Command 'findstr' can be for example used to find the string
"MAC=1C:BA:8C:F3:82:BB" in file /dev/eeprom0 to set the
appropriate variable:
$ findstr -o 4 -l 17 -t eth0.ethaddr MAC /dev/eeprom0
Usage: findstr [OPTIONS] <STRING> <FILE>
Find string in file and print it
-o <offset> set offset of string which gets printed
-l <length> set length of string which gets printed
-t <var> print into variable instead of stdio
Signed-off-by: Christoph Fritz <chf.fritz@xxxxxxxxxxxxxx>
---
commands/Kconfig | 7 +++
commands/Makefile | 1 +
commands/findstr.c | 138 ++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 146 insertions(+)
create mode 100644 commands/findstr.c
diff --git a/commands/Kconfig b/commands/Kconfig
index 3ef8860..a2f817a 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -149,6 +149,13 @@ config CMD_GLOBAL
help
The global command allows to create global variables
+config CMD_FINDSTR
+ tristate
+ default n
+ prompt "findstr"
+ help
+ Find string in file.
+
endmenu
menu "file commands"
diff --git a/commands/Makefile b/commands/Makefile
index f927d21..b7c7e31 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -97,3 +97,4 @@ obj-$(CONFIG_CMD_READF) += readf.o
obj-$(CONFIG_CMD_MENUTREE) += menutree.o
obj-$(CONFIG_CMD_2048) += 2048.o
obj-$(CONFIG_CMD_REGULATOR) += regulator.o
+obj-$(CONFIG_CMD_FINDSTR) += findstr.o
\ No newline at end of file
diff --git a/commands/findstr.c b/commands/findstr.c
new file mode 100644
index 0000000..37cfee3
--- /dev/null
+++ b/commands/findstr.c
@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2014 Christoph Fritz <chf.fritz@xxxxxxxxxxxxxx>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ */
+
+/**
+ * @file
+ * @brief Find string in file
+ */
+
+#include <common.h>
+#include <command.h>
+#include <fs.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <getopt.h>
+#include <environment.h>
+
+extern char *mem_rw_buf;
+
+/**
+ * @param[in] argc Argument count from command line
+ * @param[in] argv List of input arguments
+ */
+static int do_findstr(int argc, char *argv[])
+{
+ int opt, fd, r, ret = 1;
+ loff_t len = 0, offset = 0, idx = 0;
+ u_char *s, *t = NULL, *v = (u_char *)mem_rw_buf;
+ unsigned int v_idx, s_idx = 0;
+
+ if (argc < 2)
+ return COMMAND_ERROR_USAGE;
+
+ while ((opt = getopt(argc, argv, "o:l:t:")) > 0) {
+ switch (opt) {
+ case 'o':
+ offset = simple_strtoul(optarg, NULL, 0);
+ break;
+ case 'l':
+ len = simple_strtoul(optarg, NULL, 0);
+ break;
+ case 't':
+ t = optarg;
+ break;
+ }
+ }
+
+ if (argc - optind != 2)
+ return COMMAND_ERROR_USAGE;
+
+ s = argv[optind];
+
+ fd = open(argv[optind+1], O_RDONLY);
+ if (fd < 0)
+ return COMMAND_ERROR_USAGE;
+
+ while (1) {
+ r = read(fd, mem_rw_buf, RW_BUF_SIZE);
+ if (r < 0) {
+ ret = -EIO;
+ goto out;
+ }
+ if (!r)
+ break;
+
+ v_idx = 0;
+
+ while (r) {
+ if (v[v_idx] == s[s_idx])
+ s_idx++;
+ else
+ s_idx = 0;
+
+ idx++;
+ v_idx++;
+
+ if (s_idx == strlen(s)) { /* found */
+ loff_t sz;
+ loff_t hit = idx - strlen(s);
+
+ if (lseek(fd, hit + offset, SEEK_SET) < 0) {
+ ret = -EIO;
+ goto out;
+ }
+
+ if (!len)
+ len = strlen(s);
+ sz = min_t(loff_t, len, RW_BUF_SIZE - 1);
+ r = read(fd, mem_rw_buf, sz);
+ if (r != sz) {
+ ret = -EIO;
+ goto out;
+ }
+
+ v[sz] = '\0';
+
+ if (t)
+ setenv(t, v);
+ else
+ printf("%s\n", v);
+
+ ret = 0;
+ goto out;
+ }
+ r--;
+ }
+ }
+out:
+ close(fd);
+ return ret;
+}
+
+BAREBOX_CMD_HELP_START(findstr)
+BAREBOX_CMD_HELP_USAGE("findstr [OPTIONS] <STRING> <FILE>\n")
+BAREBOX_CMD_HELP_SHORT("Find string in file and print it\n")
+BAREBOX_CMD_HELP_OPT("-o <offset>", "set offset of string which gets printed\n")
+BAREBOX_CMD_HELP_OPT("-l <length>", "set length of string which gets printed\n")
+BAREBOX_CMD_HELP_OPT("-t <var>", "print into variable instead of stdio\n")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(findstr)
+ .cmd = do_findstr,
+ .usage = "findstr [OPTIONS] <STRING> <FILE>",
+ BAREBOX_CMD_HELP(cmd_findstr_help)
+BAREBOX_CMD_END
--
1.7.10.4
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