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Allow writing to currently executing files

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This commit is contained in:
Michal Moskal 2017-07-27 20:42:28 +01:00
parent abdb21f2a0
commit de0b5f0d86
1 changed files with 5 additions and 0 deletions
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5
brick/uf2daemon/fat.c
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@ -21,6 +21,7 @@
#include <sys/wait.h> #include <sys/wait.h>
#include <sys/ioctl.h> #include <sys/ioctl.h>
#include <string.h> #include <string.h>
#include <errno.h>
#define max(a, b) \ #define max(a, b) \
({ \ ({ \
@ -740,6 +741,10 @@ void write_block(uint32_t block_no, uint8_t *data) {
*p = '/'; *p = '/';
int fd = open(fn, O_WRONLY | O_CREAT, 0777); int fd = open(fn, O_WRONLY | O_CREAT, 0777);
if (fd < 0 && errno == ETXTBSY) {
unlink(fn);
fd = open(fn, O_WRONLY | O_CREAT, 0777);
}
if (fd >= 0) { if (fd >= 0) {
ftruncate(fd, bl->fileSize); ftruncate(fd, bl->fileSize);
lseek(fd, bl->targetAddr, SEEK_SET); lseek(fd, bl->targetAddr, SEEK_SET);