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author | Sascha Hauer <s.hauer@pengutronix.de> | 2019-05-23 16:00:43 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2019-05-23 16:00:49 +0200 |
commit | 300ad58d334d1aaa27c9cf02f0d7792a14dc1828 (patch) | |
tree | c6639830d8d6ad35f313d493bc147389d8fd5ac2 /commands/mw.c | |
parent | a66e38747cb5237a48f323dcef20b99d8ca8a530 (diff) | |
download | barebox-300ad58d334d1aaa27c9cf02f0d7792a14dc1828.tar.gz barebox-300ad58d334d1aaa27c9cf02f0d7792a14dc1828.tar.xz |
commands: mw: Use kstrto*() instead of simple_strtoul()
Now that we have the kstrto*() functions we can use them to detect
various errors in passing numbers on the command line. Start with
the 'mw' command and make it more robust against illegal numbers.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'commands/mw.c')
-rw-r--r-- | commands/mw.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/commands/mw.c b/commands/mw.c index 2912997a31..3ed6c820d0 100644 --- a/commands/mw.c +++ b/commands/mw.c @@ -63,23 +63,31 @@ static int do_mem_mw(int argc, char *argv[]) u64 val64; switch (mode) { case O_RWSIZE_1: - val8 = simple_strtoul(argv[optind], NULL, 0); + ret = kstrtou8(argv[optind], 0, &val8); + if (ret) + goto illegal_number; ret = write(fd, &val8, 1); break; case O_RWSIZE_2: - val16 = simple_strtoul(argv[optind], NULL, 0); + ret = kstrtou16(argv[optind], 0, &val16); + if (ret) + goto illegal_number; if (swab) val16 = __swab16(val16); ret = write(fd, &val16, 2); break; case O_RWSIZE_4: - val32 = simple_strtoul(argv[optind], NULL, 0); + ret = kstrtou32(argv[optind], 0, &val32); + if (ret) + goto illegal_number; if (swab) val32 = __swab32(val32); ret = write(fd, &val32, 4); break; case O_RWSIZE_8: - val64 = simple_strtoull(argv[optind], NULL, 0); + ret = kstrtou64(argv[optind], 0, &val64); + if (ret) + goto illegal_number; if (swab) val64 = __swab64(val64); ret = write(fd, &val64, 8); @@ -96,6 +104,14 @@ static int do_mem_mw(int argc, char *argv[]) close(fd); return ret ? 1 : 0; + +illegal_number: + printf("\"%s\" is not a valid %d bit number\n", argv[optind], + (mode >> O_RWSIZE_SHIFT) * 8); + + close(fd); + + return 1; } BAREBOX_CMD_HELP_START(mw) |