Avoid nesting and improve readability.
Signed-off-by: David Ward <david.w...@ll.mit.edu>
---
src/lxc/cgroup.c | 66 ++++++++++++++++++++++++-----------------------------
1 files changed, 30 insertions(+), 36 deletions(-)
diff --git a/src/lxc/cgroup.c b/src/lxc/cgroup.c
index cc3910a..c915b52 100644
--- a/src/lxc/cgroup.c
+++ b/src/lxc/cgroup.c
@@ -142,6 +142,7 @@ static int get_cgroup_mount(const char *subsystem, char
*mnt)
struct mntent *mntent;
char initcgroup[MAXPATHLEN];
FILE *file = NULL;
+ int ret, err = -1;
file = setmntent(MTAB, "r");
if (!file) {
@@ -150,30 +151,27 @@ static int get_cgroup_mount(const char *subsystem, char
*mnt)
}
while ((mntent = getmntent(file))) {
-
if (strcmp(mntent->mnt_type, "cgroup"))
continue;
- if (!subsystem || hasmntopt_multiple(mntent, subsystem)) {
- int ret;
- ret = snprintf(mnt, MAXPATHLEN, "%s%s/lxc",
- mntent->mnt_dir,
- get_init_cgroup(subsystem, NULL,
- initcgroup));
- if (ret < 0 || ret >= MAXPATHLEN)
- goto fail;
- fclose(file);
- DEBUG("using cgroup mounted at '%s'", mnt);
- return 0;
- }
+ if (subsystem && !hasmntopt_multiple(mntent, subsystem))
+ continue;
+
+ ret = snprintf(mnt, MAXPATHLEN, "%s%s/lxc", mntent->mnt_dir,
+ get_init_cgroup(subsystem, NULL, initcgroup));
+ if (ret < 0 || ret >= MAXPATHLEN)
+ goto fail;
+
+ DEBUG("using cgroup mounted at '%s'", mnt);
+ err = 0;
+ goto out;
};
fail:
DEBUG("Failed to find cgroup for %s\n",
subsystem ? subsystem : "(NULL)");
-
- fclose(file);
-
- return -1;
+out:
+ endmntent(file);
+ return err;
}
int lxc_ns_is_mounted(void)
@@ -398,18 +396,17 @@ int lxc_cgroup_create(const char *name, pid_t pid)
}
while ((mntent = getmntent(file))) {
-
DEBUG("checking '%s' (%s)", mntent->mnt_dir, mntent->mnt_type);
- if (!strcmp(mntent->mnt_type, "cgroup")) {
+ if (strcmp(mntent->mnt_type, "cgroup"))
+ continue;
- INFO("[%d] found cgroup mounted at '%s',opts='%s'",
- ++found, mntent->mnt_dir, mntent->mnt_opts);
+ INFO("[%d] found cgroup mounted at '%s',opts='%s'",
+ ++found, mntent->mnt_dir, mntent->mnt_opts);
- err = lxc_one_cgroup_create(name, mntent, pid);
- if (err)
- goto out;
- }
+ err = lxc_one_cgroup_create(name, mntent, pid);
+ if (err)
+ goto out;
};
if (!found)
@@ -485,7 +482,7 @@ int lxc_cgroup_destroy(const char *name)
{
struct mntent *mntent;
FILE *file = NULL;
- int ret, err = -1;
+ int err = -1;
file = setmntent(MTAB, "r");
if (!file) {
@@ -494,18 +491,15 @@ int lxc_cgroup_destroy(const char *name)
}
while ((mntent = getmntent(file))) {
- if (!strcmp(mntent->mnt_type, "cgroup")) {
- ret = lxc_one_cgroup_destroy(mntent, name);
- if (ret) {
- fclose(file);
- return ret;
- }
- err = 0;
- }
- }
+ if (strcmp(mntent->mnt_type, "cgroup"))
+ continue;
- fclose(file);
+ err = lxc_one_cgroup_destroy(mntent, name);
+ if (err)
+ break;
+ }
+ endmntent(file);
return err;
}
/*
--
1.7.1
------------------------------------------------------------------------------
Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - but cloud computing
also focuses on allowing computing to be delivered as a service.
http://www.accelacomm.com/jaw/sfnl/114/51521223/
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