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new command for displaying strings at specified memory locations

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Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2008-02-04 19:26:57 -05:00
parent b58d8b48e2
commit 30942b18b6
2 changed files with 50 additions and 0 deletions
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1
common/Makefile
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@ -87,6 +87,7 @@ COBJS-$(CONFIG_CMD_REISER) += cmd_reiser.o
COBJS-y += cmd_sata.o
COBJS-$(CONFIG_CMD_SCSI) += cmd_scsi.o
COBJS-$(CONFIG_CMD_SPI) += cmd_spi.o
COBJS-$(CONFIG_CMD_STRINGS) += cmd_strings.o
COBJS-$(CONFIG_CMD_TERMINAL) += cmd_terminal.o
COBJS-$(CONFIG_CMD_UNIVERSE) += cmd_universe.o
COBJS-$(CONFIG_CMD_USB) += cmd_usb.o

49
common/cmd_strings.c Normal file
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@ -0,0 +1,49 @@
/*
* cmd_strings.c - just like `strings` command
*
* Copyright (c) 2008 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#include <config.h>
#include <common.h>
#include <command.h>
#ifdef CONFIG_CFG_STRINGS
static char *start_addr, *last_addr;
int do_strings(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
if (argc == 1) {
printf("Usage:\n%s\n", cmdtp->usage);
return 1;
}
if ((flag & CMD_FLAG_REPEAT) == 0) {
start_addr = (char *)simple_strtoul(argv[1], NULL, 16);
if (argc > 2)
last_addr = (char *)simple_strtoul(argv[2], NULL, 16);
else
last_addr = (char *)-1;
}
char *addr = start_addr;
do {
printf("%s\n", addr);
addr += strlen(addr) + 1;
} while (addr[0] && addr < last_addr);
last_addr = addr + (last_addr - start_addr);
start_addr = addr;
return 0;
}
U_BOOT_CMD(strings, 3, 1, do_strings,
"strings - display strings\n",
"<addr> [byte count]\n"
" - display strings at <addr> for at least [byte count] or first double NUL\n");
#endif