1 files changed, 63 insertions, 0 deletions
diff --git a/commands/readf.c b/commands/readf.c
new file mode 100644
index 0000000000..6314c7ef23
--- /dev/null
+++ b/commands/readf.c
@@ -0,0 +1,63 @@
+#include <common.h>
+#include <command.h>
+#include <fs.h>
+#include <malloc.h>
+#include <linux/stat.h>
+#include <linux/ctype.h>
+#include <environment.h>
+
+static int do_readf(int argc, char *argv[])
+{
+	unsigned char *buf = NULL, *val;
+	char *variable, *filename;
+	struct stat s;
+	size_t size;
+	int ret, i;
+
+	if (argc != 3)
+		return COMMAND_ERROR_USAGE;
+
+	filename = argv[1];
+	variable = argv[2];
+
+	ret = stat(filename, &s);
+	if (ret)
+		goto out;
+
+	if (s.st_size > 1024) {
+		ret = -EFBIG;
+		goto out;
+	}
+
+	buf = read_file(filename, &size);
+	if (!buf)
+		goto out;
+
+	for (i = 0; i < size; i++) {
+		if (!isprint(buf[i])) {
+			buf[i] = '\0';
+			break;
+		}
+	}
+
+	val = strim(buf);
+
+	ret = setenv(variable, val);
+out:
+	free(buf);
+
+	return ret;
+}
+
+BAREBOX_CMD_HELP_START(readf)
+BAREBOX_CMD_HELP_USAGE("readf <file> <variable>\n")
+BAREBOX_CMD_HELP_SHORT("Read a single line of a file into a shell variable. Leading and trailing whitespaces\n")
+BAREBOX_CMD_HELP_SHORT("are removed, nonvisible characters are stripped. Input is limited to 1024\n")
+BAREBOX_CMD_HELP_SHORT("characters.\n")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(readf)
+	.cmd		= do_readf,
+	.usage		= "read file into variable",
+	BAREBOX_CMD_HELP(cmd_readf_help)
+BAREBOX_CMD_END