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fw_env.c: Switch get_config to use '%ms' in sscanf 

We currently limit ourself to 16 characters for the device name to read
the environment from.  This is insufficient for /dev/mmcblk0boot1 to
work for example.  Switch to '%ms' which gives us a dynamically
allocated buffer instead.  We're short lived enough to not bother
free()ing the buffer.

Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Tom Rini 2014-03-28 12:03:33 -04:00
parent 548a64d845
commit 229695fee9
1 changed files with 8 additions and 5 deletions
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13
tools/env/fw_env.c vendored
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@ -40,7 +40,7 @@
_min1 < _min2 ? _min1 : _min2; })
struct envdev_s {
char devname[16]; /* Device name */
const char *devname; /* Device name */
ulong devoff; /* Device offset */
ulong env_size; /* environment size */
ulong erase_size; /* device erase size */
@ -1243,7 +1243,7 @@ static int parse_config ()
return -1;
}
#else
strcpy (DEVNAME (0), DEVICE1_NAME);
DEVNAME (0) = DEVICE1_NAME;
DEVOFFSET (0) = DEVICE1_OFFSET;
ENVSIZE (0) = ENV1_SIZE;
/* Default values are: erase-size=env-size */
@ -1258,7 +1258,7 @@ static int parse_config ()
#endif
#ifdef HAVE_REDUND
strcpy (DEVNAME (1), DEVICE2_NAME);
DEVNAME (1) = DEVICE2_NAME;
DEVOFFSET (1) = DEVICE2_OFFSET;
ENVSIZE (1) = ENV2_SIZE;
/* Default values are: erase-size=env-size */
@ -1297,6 +1297,7 @@ static int get_config (char *fname)
int i = 0;
int rc;
char dump[128];
char *devname;
fp = fopen (fname, "r");
if (fp == NULL)
@ -1307,8 +1308,8 @@ static int get_config (char *fname)
if (dump[0] == '#')
continue;
rc = sscanf (dump, "%s %lx %lx %lx %lx",
DEVNAME (i),
rc = sscanf (dump, "%ms %lx %lx %lx %lx",
&devname,
&DEVOFFSET (i),
&ENVSIZE (i),
&DEVESIZE (i),
@ -1317,6 +1318,8 @@ static int get_config (char *fname)
if (rc < 3)
continue;
DEVNAME(i) = devname;
if (rc < 4)
/* Assume the erase size is the same as the env-size */
DEVESIZE(i) = ENVSIZE(i);