d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Simplify and optimize. This speeds up 'initattr' enormously for small

Browse Source 
attribute sizes (up to two orders of magnitude!)
This commit is contained in:
Dag-Erling Smørgrav 2002-04-06 05:02:54 +00:00
parent 5e022fc6f0
commit 65528d1782
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=93928
1 changed files with 29 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

70
usr.sbin/extattrctl/extattrctl.c
View File

@ -83,26 +83,26 @@ num_inodes_by_path(char *path)
return (buf.f_files);
}
static const char zero_buf[8192];
int
initattr(int argc, char *argv[])
{
struct ufs_extattr_fileheader uef;
char *fs_path = NULL;
char *zero_buf = NULL;
long loop, num_inodes;
int ch, i, error, chunksize, overwrite = 0, flags;
int ch, i, error, flags;
ssize_t wlen;
size_t easize;
flags = O_CREAT | O_WRONLY | O_TRUNC | O_EXCL;
optind = 0;
while ((ch = getopt(argc, argv, "fp:r:w:")) != -1)
switch (ch) {
case 'f':
overwrite = 1;
flags &= ~O_EXCL;
break;
case 'p':
if ((fs_path = strdup(optarg)) == NULL) {
perror("strdup");
return(-1);
}
fs_path = optarg;
break;
case '?':
default:
@ -115,44 +115,32 @@ initattr(int argc, char *argv[])
if (argc != 2)
usage();
if (overwrite)
flags = O_CREAT | O_WRONLY;
else
flags = O_CREAT | O_EXCL | O_WRONLY;
error = 0;
if ((i = open(argv[1], flags, 0600)) != -1) {
uef.uef_magic = UFS_EXTATTR_MAGIC;
uef.uef_version = UFS_EXTATTR_VERSION;
uef.uef_size = atoi(argv[0]);
if (write(i, &uef, sizeof(uef)) == -1)
error = -1;
else if (fs_path) {
chunksize = sizeof(struct ufs_extattr_header) +
uef.uef_size;
zero_buf = (char *) (malloc(chunksize));
if (zero_buf == NULL) {
perror("malloc");
unlink(argv[1]);
return (-1);
}
memset(zero_buf, 0, chunksize);
num_inodes = num_inodes_by_path(fs_path);
for (loop = 0; loop < num_inodes; loop++) {
error = write(i, zero_buf, chunksize);
if (error != chunksize) {
perror("write");
unlink(argv[1]);
return (-1);
}
}
}
}
if (i == -1) {
if ((i = open(argv[1], flags, 0600)) == -1) {
/* unable to open file */
perror(argv[1]);
return (-1);
}
uef.uef_magic = UFS_EXTATTR_MAGIC;
uef.uef_version = UFS_EXTATTR_VERSION;
uef.uef_size = atoi(argv[0]);
if (write(i, &uef, sizeof(uef)) == -1)
error = -1;
else if (fs_path != NULL) {
easize = (sizeof uef + uef.uef_size) *
num_inodes_by_path(fs_path);
while (easize > 0) {
if (easize > sizeof zero_buf)
wlen = write(i, zero_buf, sizeof zero_buf);
else
wlen = write(i, zero_buf, easize);
if (wlen == -1) {
error = -1;
break;
}
easize -= wlen;
}
}
if (error == -1) {
perror(argv[1]);
unlink(argv[1]);