0000539: printf & leading zeroes - BusyBox Bug and Patch Tracking

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Category

Severity

Reproducibility

Date Submitted

Last Update

0000539

[uClibc] Stdio

minor

always

11-10-05 11:11

06-02-08 20:45

Reporter

dg6nee

View Status

public

Assigned To

mjn3

Priority

normal

Resolution

fixed

Status

closed

Product Version

0.9.28

Summary

0000539: printf & leading zeroes

Description

There is a bug when you use a compiler that packs structures/bitfields and allows entries with less than 32 bit. See include/printf.h, there is a bitfield that has only 12 bits. Our gcc packs this into a 16 bit unsigned short. On the other hand the same struct printf_info uses an unsigned int (32 bit!) for the same data -> this does of course not work.

I attached a patch that fixes this by adding the missing padding bits.

Additional Information

example for reproducing the error on a little endian machine / wchar mode:

wchar buffer[64];
double value = 123456800.0;
snwprintf(buffer, 64, "%+022.10lf"L, value);

result was : " 123456800.0000000000
expected : "00123456800.0000000000

Attached Files

uclibc-0.9.28_include_printf.h.diff [^] (506 bytes) 11-10-05 11:11

Relationships

Notes
(0008054) vda 06-02-08 20:45	Appears to be fixed already.

Issue History
Date Modified	Username	Field	Change
11-10-05 11:11	dg6nee	New Issue
11-10-05 11:11	dg6nee	Status	new => assigned
11-10-05 11:11	dg6nee	Assigned To	=> uClibc
11-10-05 11:11	dg6nee	File Added: uclibc-0.9.28_include_printf.h.diff
01-05-06 18:51	vapier	Assigned To	uClibc => mjn3
06-02-08 20:45	vda	Status	assigned => closed
06-02-08 20:45	vda	Note Added: 0008054
06-02-08 20:45	vda	Resolution	open => fixed