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Merge pull request #20595 from Teufelchen1/fix/vfs_cmd

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shell/vfs: Handle print failure in genfile cmd gracefully
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Teufelchen 2024-04-25 13:46:16 +00:00 committed by GitHub
commit 5409364222
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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) static void _write_block(int fd, unsigned bs, unsigned i)
{ {
char block[bs]; 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'; block[bs - 1] = '\n';
vfs_write(fd, block, bs); vfs_write(fd, block, bs);