NULL;
 	int i;
 
-	const char *mime;
-	magic_t magic;
-
-	magic = magic_open(MAGIC_MIME_TYPE);
-	magic_load(magic, NULL);
-	magic_compile(magic, NULL);
-	mime = magic_file(magic, file);
-	DPRINTF_S(mime);
-
-	if (strcmp(mime, "text/plain") == 0)
-		return "vim";
-	magic_close(magic);
-
 	for (i = 0; i < LEN(assocs); i++) {
 		if (regcomp(&regex, assocs[i].regex,
 			    REG_NOSUB | REG_EXTENDED | REG_ICASE) != 0)
@@ -666,12 +653,30 @@ nochange:
 				goto begin;
 			case S_IFREG:
 				bin = openwith(newpath);
+				char *execvim = "vim";
+
 				if (bin == NULL) {
-					char cmd[512];
+					FILE *fp;
+					char cmd[MAX_PATH_LEN];
 					int status;
-					sprintf(cmd, "xdg-open \"%s\" > /dev/null 2>&1", newpath);
-					status = system(cmd);
-					continue;
+
+					snprintf(cmd, MAX_PATH_LEN, "file \"%s\"", newpath);
+					fp = popen(cmd, "r");
+					if (fp == NULL)
+						goto nochange;
+					if (fgets(cmd, MAX_PATH_LEN, fp) == NULL) {
+						pclose(fp);
+						goto nochange;
+					}
+					pclose(fp);
+
+					if (strstr(cmd, "ASCII text") != NULL)
+						bin = execvim;
+					else {
+						snprintf(cmd, MAX_PATH_LEN, "xdg-open \"%s\" > /dev/null 2>&1", newpath);
+						status = system(cmd);
+						continue;
+					}
 				}
 				exitcurses();
 				spawn(bin, newpath, NULL);