Bug 32497
| Summary: | sprintf printf error zero padding | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | Clemens Wehrmann <cwehrmann> |
| Component: | man-pages | Assignee: | Trond Eivind Glomsrxd <teg> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Brian Brock <bbrock> |
| Severity: | low | Docs Contact: | |
| Priority: | medium | ||
| Version: | 6.2 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2001-03-21 01:56:41 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
A newer man page (from Red Hat Linux 7) tells:
0 The value should be zero padded. For d, i, o, u,
x, X, a, A, e, E, f, F, g, and G conversions, the
converted value is padded on the left with zeros
rather than blanks. If the 0 and - flags both
appear, the 0 flag is ignored. If a precision is
given with a numeric conversion (d, i, o, u, x, and
X), the 0 flag is ignored. For other conversions,
the behavior is undefined.
|
From Bugzilla Helper: User-Agent: Mozilla/4.76 [en] (X11; U; Linux 2.2.18 i686) [s]printf man page claims '0' flag pads with zeros for (almost) all conversions. In fact it only does so for numeric conversions. I quote from "man sprintf": 0 specifying zero padding. For all conver- sions except n, the converted value is padded on the left with zeros rather than blanks. If a precision is given with a numeric conversion (d, i, o, u, i, x, and X), the 0 flag is ignored. Basically, neither "c" nor "s" obey the "pad with zeros" flag, nor, according to most people, should they, but the man page implies that they should. Reproducible: Always Steps to Reproduce: $ more junk.c #include <stdio.h> int main() { printf("%06c\n", 'A'); return (0); } Actual Results: $ make junk cc junk.c -o junk $ ./junk A Expected Results: Man page suggests (in error) that this should have returned $ ./junk 00000A