[PATCH] xfs_quota: Warn if specified non-zero quota will be round down to zero.

[Arkadiusz Miskiewicz]

User specified quota limit is internally converted to "basic blocks"
unit (512 bytes in size). Quota value will be silently converted
to zero when user enters any value lower than 512 bytes.

Warn in such case:

: # ./xfs_quota -x -c "limit -u bsoft=431 12000" /home
: xfs_quota: Warning: `431' in quota blocks is 0 (unlimited).
---
 xfsprogs/po/pl.po     |    5 +++++
 xfsprogs/quota/edit.c |    2 ++
 2 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/xfsprogs/po/pl.po b/xfsprogs/po/pl.po
index b4e1d76..d13184b 100644
--- a/xfsprogs/po/pl.po
+++ b/xfsprogs/po/pl.po
@@ -3670,6 +3670,11 @@ msgstr "%s: nieprawid
 msgid "%s: invalid project name: %s\n"
 msgstr "%s: nieprawid³owa nazwa projektu: %s\n"
 
+#: ../quota/edit.c:237
+#, c-format
+msgid "%s: Warning: `%s' in quota blocks is 0 (unlimited).\n"
+msgstr "%s: Uwaga: `%s' w blokach quoty oznacza 0 (nieograniczone).\n"
+
 #: ../quota/edit.c:318
 #, c-format
 msgid "%s: unrecognised argument %s\n"
diff --git a/xfsprogs/quota/edit.c b/xfsprogs/quota/edit.c
index 15c72c4..ce7f7e9 100644
--- a/xfsprogs/quota/edit.c
+++ b/xfsprogs/quota/edit.c
@@ -233,6 +233,8 @@ extractb(
 		s = string + length + 1;
 		v = (__uint64_t)cvtnum(blocksize, sectorsize, s);
 		*value = v >> 9;	/* syscalls use basic blocks */
+		if (v > 0 && *value == 0)
+			fprintf(stderr, _("%s: Warning: `%s' in quota blocks is 0 (unlimited).\n"), progname, s);
 		return 1;
 	}
 	return 0;
-- 
1.6.0.5