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shell/vfs: Handle print failure in genfile cmd gracefully

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This commit is contained in:
Teufelchen1 2024-04-18 17:02:31 +02:00
parent 3c3c5c281c
commit 8bd1de8259
1 changed files with 11 additions and 3 deletions
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14
sys/shell/cmds/vfs.c
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@ -742,11 +742,19 @@ static char _get_char(unsigned i)
static void _write_block(int fd, unsigned bs, unsigned i)
{
char block[bs];
char *buf = block;
buf += snprintf(buf, bs, "|%03u|", i);
int size_wanted = snprintf(block, bs, "|%03u|", i);
if (size_wanted < 0) {
assert(0);
return;
}
/* Only memset the buffer, if there is space left in the buffer */
if ((unsigned) size_wanted < bs) {
memset(&block[size_wanted], _get_char(i), bs - size_wanted);
}
memset(buf, _get_char(i), &block[bs] - buf);
block[bs - 1] = '\n';
vfs_write(fd, block, bs);