svn commit: r364107 - stable/12/usr.bin/xinstall
Eugene Grosbein
eugen at FreeBSD.org
Tue Aug 11 11:32:44 UTC 2020
Author: eugen
Date: Tue Aug 11 11:32:44 2020
New Revision: 364107
URL: https://svnweb.freebsd.org/changeset/base/364107
Log:
MFC r363064,363067,363081,363136: optimize install(1) a bit.
Currently, "install -s -S" behaviour is inefficient for upgrade.
First it finds that destination file already exists and copies
source file to temporary file. Then it calls strip(1)
with name of temporary file as single agrument and our strip(1) creates
another temporary file in the /tmp (or TMPDIR) making another copy
that is finally copied to DESTDIR third time.
Meantime, strip(1) has an option "-o dst" to specify destination
so install(1) is allowed to skip initial copying from obj to DESTDIR.
This change makes it do so.
This optimization descreases total amount of data sent to
both of /tmp and DESTDIR during "make installworld" by 32% or so.
See the differential for details.
Differential Revision: https://reviews.freebsd.org/D25551
Modified:
stable/12/usr.bin/xinstall/xinstall.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/usr.bin/xinstall/xinstall.c
==============================================================================
--- stable/12/usr.bin/xinstall/xinstall.c Tue Aug 11 10:56:44 2020 (r364106)
+++ stable/12/usr.bin/xinstall/xinstall.c Tue Aug 11 11:32:44 2020 (r364107)
@@ -136,7 +136,7 @@ static void install_dir(char *);
static void metadata_log(const char *, const char *, struct timespec *,
const char *, const char *, off_t);
static int parseid(const char *, id_t *);
-static void strip(const char *);
+static int strip(const char *, int, const char *, char **);
static int trymmap(int);
static void usage(void);
@@ -756,12 +756,13 @@ install(const char *from_name, const char *to_name, u_
{
struct stat from_sb, temp_sb, to_sb;
struct timespec tsb[2];
- int devnull, files_match, from_fd, serrno, target;
+ int devnull, files_match, from_fd, serrno, stripped, target;
int tempcopy, temp_fd, to_fd;
char backup[MAXPATHLEN], *p, pathbuf[MAXPATHLEN], tempfile[MAXPATHLEN];
char *digestresult;
- files_match = 0;
+ digestresult = NULL;
+ files_match = stripped = 0;
from_fd = -1;
to_fd = -1;
@@ -847,19 +848,24 @@ install(const char *from_name, const char *to_name, u_
(void)printf("install: %s -> %s\n",
from_name, to_name);
}
- if (!devnull)
- digestresult = copy(from_fd, from_name, to_fd,
- tempcopy ? tempfile : to_name, from_sb.st_size);
- else
- digestresult = NULL;
+ if (!devnull) {
+ if (dostrip)
+ stripped = strip(tempcopy ? tempfile : to_name,
+ to_fd, from_name, &digestresult);
+ if (!stripped)
+ digestresult = copy(from_fd, from_name, to_fd,
+ tempcopy ? tempfile : to_name, from_sb.st_size);
+ }
}
if (dostrip) {
- strip(tempcopy ? tempfile : to_name);
+ if (!stripped)
+ (void)strip(tempcopy ? tempfile : to_name, to_fd,
+ NULL, &digestresult);
/*
- * Re-open our fd on the target, in case we used a strip
- * that does not work in-place -- like GNU binutils strip.
+ * Re-open our fd on the target, in case
+ * we did not strip in-place.
*/
close(to_fd);
to_fd = open(tempcopy ? tempfile : to_name, O_RDONLY, 0);
@@ -1046,7 +1052,9 @@ install(const char *from_name, const char *to_name, u_
/*
* compare --
- * compare two files; non-zero means files differ
+ * Compare two files; non-zero means files differ.
+ * Compute digest and return its address in *dresp
+ * unless it points to pre-computed digest.
*/
static int
compare(int from_fd, const char *from_name __unused, size_t from_len,
@@ -1055,15 +1063,17 @@ compare(int from_fd, const char *from_name __unused, s
{
char *p, *q;
int rv;
- int done_compare;
+ int do_digest, done_compare;
DIGEST_CTX ctx;
rv = 0;
if (from_len != to_len)
return 1;
+ do_digest = (digesttype != DIGEST_NONE && dresp != NULL &&
+ *dresp == NULL);
if (from_len <= MAX_CMP_SIZE) {
- if (dresp != NULL)
+ if (do_digest)
digest_init(&ctx);
done_compare = 0;
if (trymmap(from_fd) && trymmap(to_fd)) {
@@ -1079,7 +1089,7 @@ compare(int from_fd, const char *from_name __unused, s
}
rv = memcmp(p, q, from_len);
- if (dresp != NULL)
+ if (do_digest)
digest_update(&ctx, p, from_len);
munmap(p, from_len);
munmap(q, from_len);
@@ -1106,7 +1116,8 @@ compare(int from_fd, const char *from_name __unused, s
rv = 1; /* out of sync */
} else
rv = 1; /* read failure */
- digest_update(&ctx, buf1, n1);
+ if (do_digest)
+ digest_update(&ctx, buf1, n1);
}
lseek(from_fd, 0, SEEK_SET);
lseek(to_fd, 0, SEEK_SET);
@@ -1114,7 +1125,7 @@ compare(int from_fd, const char *from_name __unused, s
} else
rv = 1; /* don't bother in this case */
- if (dresp != NULL) {
+ if (do_digest) {
if (rv == 0)
*dresp = digest_end(&ctx, NULL);
else
@@ -1287,22 +1298,34 @@ copy(int from_fd, const char *from_name, int to_fd, co
/*
* strip --
- * use strip(1) to strip the target file
+ * Use strip(1) to strip the target file.
+ * Just invoke strip(1) on to_name if from_name is NULL, else try
+ * to run "strip -o to_name -- from_name" and return 0 on failure.
+ * Return 1 on success and assign result of digest_file(to_name)
+ * to *dresp.
*/
-static void
-strip(const char *to_name)
+static int
+strip(const char *to_name, int to_fd, const char *from_name, char **dresp)
{
const char *stripbin;
- const char *args[3];
+ const char *args[6];
pid_t pid;
- int error, status;
+ int error, serrno, status;
stripbin = getenv("STRIPBIN");
if (stripbin == NULL)
stripbin = "strip";
args[0] = stripbin;
- args[1] = to_name;
- args[2] = NULL;
+ if (from_name == NULL) {
+ args[1] = to_name;
+ args[2] = NULL;
+ } else {
+ args[1] = "-o";
+ args[2] = to_name;
+ args[3] = "--";
+ args[4] = from_name;
+ args[5] = NULL;
+ }
error = posix_spawnp(&pid, stripbin, NULL, NULL,
__DECONST(char **, args), environ);
if (error != 0) {
@@ -1317,10 +1340,21 @@ strip(const char *to_name)
/* NOTREACHED */
}
if (status != 0) {
+ if (from_name != NULL)
+ return (0);
(void)unlink(to_name);
errx(EX_SOFTWARE, "strip command %s failed on %s",
stripbin, to_name);
}
+ if (from_name != NULL && safecopy && fsync(to_fd) == -1) {
+ serrno = errno;
+ (void)unlink(to_name);
+ errno = serrno;
+ err(EX_OSERR, "fsync failed for %s", to_name);
+ }
+ if (dresp != NULL)
+ *dresp = digest_file(to_name);
+ return (1);
}
/*
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