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ls: add standards doc; record author of "total NNNN" code

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-10-03 10:53:36 +02:00
parent 76c7d9500a
commit 0683d4d633
1 changed files with 11 additions and 1 deletions
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12
coreutils/ls.c
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@ -584,6 +584,16 @@ static void showfiles(struct dnode **dn, unsigned nfiles)
#if ENABLE_DESKTOP #if ENABLE_DESKTOP
/* http://www.opengroup.org/onlinepubs/9699919799/utilities/ls.html
* If any of the -l, -n, -s options is specified, each list
* of files within the directory shall be preceded by a
* status line indicating the number of file system blocks
* occupied by files in the directory in 512-byte units if
* the -k option is not specified, or 1024-byte units if the
* -k option is specified, rounded up to the next integral
* number of units.
*/
/* by Jorgen Overgaard (jorgen AT antistaten.se) */
static off_t calculate_blocks(struct dnode **dn, int nfiles) static off_t calculate_blocks(struct dnode **dn, int nfiles)
{ {
uoff_t blocks = 1; uoff_t blocks = 1;
@ -593,7 +603,7 @@ static off_t calculate_blocks(struct dnode **dn, int nfiles)
nfiles--; nfiles--;
} }
/* Even though POSIX says use 512 byte blocks, coreutils use 1k */ /* Even though standard says use 512 byte blocks, coreutils use 1k */
/* Actually, we round up by calculating (blocks + 1) / 2, /* Actually, we round up by calculating (blocks + 1) / 2,
* "+ 1" was done when we initialized blocks to 1 */ * "+ 1" was done when we initialized blocks to 1 */
return blocks >> 1; return blocks >> 1;