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Tue, 14 Feb 2017 10:26:18 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 20/24] qemu-img: Wrap cvtnum() around qemu_strtosz() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , qemu-block@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Cc: Kevin Wolf Cc: Max Reitz Cc: qemu-block@nongnu.org Signed-off-by: Markus Armbruster Reviewed-by: Eric Blake --- qemu-img.c | 58 +++++++++++++++++++++++++++++++--------------------------- 1 file changed, 31 insertions(+), 27 deletions(-) diff --git a/qemu-img.c b/qemu-img.c index 4407244..2a47966 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -368,6 +368,19 @@ static int add_old_style_options(const char *fmt, Qemu= Opts *opts, return 0; } =20 +static int64_t cvtnum(const char *s) +{ + char *end; + int64_t ret; + + ret =3D qemu_strtosz(s, &end); + if (*end !=3D '\0') { + /* Detritus at the end of the string */ + return -EINVAL; + } + return ret; +} + static int img_create(int argc, char **argv) { int c; @@ -461,9 +474,9 @@ static int img_create(int argc, char **argv) /* Get image size, if specified */ if (optind < argc) { int64_t sval; - char *end; - sval =3D qemu_strtosz(argv[optind++], &end); - if (sval < 0 || *end) { + + sval =3D cvtnum(argv[optind++]); + if (sval < 0) { if (sval =3D=3D -ERANGE) { error_report("Image size must be less than 8 EiB!"); } else { @@ -1861,9 +1874,9 @@ static int img_convert(int argc, char **argv) case 'S': { int64_t sval; - char *end; - sval =3D qemu_strtosz(optarg, &end); - if (sval < 0 || *end) { + + sval =3D cvtnum(optarg); + if (sval < 0) { error_report("Invalid minimum zero buffer size for sparse = output specified"); ret =3D -1; goto fail_getopt; @@ -3648,10 +3661,8 @@ static int img_bench(int argc, char **argv) break; case 'o': { - char *end; - errno =3D 0; - offset =3D qemu_strtosz(optarg, &end); - if (offset < 0|| *end) { + offset =3D cvtnum(optarg); + if (offset < 0) { error_report("Invalid offset specified"); return 1; } @@ -3664,10 +3675,9 @@ static int img_bench(int argc, char **argv) case 's': { int64_t sval; - char *end; =20 - sval =3D qemu_strtosz(optarg, &end); - if (sval < 0 || sval > INT_MAX || *end) { + sval =3D cvtnum(optarg); + if (sval < 0 || sval > INT_MAX) { error_report("Invalid buffer size specified"); return 1; } @@ -3678,10 +3688,9 @@ static int img_bench(int argc, char **argv) case 'S': { int64_t sval; - char *end; =20 - sval =3D qemu_strtosz(optarg, &end); - if (sval < 0 || sval > INT_MAX || *end) { + sval =3D cvtnum(optarg); + if (sval < 0 || sval > INT_MAX) { error_report("Invalid step size specified"); return 1; } @@ -3840,12 +3849,11 @@ static int img_dd_bs(const char *arg, struct DdIo *in, struct DdIo *out, struct DdInfo *dd) { - char *end; int64_t res; =20 - res =3D qemu_strtosz(arg, &end); + res =3D cvtnum(arg); =20 - if (res <=3D 0 || res > INT_MAX || *end) { + if (res <=3D 0 || res > INT_MAX) { error_report("invalid number: '%s'", arg); return 1; } @@ -3858,11 +3866,9 @@ static int img_dd_count(const char *arg, struct DdIo *in, struct DdIo *out, struct DdInfo *dd) { - char *end; + dd->count =3D cvtnum(arg); =20 - dd->count =3D qemu_strtosz(arg, &end); - - if (dd->count < 0 || *end) { + if (dd->count < 0) { error_report("invalid number: '%s'", arg); return 1; } @@ -3892,11 +3898,9 @@ static int img_dd_skip(const char *arg, struct DdIo *in, struct DdIo *out, struct DdInfo *dd) { - char *end; + in->offset =3D cvtnum(arg); =20 - in->offset =3D qemu_strtosz(arg, &end); - - if (in->offset < 0 || *end) { + if (in->offset < 0) { error_report("invalid number: '%s'", arg); return 1; } --=20 2.7.4