Very early stub of sed, does nothing yet.

3 files changed, 65 insertions, 4 deletions

diff --git a/toys/Config.in b/toys/Config.in
index 4fabd6ef..f1083233 100644
--- a/toys/Config.in
+++ b/toys/Config.in
@@ -330,6 +330,15 @@ config READLINK_F
 	  -f	Show full cannonical path, with no symlinks in it.  Returns
 		nonzero if nothing could currently exist at this location.
 
+config SED
+	bool "sed"
+	default n
+	help
+	  usage: sed [-irn] {command | [-e command]...} [FILE...]
+
+	  Stream EDitor, transforms text by appling commands to each line
+	  of input.
+
 config SHA1SUM
 	bool "sha1sum"
 	default y
diff --git a/toys/sed.c b/toys/sed.c
new file mode 100644
index 00000000..39753399
--- /dev/null
+++ b/toys/sed.c
@@ -0,0 +1,46 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * sed.c - Stream editor.
+ *
+ * See http://www.opengroup.org/onlinepubs/009695399/utilities/sed.c
+ */
+
+#include "toys.h"
+#include "lib/xregcomp.h"
+
+#define TT toy.sed
+
+struct sed_command {
+	// Doubly linked list of commands.
+	struct sed_command *next, *prev;
+
+	// Regexes for s/match/data/ and /match_begin/,/match_end/command
+	regex_t *match, *match_begin, *match_end;
+
+	// For numeric ranges ala 10,20command
+	int first_line, last_line;
+
+	// Which match to replace, 0 for all.
+	int which;
+
+	// s and w commands can write to a file.  Slight optimization: we use 0
+	// instead of -1 to mean no file here, because even when there's no stdin
+	// our input file would take fd 0.
+	int outfd;
+
+	// Data string for (saicytb)
+	char *data;
+
+	// Which command letter is this?
+	char command;
+};
+
+void sed_main(void)
+{
+	struct arg_list *test;
+
+	for (test = TT.commands; test; test = test->next)
+		dprintf(2,"command=%s\n",test->arg);
+
+	printf("Hello world\n");
+}
diff --git a/toys/toylist.h b/toys/toylist.h
index 2dd8620f..1f01c547 100644
--- a/toys/toylist.h
+++ b/toys/toylist.h
@@ -53,6 +53,10 @@ struct mke2fs_data {
 	struct ext2_superblock sb;
 };
 
+struct mkfifo_data {
+	char *mode;
+};
+
 struct netcat_data {
 	char *filename;        // -f read from filename instead of network
 	long quit_delay;       // -q Exit after EOF from stdin after # seconds.
@@ -77,6 +81,10 @@ struct patch_data {
 	char *tempname, *oldname;
 };
 
+struct sed_data {
+	struct arg_list *commands;
+};
+
 struct sleep_data {
 	long seconds;
 };
@@ -91,10 +99,6 @@ struct toysh_data {
 	char *command;
 };
 
-struct mkfifo_data {
-	char *mode;
-};
-
 extern union toy_union {
 	struct dmesg_data dmesg;
 	struct df_data df;
@@ -103,6 +107,7 @@ extern union toy_union {
 	struct netcat_data netcat;
 	struct oneit_data oneit;
 	struct patch_data patch;
+	struct sed_data sed;
 	struct sleep_data sleep;
 	struct touch_data touch;
 	struct toysh_data toysh;
@@ -155,6 +160,7 @@ USE_ONEIT(NEWTOY(oneit, "+<1c:p", TOYFLAG_SBIN))
 USE_PATCH(NEWTOY(patch, "up#i:R", TOYFLAG_USR|TOYFLAG_BIN))
 USE_PWD(NEWTOY(pwd, NULL, TOYFLAG_BIN))
 USE_READLINK(NEWTOY(readlink, "<1f", TOYFLAG_BIN))
+USE_SED(NEWTOY(sed, "irne*", TOYFLAG_BIN))
 USE_TOYSH(OLDTOY(sh, toysh, "c:i", TOYFLAG_BIN))
 USE_SHA1SUM(NEWTOY(sha1sum, NULL, TOYFLAG_USR|TOYFLAG_BIN))
 USE_SLEEP(NEWTOY(sleep, "<1", TOYFLAG_BIN))