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unvram: get rid of some memory leaks

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SVN-Revision: 15430
This commit is contained in:
Jo-Philipp Wich 2009-04-27 01:38:15 +00:00
parent 0f3ccb8868
commit 1de0566a8b
3 changed files with 22 additions and 21 deletions
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2
package/unvram/Makefile
View file

@ -8,7 +8,7 @@
include $(TOPDIR)/rules.mk
PKG_NAME:=unvram
PKG_RELEASE:=2
PKG_RELEASE:=3
PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)

37
package/unvram/src/nvram.c
View file

@ -338,6 +338,7 @@ int nvram_commit(nvram_handle_t *h)
nvram_handle_t * nvram_open(const char *file, int rdonly)
{
int fd;
char *mtd = NULL;
nvram_handle_t *h;
nvram_header_t *header;
@ -345,16 +346,14 @@ nvram_handle_t * nvram_open(const char *file, int rdonly)
if( (nvram_erase_size == 0) || (file == NULL) )
{
/* Finding the mtd will set the appropriate erase size */
if( file == NULL )
file = nvram_find_mtd();
else
(void) nvram_find_mtd();
if( nvram_erase_size == 0 )
if( (mtd = nvram_find_mtd()) == NULL || nvram_erase_size == 0 )
{
free(mtd);
return NULL;
}
}
if( (fd = open(file, O_RDWR)) > -1 )
if( (fd = open(file ? file : mtd, O_RDWR)) > -1 )
{
char *mmap_area = (char *) mmap(
NULL, nvram_erase_size, PROT_READ | PROT_WRITE,
@ -377,6 +376,7 @@ nvram_handle_t * nvram_open(const char *file, int rdonly)
if( header->magic == NVRAM_MAGIC )
{
_nvram_rehash(h);
free(mtd);
return h;
}
else
@ -388,6 +388,7 @@ nvram_handle_t * nvram_open(const char *file, int rdonly)
}
}
free(mtd);
return NULL;
}
@ -403,7 +404,7 @@ int nvram_close(nvram_handle_t *h)
}
/* Determine NVRAM device node. */
const char * nvram_find_mtd(void)
char * nvram_find_mtd(void)
{
FILE *fp;
int i, esz;
@ -411,13 +412,11 @@ const char * nvram_find_mtd(void)
char *path = NULL;
struct stat s;
// "/dev/mtdblock/" + ( 0 < x < 99 ) + \0 = 19
if( (path = (char *) malloc(19)) == NULL )
return NULL;
if ((fp = fopen("/proc/mtd", "r"))) {
while (fgets(dev, sizeof(dev), fp)) {
if (strstr(dev, "nvram") && sscanf(dev, "mtd%d: %08x", &i, &esz))
if( (fp = fopen("/proc/mtd", "r")) )
{
while( fgets(dev, sizeof(dev), fp) )
{
if( strstr(dev, "nvram") && sscanf(dev, "mtd%d: %08x", &i, &esz) )
{
nvram_erase_size = esz;
@ -451,7 +450,7 @@ const char * nvram_find_mtd(void)
}
/* Check NVRAM staging file. */
const char * nvram_find_staging(void)
char * nvram_find_staging(void)
{
struct stat s;
@ -467,7 +466,7 @@ const char * nvram_find_staging(void)
int nvram_to_staging(void)
{
int fdmtd, fdstg, stat;
const char *mtd = nvram_find_mtd();
char *mtd = nvram_find_mtd();
char buf[nvram_erase_size];
stat = -1;
@ -492,6 +491,7 @@ int nvram_to_staging(void)
}
}
free(mtd);
return stat;
}
@ -499,7 +499,7 @@ int nvram_to_staging(void)
int staging_to_nvram(void)
{
int fdmtd, fdstg, stat;
const char *mtd = nvram_find_mtd();
char *mtd = nvram_find_mtd();
char buf[nvram_erase_size];
stat = -1;
@ -526,5 +526,6 @@ int staging_to_nvram(void)
}
}
free(mtd);
return stat;
}

4
package/unvram/src/nvram.h
View file

@ -90,7 +90,7 @@ uint8_t hndcrc8 (uint8_t * pdata, uint32_t nbytes, uint8_t crc);
uint8_t nvram_calc_crc(nvram_header_t * nvh);
/* Determine NVRAM device node. */
const char * nvram_find_mtd(void);
char * nvram_find_mtd(void);
/* Copy NVRAM contents to staging file. */
int nvram_to_staging(void);
@ -99,7 +99,7 @@ int nvram_to_staging(void);
int staging_to_nvram(void);
/* Check NVRAM staging file. */
const char * nvram_find_staging(void);
char * nvram_find_staging(void);
/* Staging file for NVRAM */