mirror of
https://git.proxmox.com/git/mirror_lxc
synced 2025-08-03 04:24:00 +00:00
Replace asprintf by snprintf
This commit is contained in:
dlezcano
parent
19df00c503
commit
22ebac194e
@ -44,7 +44,8 @@ LXC_TTY_HANDLER(SIGQUIT);
|
||||
int lxc_execute(const char *name, int argc, char *argv[],
|
||||
lxc_callback_t preexec, void *data)
|
||||
{
|
||||
char *init = NULL, *val = NULL, *vinit = "[vinit]";
|
||||
char init[MAXPATHLEN];
|
||||
char *val = NULL, *vinit = "[vinit]";
|
||||
int fd, lock, sv[2], sync = 0, err = -1;
|
||||
pid_t pid;
|
||||
int clone_flags;
|
||||
@ -194,14 +195,19 @@ int lxc_execute(const char *name, int argc, char *argv[],
|
||||
goto err_child_failed;
|
||||
}
|
||||
|
||||
asprintf(&init, LXCPATH "/%s/init", name);
|
||||
snprintf(init, MAXPATHLEN, LXCPATH "/%s/init", name);
|
||||
|
||||
fd = open(init, O_WRONLY|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR);
|
||||
if (fd < 0) {
|
||||
lxc_log_syserror("failed to open %s", init);
|
||||
goto err_open;
|
||||
}
|
||||
|
||||
asprintf(&val, "%d", pid);
|
||||
if (!asprintf(&val, "%d", pid)) {
|
||||
lxc_log_syserror("failed to allocate memory");
|
||||
goto err_open;
|
||||
}
|
||||
|
||||
if (write(fd, val, strlen(val)) < 0) {
|
||||
lxc_log_syserror("failed to write init pid");
|
||||
goto err_write;
|
||||
@ -236,7 +242,6 @@ out:
|
||||
|
||||
lxc_unlink_nsgroup(name);
|
||||
unlink(init);
|
||||
free(init);
|
||||
free(val);
|
||||
lxc_put_lock(lock);
|
||||
|
||||
|
||||
@ -68,7 +68,9 @@ out:
|
||||
|
||||
int lxc_link_nsgroup(const char *name, pid_t pid)
|
||||
{
|
||||
char *lxc, *nsgroup, cgroup[MAXPATHLEN];
|
||||
char lxc[MAXPATHLEN];
|
||||
char nsgroup[MAXPATHLEN];
|
||||
char cgroup[MAXPATHLEN];
|
||||
int ret;
|
||||
|
||||
if (get_cgroup_mount(MTAB, cgroup)) {
|
||||
@ -76,29 +78,23 @@ int lxc_link_nsgroup(const char *name, pid_t pid)
|
||||
return -1;
|
||||
}
|
||||
|
||||
asprintf(&lxc, LXCPATH "/%s/nsgroup", name);
|
||||
asprintf(&nsgroup, "%s/%d", cgroup, pid);
|
||||
snprintf(lxc, MAXPATHLEN, LXCPATH "/%s/nsgroup", name);
|
||||
snprintf(nsgroup, MAXPATHLEN, "%s/%d", cgroup, pid);
|
||||
|
||||
unlink(lxc);
|
||||
ret = symlink(nsgroup, lxc);
|
||||
if (ret)
|
||||
lxc_log_syserror("failed to create symlink %s->%s",
|
||||
nsgroup, lxc);
|
||||
free(lxc);
|
||||
free(nsgroup);
|
||||
return ret;
|
||||
return ret;
|
||||
}
|
||||
|
||||
int lxc_unlink_nsgroup(const char *name)
|
||||
{
|
||||
char *nsgroup;
|
||||
int ret;
|
||||
char nsgroup[MAXPATHLEN];
|
||||
|
||||
asprintf(&nsgroup, LXCPATH "/%s/nsgroup", name);
|
||||
ret = unlink(nsgroup);
|
||||
free(nsgroup);
|
||||
|
||||
return ret;
|
||||
snprintf(nsgroup, MAXPATHLEN, LXCPATH "/%s/nsgroup", name);
|
||||
return unlink(nsgroup);
|
||||
}
|
||||
|
||||
int lxc_cgroup_set_priority(const char *name, int priority)
|
||||
@ -137,28 +133,26 @@ out:
|
||||
int lxc_cgroup_get_priority(const char *name, int *priority)
|
||||
{
|
||||
int fd, ret = -1;
|
||||
char *path, prio[MAXPRIOLEN];
|
||||
char path[MAXPATHLEN], prio[MAXPRIOLEN];
|
||||
|
||||
asprintf(&path, LXCPATH "/%s/nsgroup/cpu.shares", name);
|
||||
snprintf(path, MAXPATHLEN, LXCPATH "/%s/nsgroup/cpu.shares", name);
|
||||
|
||||
fd = open(path, O_RDONLY);
|
||||
if (fd < 0) {
|
||||
lxc_log_syserror("failed to open '%s'", path);
|
||||
goto out;
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (read(fd, prio, MAXPRIOLEN) < 0) {
|
||||
lxc_log_syserror("failed to read from '%s'", path);
|
||||
close(fd);
|
||||
goto out;
|
||||
}
|
||||
|
||||
close(fd);
|
||||
*priority = atoi(prio);
|
||||
|
||||
ret = 0;
|
||||
out:
|
||||
free(path);
|
||||
close(fd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
@ -132,9 +132,9 @@ out:
|
||||
static int write_info(const char *path, const char *file, const char *info)
|
||||
{
|
||||
int fd, err = -1;
|
||||
char *f;
|
||||
char f[MAXPATHLEN];
|
||||
|
||||
asprintf(&f, "%s/%s", path, file);
|
||||
snprintf(f, MAXPATHLEN, "%s/%s", path, file);
|
||||
fd = creat(f, 0755);
|
||||
if (fd < 0)
|
||||
goto out;
|
||||
@ -145,7 +145,6 @@ static int write_info(const char *path, const char *file, const char *info)
|
||||
err = 0;
|
||||
out:
|
||||
close(fd);
|
||||
free(f);
|
||||
return err;
|
||||
|
||||
out_write:
|
||||
@ -156,9 +155,9 @@ out_write:
|
||||
static int read_info(const char *path, const char *file, char *info, size_t len)
|
||||
{
|
||||
int fd, ret = -1;
|
||||
char *f, *token;
|
||||
char f[MAXPATHLEN], *token;
|
||||
|
||||
asprintf(&f, "%s/%s", path, file);
|
||||
snprintf(f, MAXPATHLEN, "%s/%s", path, file);
|
||||
fd = open(f, O_RDONLY);
|
||||
if (fd < 0) {
|
||||
if (errno == ENOENT)
|
||||
@ -176,18 +175,16 @@ static int read_info(const char *path, const char *file, char *info, size_t len)
|
||||
ret = 0;
|
||||
out:
|
||||
close(fd);
|
||||
free(f);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int delete_info(const char *path, const char *file)
|
||||
{
|
||||
char *info;
|
||||
char info[MAXPATHLEN];
|
||||
int ret;
|
||||
|
||||
asprintf(&info, "%s/%s", path, file);
|
||||
snprintf(info, MAXPATHLEN, "%s/%s", path, file);
|
||||
ret = unlink(info);
|
||||
free(info);
|
||||
|
||||
return ret;
|
||||
}
|
||||
@ -196,7 +193,7 @@ static int configure_ip4addr(int fd, struct lxc_inetdev *in)
|
||||
{
|
||||
char addr[INET6_ADDRSTRLEN];
|
||||
char bcast[INET_ADDRSTRLEN];
|
||||
char *line = NULL;
|
||||
char line[MAXLINELEN];
|
||||
int err = -1;
|
||||
|
||||
if (!inet_ntop(AF_INET, &in->addr, addr, sizeof(addr))) {
|
||||
@ -210,9 +207,9 @@ static int configure_ip4addr(int fd, struct lxc_inetdev *in)
|
||||
}
|
||||
|
||||
if (in->prefix)
|
||||
asprintf(&line, "%s/%d %s\n", addr, in->prefix, bcast);
|
||||
snprintf(line, MAXLINELEN, "%s/%d %s\n", addr, in->prefix, bcast);
|
||||
else
|
||||
asprintf(&line, "%s %s\n", addr, bcast);
|
||||
snprintf(line, MAXLINELEN, "%s %s\n", addr, bcast);
|
||||
|
||||
if (write(fd, line, strlen(line)) < 0) {
|
||||
lxc_log_syserror("failed to write address info");
|
||||
@ -221,14 +218,13 @@ static int configure_ip4addr(int fd, struct lxc_inetdev *in)
|
||||
|
||||
err = 0;
|
||||
err:
|
||||
free(line);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int configure_ip6addr(int fd, struct lxc_inet6dev *in6)
|
||||
{
|
||||
char addr[INET6_ADDRSTRLEN];
|
||||
char *line = NULL;
|
||||
char line[MAXLINELEN];
|
||||
int err = -1;
|
||||
|
||||
if (!inet_ntop(AF_INET6, &in6->addr, addr, sizeof(addr))) {
|
||||
@ -236,7 +232,7 @@ static int configure_ip6addr(int fd, struct lxc_inet6dev *in6)
|
||||
goto err;
|
||||
}
|
||||
|
||||
asprintf(&line, "%s/%d\n", addr, in6->prefix?in6->prefix:64);
|
||||
snprintf(line, MAXLINELEN, "%s/%d\n", addr, in6->prefix?in6->prefix:64);
|
||||
|
||||
if (write(fd, line, strlen(line)) < 0) {
|
||||
lxc_log_syserror("failed to write address info");
|
||||
@ -245,7 +241,6 @@ static int configure_ip6addr(int fd, struct lxc_inet6dev *in6)
|
||||
|
||||
err = 0;
|
||||
err:
|
||||
free(line);
|
||||
return err;
|
||||
}
|
||||
|
||||
@ -429,14 +424,14 @@ static int configure_rootfs(const char *name, const char *rootfs)
|
||||
|
||||
static int configure_mount(const char *name, const char *fstab)
|
||||
{
|
||||
char *path;
|
||||
char path[MAXPATHLEN];
|
||||
struct stat stat;
|
||||
int infd, outfd;
|
||||
void *src, *dst;
|
||||
char c = '\0';
|
||||
int ret = -1;
|
||||
|
||||
asprintf(&path, LXCPATH "/%s/fstab", name);
|
||||
snprintf(path, MAXPATHLEN, LXCPATH "/%s/fstab", name);
|
||||
|
||||
outfd = open(path, O_RDWR|O_CREAT|O_EXCL, 0640);
|
||||
if (outfd < 0) {
|
||||
@ -447,35 +442,35 @@ static int configure_mount(const char *name, const char *fstab)
|
||||
infd = open(fstab, O_RDONLY);
|
||||
if (infd < 0) {
|
||||
lxc_log_syserror("failed to open '%s'", fstab);
|
||||
goto out;
|
||||
goto out_open;
|
||||
}
|
||||
|
||||
if (fstat(infd, &stat)) {
|
||||
lxc_log_syserror("failed to stat '%s'", fstab);
|
||||
goto out;
|
||||
goto out_open2;
|
||||
}
|
||||
|
||||
if (lseek(outfd, stat.st_size - 1, SEEK_SET) < 0) {
|
||||
lxc_log_syserror("failed to seek dest file '%s'", path);
|
||||
goto out;
|
||||
goto out_open2;
|
||||
}
|
||||
|
||||
/* fixup length */
|
||||
if (write(outfd, &c, 1) < 0) {
|
||||
lxc_log_syserror("failed to write to '%s'", path);
|
||||
goto out;
|
||||
goto out_open2;
|
||||
}
|
||||
|
||||
src = mmap(NULL, stat.st_size, PROT_READ, MAP_SHARED, infd, 0L);
|
||||
if (src == MAP_FAILED) {
|
||||
lxc_log_syserror("failed to mmap '%s'", fstab);
|
||||
goto out;
|
||||
goto out_open2;
|
||||
}
|
||||
|
||||
dst = mmap(NULL, stat.st_size, PROT_WRITE, MAP_SHARED, outfd, 0L);
|
||||
if (dst == MAP_FAILED) {
|
||||
lxc_log_syserror("failed to mmap '%s'", path);
|
||||
goto out;
|
||||
goto out_mmap;
|
||||
}
|
||||
|
||||
memcpy(dst, src, stat.st_size);
|
||||
@ -485,8 +480,16 @@ static int configure_mount(const char *name, const char *fstab)
|
||||
|
||||
ret = 0;
|
||||
out:
|
||||
free(path);
|
||||
return ret;
|
||||
|
||||
out_mmap:
|
||||
munmap(src, stat.st_size);
|
||||
out_open2:
|
||||
close(infd);
|
||||
out_open:
|
||||
unlink(path);
|
||||
close(outfd);
|
||||
goto out;
|
||||
}
|
||||
|
||||
static int unconfigure_ip_addresses(const char *dirname)
|
||||
@ -946,9 +949,12 @@ static int instanciate_veth(const char *dirname, const char *file, pid_t pid)
|
||||
char bridge[IFNAMSIZ];
|
||||
int ifindex, ret = -1;
|
||||
|
||||
asprintf(&veth1, "%s_%d", file, pid);
|
||||
asprintf(&veth2, "%s~%d", file, pid);
|
||||
asprintf(&path, "%s/%s", dirname, file);
|
||||
if (!asprintf(&veth1, "%s_%d", file, pid) ||
|
||||
!asprintf(&veth2, "%s~%d", file, pid) ||
|
||||
!asprintf(&path, "%s/%s", dirname, file)) {
|
||||
lxc_log_syserror("failed to allocate memory");
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (read_info(path, "link", bridge, IFNAMSIZ)) {
|
||||
lxc_log_error("failed to read bridge info");
|
||||
@ -966,7 +972,11 @@ static int instanciate_veth(const char *dirname, const char *file, pid_t pid)
|
||||
goto out;
|
||||
}
|
||||
|
||||
asprintf(&strindex, "%d", ifindex);
|
||||
if (!asprintf(&strindex, "%d", ifindex)) {
|
||||
lxc_log_syserror("failed to allocate memory");
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (write_info(path, "ifindex", strindex)) {
|
||||
lxc_log_error("failed to write interface index to %s", path);
|
||||
goto out;
|
||||
@ -993,7 +1003,11 @@ static int instanciate_macvlan(const char *dirname, const char *file, pid_t pid)
|
||||
char link[IFNAMSIZ];
|
||||
int ifindex, ret = -1;
|
||||
|
||||
asprintf(&peer, "%s~%d", file, pid);
|
||||
if (!asprintf(&peer, "%s~%d", file, pid)) {
|
||||
lxc_log_syserror("failed to allocate memory");
|
||||
return -1;
|
||||
}
|
||||
|
||||
snprintf(path, MAXPATHLEN, "%s/%s", dirname, file);
|
||||
if (read_info(path, "link", link, IFNAMSIZ)) {
|
||||
lxc_log_error("failed to read bridge info");
|
||||
@ -1011,7 +1025,11 @@ static int instanciate_macvlan(const char *dirname, const char *file, pid_t pid)
|
||||
goto out;
|
||||
}
|
||||
|
||||
asprintf(&strindex, "%d", ifindex);
|
||||
if (!asprintf(&strindex, "%d", ifindex)) {
|
||||
lxc_log_syserror("failed to allocate memory");
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (write_info(path, "ifindex", strindex)) {
|
||||
lxc_log_error("failed to write interface index to %s", path);
|
||||
goto out;
|
||||
@ -1042,7 +1060,11 @@ static int instanciate_phys(const char *dirname, const char *file, pid_t pid)
|
||||
goto out;
|
||||
}
|
||||
|
||||
asprintf(&strindex, "%d", ifindex);
|
||||
if (!asprintf(&strindex, "%d", ifindex)) {
|
||||
lxc_log_syserror("failed to allocate memory");
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (write_info(path, "ifindex", strindex)) {
|
||||
lxc_log_error("failed to write interface index to %s", path);
|
||||
goto out;
|
||||
@ -1095,14 +1117,10 @@ static int instanciate_netdev_cb(const char *name, const char *dirname,
|
||||
|
||||
static int instanciate_netdev(const char *name, pid_t pid)
|
||||
{
|
||||
char *dirname;
|
||||
int ret;
|
||||
char dirname[MAXPATHLEN];
|
||||
|
||||
asprintf(&dirname, LXCPATH "/%s/network", name);
|
||||
ret = dir_for_each(name, dirname, instanciate_netdev_cb, &pid);
|
||||
free(dirname);
|
||||
|
||||
return ret;
|
||||
snprintf(dirname, MAXPATHLEN, LXCPATH "/%s/network", name);
|
||||
return dir_for_each(name, dirname, instanciate_netdev_cb, &pid);
|
||||
}
|
||||
|
||||
static int move_netdev_cb(const char *name, const char *dirname,
|
||||
@ -1138,14 +1156,9 @@ static int move_netdev_cb(const char *name, const char *dirname,
|
||||
|
||||
static int move_netdev(const char *name, pid_t pid)
|
||||
{
|
||||
char *dirname;
|
||||
int ret;
|
||||
|
||||
asprintf(&dirname, LXCPATH "/%s/network", name);
|
||||
ret = dir_for_each(name, dirname, move_netdev_cb, &pid);
|
||||
free(dirname);
|
||||
|
||||
return ret;
|
||||
char dirname[MAXPATHLEN];
|
||||
snprintf(dirname, MAXPATHLEN, LXCPATH "/%s/network", name);
|
||||
return dir_for_each(name, dirname, move_netdev_cb, &pid);
|
||||
}
|
||||
|
||||
int conf_create_network(const char *name, pid_t pid)
|
||||
@ -1206,14 +1219,10 @@ static int delete_netdev_cb(const char *name, const char *dirname,
|
||||
|
||||
static int delete_netdev(const char *name)
|
||||
{
|
||||
char *dirname;
|
||||
int ret;
|
||||
char dirname[MAXPATHLEN];
|
||||
|
||||
asprintf(&dirname, LXCPATH "/%s/network", name);
|
||||
ret = dir_for_each(name, dirname, delete_netdev_cb, NULL);
|
||||
free(dirname);
|
||||
|
||||
return ret;
|
||||
snprintf(dirname, MAXPATHLEN, LXCPATH "/%s/network", name);
|
||||
return dir_for_each(name, dirname, delete_netdev_cb, NULL);
|
||||
}
|
||||
|
||||
int conf_destroy_network(const char *name)
|
||||
|
||||
@ -28,15 +28,16 @@
|
||||
#include <unistd.h>
|
||||
#include <stdlib.h>
|
||||
#include <sys/file.h>
|
||||
#include <sys/param.h>
|
||||
|
||||
#include <lxc/lxc.h>
|
||||
|
||||
int lxc_get_lock(const char *name)
|
||||
{
|
||||
char *lock;
|
||||
char lock[MAXPATHLEN];
|
||||
int fd, ret;
|
||||
|
||||
asprintf(&lock, LXCPATH "/%s", name);
|
||||
snprintf(lock, MAXPATHLEN, LXCPATH "/%s", name);
|
||||
fd = open(lock, O_RDONLY|O_DIRECTORY, S_IRUSR|S_IWUSR);
|
||||
if (fd < 0) {
|
||||
ret = -errno;
|
||||
@ -53,7 +54,6 @@ int lxc_get_lock(const char *name)
|
||||
|
||||
ret = fd;
|
||||
out:
|
||||
free(lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
@ -436,19 +436,15 @@ static int proc_sys_net_write(const char *path, const char *value)
|
||||
|
||||
static int ip_forward_set(const char *ifname, int family, int flag)
|
||||
{
|
||||
char *path;
|
||||
int ret;
|
||||
char path[MAXPATHLEN];
|
||||
|
||||
if (family != AF_INET && family != AF_INET6)
|
||||
return -1;
|
||||
|
||||
asprintf(&path, "/proc/sys/net/%s/conf/%s/forwarding",
|
||||
snprintf(path, MAXPATHLEN, "/proc/sys/net/%s/conf/%s/forwarding",
|
||||
family == AF_INET?"ipv4":"ipv6" , ifname);
|
||||
|
||||
ret = proc_sys_net_write(path, flag?"1":"0");
|
||||
free(path);
|
||||
|
||||
return ret;
|
||||
return proc_sys_net_write(path, flag?"1":"0");
|
||||
}
|
||||
|
||||
int ip_forward_on(const char *ifname, int family)
|
||||
|
||||
@ -70,7 +70,8 @@ int opentty(const char *ttyname)
|
||||
int lxc_start(const char *name, int argc, char *argv[],
|
||||
lxc_callback_t prestart, void *data)
|
||||
{
|
||||
char *init = NULL, *val = NULL;
|
||||
char init[MAXPATHLEN];
|
||||
char *val = NULL;
|
||||
char ttyname[MAXPATHLEN];
|
||||
int fd, lock, sv[2], sync = 0, err = -1;
|
||||
pid_t pid;
|
||||
@ -213,7 +214,9 @@ int lxc_start(const char *name, int argc, char *argv[],
|
||||
}
|
||||
|
||||
asprintf(&val, "%d\n", pid);
|
||||
asprintf(&init, LXCPATH "/%s/init", name);
|
||||
|
||||
snprintf(init, MAXPATHLEN, LXCPATH "/%s/init", name);
|
||||
|
||||
fd = open(init, O_WRONLY|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR);
|
||||
if (fd < 0) {
|
||||
lxc_log_syserror("failed to open '%s'", init);
|
||||
@ -257,7 +260,6 @@ out:
|
||||
|
||||
lxc_unlink_nsgroup(name);
|
||||
unlink(init);
|
||||
free(init);
|
||||
free(val);
|
||||
lxc_put_lock(lock);
|
||||
|
||||
@ -284,6 +286,5 @@ err_fork_ns:
|
||||
LXC_TTY_DEL_HANDLER(SIGINT);
|
||||
close(sv[0]);
|
||||
close(sv[1]);
|
||||
err:
|
||||
goto out;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user