JianyuWang0623 opened a new pull request, #16598:
URL: https://github.com/apache/nuttx/pull/16598
## Summary
Fix output format of fd info. Refered to PRINTF(3), the [v]snprintf returns
the number of characters printed (excluding the null byte used to end output to
strings).
> Upon successful return, these functions return the number of characters
printed (excluding the null byte used to end output to strings). -- PRINTF(3)
## Impact
- fs/procfs
## Testing
- Currently
1. Extra blank at line start, e.g. fd num 1 and below
2. Truncated print, see fd num 3, missing end bracked "]"
```
nsh> fdinfo 9
FD OFLAGS TYPE POS PATH
0 3 1 0 /dev/console
1 3 1 0 /dev/console
2 3 1 0 /dev/console
3 3 9 0 tcp:[0.0.0.0:5554<->0.0.0.0:0, st 01, flg 31
4 1089 1 0 /dev/fastboot/ep
5 1090 1 0 /dev/fastboot/ep
6 0 1 0
nsh>
nsh>
```
- With this patch
```
nsh> fdinfo 9
FD OFLAGS TYPE POS PATH BACKTRACE
0 3 1 0 /dev/console
1 3 1 0 /dev/console
2 3 1 0 /dev/console
3 3 9 0 tcp:[0.0.0.0:5554<->0.0.0.0:0, st 01, flg 31]
4 1089 1 0 /dev/fastboot/ep2
5 1090 1 0 /dev/fastboot/ep1
6 0 1 0
nsh>
```
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