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From 0f27acb41229aa29d539f1975c36c78f75fdf11c Mon Sep 17 00:00:00 2001
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Message-Id: <0f27acb41229aa29d539f1975c36c78f75fdf11c@dist-git>
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From: Michal Privoznik <mprivozn@redhat.com>
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Date: Tue, 30 Jul 2019 15:30:53 +0200
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Subject: [PATCH] vircommand: Separate mass FD closing into a function
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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I will optimize this code a bit in the next commit. But for that
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it is better if the code lives in a separate function.
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Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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(cherry picked from commit c1a9bfbbba48fea44fdfbe532e084c5323c9c9b3)
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Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1721434
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Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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Message-Id: <6de04910a1dc7c2e5554983b504b1a9932411a60.1564493409.git.mprivozn@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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---
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src/util/vircommand.c | 52 ++++++++++++++++++++++++++++---------------
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1 file changed, 34 insertions(+), 18 deletions(-)
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diff --git a/src/util/vircommand.c b/src/util/vircommand.c
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index d328431373..8ae9a952a3 100644
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--- a/src/util/vircommand.c
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+++ b/src/util/vircommand.c
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@@ -491,6 +491,37 @@ virExecCommon(virCommandPtr cmd, gid_t *groups, int ngroups)
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return ret;
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}
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+static int
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+virCommandMassClose(virCommandPtr cmd,
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+ int childin,
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+ int childout,
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+ int childerr)
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+{
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+ int openmax = sysconf(_SC_OPEN_MAX);
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+ int fd;
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+ int tmpfd;
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+
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+ if (openmax < 0) {
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+ virReportSystemError(errno, "%s",
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+ _("sysconf(_SC_OPEN_MAX) failed"));
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+ return -1;
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+ }
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+
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+ for (fd = 3; fd < openmax; fd++) {
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+ if (fd == childin || fd == childout || fd == childerr)
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+ continue;
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+ if (!virCommandFDIsSet(cmd, fd)) {
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+ tmpfd = fd;
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+ VIR_MASS_CLOSE(tmpfd);
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+ } else if (virSetInherit(fd, true) < 0) {
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+ virReportSystemError(errno, _("failed to preserve fd %d"), fd);
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+ return -1;
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+ }
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+ }
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+
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+ return 0;
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+}
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+
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/*
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* virExec:
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* @cmd virCommandPtr containing all information about the program to
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@@ -500,13 +531,12 @@ static int
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virExec(virCommandPtr cmd)
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{
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pid_t pid;
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- int null = -1, fd, openmax;
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+ int null = -1;
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int pipeout[2] = {-1, -1};
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int pipeerr[2] = {-1, -1};
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int childin = cmd->infd;
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int childout = -1;
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int childerr = -1;
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- int tmpfd;
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VIR_AUTOFREE(char *) binarystr = NULL;
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const char *binary = NULL;
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int ret;
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@@ -612,23 +642,9 @@ virExec(virCommandPtr cmd)
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if (cmd->mask)
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umask(cmd->mask);
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ret = EXIT_CANCELED;
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- openmax = sysconf(_SC_OPEN_MAX);
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- if (openmax < 0) {
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- virReportSystemError(errno, "%s",
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- _("sysconf(_SC_OPEN_MAX) failed"));
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+
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+ if (virCommandMassClose(cmd, childin, childout, childerr) < 0)
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goto fork_error;
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- }
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- for (fd = 3; fd < openmax; fd++) {
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- if (fd == childin || fd == childout || fd == childerr)
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- continue;
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- if (!virCommandFDIsSet(cmd, fd)) {
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- tmpfd = fd;
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- VIR_MASS_CLOSE(tmpfd);
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- } else if (virSetInherit(fd, true) < 0) {
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- virReportSystemError(errno, _("failed to preserve fd %d"), fd);
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- goto fork_error;
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- }
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- }
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if (prepareStdFd(childin, STDIN_FILENO) < 0) {
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virReportSystemError(errno,
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--
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2.22.0
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