X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=sys%2Fsrc%2Fcmd%2Ffile.c;h=bd9d1afb5b492146277b6c53411a34177dbc2026;hb=ac88ce4f7f19be1aae1fdf390fa870b4be8dc3f5;hp=b64bb13a486933a53e6cfeea1d5093f58bc2ed3c;hpb=3edac8032702e5fb30dd78591ec0d104f83cfa33;p=plan9front.git

diff --git a/sys/src/cmd/file.c b/sys/src/cmd/file.c
index b64bb13a4..bd9d1afb5 100644
--- a/sys/src/cmd/file.c
+++ b/sys/src/cmd/file.c
@@ -152,6 +152,7 @@ int	ismbox(void);
 int	islimbo(void);
 int	istga(void);
 int	ismp3(void);
+int	ismp4(void);
 int	ismung(void);
 int	isp9bit(void);
 int	isp9font(void);
@@ -167,6 +168,7 @@ int	longoff(void);
 int	istar(void);
 int	isface(void);
 int	isexec(void);
+int	isudiff(void);
 int	p9bitnum(char*, int*);
 int	p9subfont(uchar*);
 void	print_utf(void);
@@ -183,6 +185,7 @@ int	(*call[])(void) =
 	iff,		/* interchange file format (strings) */
 	longoff,	/* recognizable by 4 bytes at some offset */
 	isoffstr,	/* recognizable by string at some offset */
+	isudiff,	/* unified diff output */
 	isrfc822,	/* email file */
 	ismbox,		/* mail box */
 	istar,		/* recognizable by tar checksum */
@@ -198,6 +201,7 @@ int	(*call[])(void) =
 	isicocur,		/* windows icon or cursor file */
 	isface,		/* ascii face file */
 	istga,
+	ismp4,
 	ismp3,
 
 	/* last resorts */
@@ -982,6 +986,25 @@ char*	html_string[] = {
 	0,
 };
 
+int
+isudiff(void)
+{
+	char *p;
+
+	p = (char*)buf;
+	if((p = strstr(p, "diff")) != nil)
+	if((p = strchr(p, '\n')) != nil)
+	if(strncmp(++p, "--- ", 4) == 0)
+	if((p = strchr(p, '\n')) != nil)
+	if(strncmp(++p, "+++ ", 4) == 0)
+	if((p = strchr(p, '\n')) != nil)
+	if(strncmp(++p, "@@ ", 3) == 0){
+		print("%s\n", mime ? "text/plain" : "unified diff output");
+		return 1;
+	}
+	return 0;
+}
+
 int
 ishtml(void)
 {
@@ -1221,6 +1244,24 @@ ismp3(void)
 	return 0;
 }
 
+int
+ismp4(void)
+{
+	if(nbuf <= 12)
+		return 0;
+	if(memcmp(&buf[4], "ftyp", 4) != 0)
+		return 0;
+	if(memcmp(&buf[8], "isom", 4) == 0){
+		print("%s\n", mime ? "video/mp4" : "mp4 video");
+		return 1;
+	}
+	if(memcmp(&buf[8], "M4A ", 4) == 0){
+		print("%s\n", mime ? "audio/m4a" : "m4a audio");
+		return 1;
+	}
+	return 0;
+}
+
 /*
  * low entropy means encrypted
  */