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libkvm: Use O_CLOEXEC instead of separate fcntl(F_SETFD) call.

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MFC after:	1 week
This commit is contained in:
Jilles Tjoelker 2013-05-04 09:47:51 +00:00
parent 4136c09143
commit 76dce67f0f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=250230
1 changed files with 4 additions and 15 deletions
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19
lib/libkvm/kvm.c
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@ -166,7 +166,7 @@ _kvm_open(kvm_t *kd, const char *uf, const char *mf, int flag, char *errout)
if (mf == 0)
mf = _PATH_MEM;
if ((kd->pmfd = open(mf, flag, 0)) < 0) {
if ((kd->pmfd = open(mf, flag | O_CLOEXEC, 0)) < 0) {
_kvm_syserr(kd, kd->program, "%s", mf);
goto failed;
}
@ -179,10 +179,6 @@ _kvm_open(kvm_t *kd, const char *uf, const char *mf, int flag, char *errout)
_kvm_syserr(kd, kd->program, "empty file");
goto failed;
}
if (fcntl(kd->pmfd, F_SETFD, FD_CLOEXEC) < 0) {
_kvm_syserr(kd, kd->program, "%s", mf);
goto failed;
}
if (S_ISCHR(st.st_mode)) {
/*
* If this is a character special device, then check that
@ -194,11 +190,8 @@ _kvm_open(kvm_t *kd, const char *uf, const char *mf, int flag, char *errout)
kd->vmfd = open(_PATH_DEVNULL, O_RDONLY);
return (kd);
} else if (strcmp(mf, _PATH_MEM) == 0) {
if ((kd->vmfd = open(_PATH_KMEM, flag)) < 0) {
_kvm_syserr(kd, kd->program, "%s", _PATH_KMEM);
goto failed;
}
if (fcntl(kd->vmfd, F_SETFD, FD_CLOEXEC) < 0) {
if ((kd->vmfd = open(_PATH_KMEM, flag | O_CLOEXEC)) <
0) {
_kvm_syserr(kd, kd->program, "%s", _PATH_KMEM);
goto failed;
}
@ -210,11 +203,7 @@ _kvm_open(kvm_t *kd, const char *uf, const char *mf, int flag, char *errout)
* Initialize the virtual address translation machinery,
* but first setup the namelist fd.
*/
if ((kd->nlfd = open(uf, O_RDONLY, 0)) < 0) {
_kvm_syserr(kd, kd->program, "%s", uf);
goto failed;
}
if (fcntl(kd->nlfd, F_SETFD, FD_CLOEXEC) < 0) {
if ((kd->nlfd = open(uf, O_RDONLY | O_CLOEXEC, 0)) < 0) {
_kvm_syserr(kd, kd->program, "%s", uf);
goto failed;
}