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authorDan McGee <dan@archlinux.org>2008-06-15 19:15:36 -0500
committerDan McGee <dan@archlinux.org>2008-06-15 22:52:27 -0500
commit29bf6814f74096e5d8ea22058e638eb362717b8a (patch)
tree1b608ba8071c1c7e52808a4b178ba8225ef6d2b1 /lib
parent7ff5a917fd0a91cd03ba61419a57053e4ae17e92 (diff)
Use access() instead of stat() when possible
We were using the stat() system call in quite a few places when we didn't actually need anything the stat struct returned- we were simply checking for file existence. access() will be more efficient in those cases. Before (strace pacman -Ss pacman): % time seconds usecs/call calls errors syscall ------ ----------- ----------- --------- --------- ---------------- 33.16 0.005987 0 19016 stat64 After: % time seconds usecs/call calls errors syscall ------ ----------- ----------- --------- --------- ---------------- 34.85 0.003863 0 12633 1 access 7.95 0.000881 0 6391 7 stat64 Signed-off-by: Dan McGee <dan@archlinux.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/libalpm/be_files.c5
-rw-r--r--lib/libalpm/trans.c8
-rw-r--r--lib/libalpm/util.c12
3 files changed, 10 insertions, 15 deletions
diff --git a/lib/libalpm/be_files.c b/lib/libalpm/be_files.c
index 12c60b24..f5d4e826 100644
--- a/lib/libalpm/be_files.c
+++ b/lib/libalpm/be_files.c
@@ -355,7 +355,6 @@ static char *get_pkgpath(pmdb_t *db, pmpkg_t *info)
int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
{
FILE *fp = NULL;
- struct stat buf;
char path[PATH_MAX];
char line[513];
char *pkgpath = NULL;
@@ -393,7 +392,7 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
pkgpath = get_pkgpath(db, info);
- if(stat(pkgpath, &buf)) {
+ if(access(pkgpath, F_OK)) {
/* directory doesn't exist or can't be opened */
_alpm_log(PM_LOG_DEBUG, "cannot find '%s-%s' in db '%s'\n",
info->name, info->version, db->treename);
@@ -631,7 +630,7 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
/* INSTALL */
if(inforeq & INFRQ_SCRIPTLET) {
snprintf(path, PATH_MAX, "%sinstall", pkgpath);
- if(!stat(path, &buf)) {
+ if(access(path, F_OK) == 0) {
info->scriptlet = 1;
}
}
diff --git a/lib/libalpm/trans.c b/lib/libalpm/trans.c
index eb53e952..06084ae9 100644
--- a/lib/libalpm/trans.c
+++ b/lib/libalpm/trans.c
@@ -25,6 +25,7 @@
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
+#include <unistd.h>
#include <sys/wait.h>
#include <sys/types.h>
#include <sys/stat.h>
@@ -451,7 +452,6 @@ int _alpm_runscriptlet(const char *root, const char *installfn,
char tmpdir[PATH_MAX];
char cwd[PATH_MAX];
char *scriptpath;
- struct stat buf;
pid_t pid;
int clean_tmpdir = 0;
int restore_cwd = 0;
@@ -459,14 +459,14 @@ int _alpm_runscriptlet(const char *root, const char *installfn,
ALPM_LOG_FUNC;
- if(stat(installfn, &buf)) {
+ if(access(installfn, R_OK)) {
/* not found */
_alpm_log(PM_LOG_DEBUG, "scriptlet '%s' not found\n", installfn);
return(0);
}
/* NOTE: popen will use the PARENT's /bin/sh, not the chroot's */
- if(stat("/bin/sh", &buf)) {
+ if(access("/bin/sh", X_OK)) {
/* not found */
_alpm_log(PM_LOG_ERROR, _("No /bin/sh in parent environment, aborting scriptlet\n"));
return(0);
@@ -474,7 +474,7 @@ int _alpm_runscriptlet(const char *root, const char *installfn,
/* creates a directory in $root/tmp/ for copying/extracting the scriptlet */
snprintf(tmpdir, PATH_MAX, "%stmp/", root);
- if(stat(tmpdir, &buf)) {
+ if(access(tmpdir, F_OK) != 0) {
_alpm_makepath_mode(tmpdir, 01777);
}
snprintf(tmpdir, PATH_MAX, "%stmp/alpm_XXXXXX", root);
diff --git a/lib/libalpm/util.c b/lib/libalpm/util.c
index 55bd46a8..91995451 100644
--- a/lib/libalpm/util.c
+++ b/lib/libalpm/util.c
@@ -200,12 +200,11 @@ int _alpm_makepath_mode(const char *path, mode_t mode)
str = orig;
while((ptr = strsep(&str, "/"))) {
if(strlen(ptr)) {
- struct stat buf;
/* we have another path component- append the newest component to
* existing string and create one more level of dir structure */
strcat(incr, "/");
strcat(incr, ptr);
- if(stat(incr, &buf)) {
+ if(access(incr, F_OK)) {
if(mkdir(incr, mode)) {
ret = 1;
break;
@@ -533,12 +532,11 @@ int _alpm_logaction(unsigned short usesyslog, FILE *f, const char *fmt, va_list
int _alpm_ldconfig(const char *root)
{
char line[PATH_MAX];
- struct stat buf;
snprintf(line, PATH_MAX, "%setc/ld.so.conf", root);
- if(stat(line, &buf) == 0) {
+ if(access(line, F_OK) == 0) {
snprintf(line, PATH_MAX, "%ssbin/ldconfig", root);
- if(stat(line, &buf) == 0) {
+ if(access(line, X_OK) == 0) {
char cmd[PATH_MAX];
snprintf(cmd, PATH_MAX, "%s -r %s", line, root);
system(cmd);
@@ -561,7 +559,6 @@ int _alpm_str_cmp(const void *s1, const void *s2)
*/
char *_alpm_filecache_find(const char* filename)
{
- struct stat buf;
char path[PATH_MAX];
char *retpath;
alpm_list_t *i;
@@ -570,8 +567,7 @@ char *_alpm_filecache_find(const char* filename)
for(i = alpm_option_get_cachedirs(); i; i = alpm_list_next(i)) {
snprintf(path, PATH_MAX, "%s%s", (char*)alpm_list_getdata(i),
filename);
- if(stat(path, &buf) == 0) {
- /* TODO maybe check to make sure it is readable? */
+ if(access(path, R_OK) == 0) {
retpath = strdup(path);
_alpm_log(PM_LOG_DEBUG, "found cached pkg: %s\n", retpath);
return(retpath);