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make use of the copy file function

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Now we have specific function to copy the files, make use of it
and remove the old code.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
This commit is contained in:
Daniel Lezcano 2009-05-28 12:10:50 +02:00
parent e3642c43e6
commit 64e1ae63eb
1 changed files with 4 additions and 60 deletions
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64
src/lxc/conf.c
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@ -644,71 +644,15 @@ static int configure_pts(const char *name, int pts)
static int configure_mount(const char *name, const char *fstab) static int configure_mount(const char *name, const char *fstab)
{ {
char path[MAXPATHLEN]; char path[MAXPATHLEN];
struct stat stat;
int infd, outfd;
void *src, *dst;
char c = '\0';
int ret = -1;
snprintf(path, MAXPATHLEN, LXCPATH "/%s/fstab", name); snprintf(path, MAXPATHLEN, LXCPATH "/%s/fstab", name);
outfd = open(path, O_RDWR|O_CREAT|O_EXCL, 0640); if (lxc_copy_file(fstab, path)) {
if (outfd < 0) { ERROR("failed to copy the fstab file");
SYSERROR("failed to creat '%s'", path); return -1;
goto out;
} }
infd = open(fstab, O_RDONLY); return 0;
if (infd < 0) {
SYSERROR("failed to open '%s'", fstab);
goto out_open;
}
if (fstat(infd, &stat)) {
SYSERROR("failed to stat '%s'", fstab);
goto out_open2;
}
if (lseek(outfd, stat.st_size - 1, SEEK_SET) < 0) {
SYSERROR("failed to seek dest file '%s'", path);
goto out_open2;
}
/* fixup length */
if (write(outfd, &c, 1) < 0) {
SYSERROR("failed to write to '%s'", path);
goto out_open2;
}
src = mmap(NULL, stat.st_size, PROT_READ, MAP_SHARED, infd, 0L);
if (src == MAP_FAILED) {
SYSERROR("failed to mmap '%s'", fstab);
goto out_open2;
}
dst = mmap(NULL, stat.st_size, PROT_WRITE, MAP_SHARED, outfd, 0L);
if (dst == MAP_FAILED) {
SYSERROR("failed to mmap '%s'", path);
goto out_mmap;
}
memcpy(dst, src, stat.st_size);
munmap(src, stat.st_size);
munmap(dst, stat.st_size);
ret = 0;
out:
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 *directory) static int unconfigure_ip_addresses(const char *directory)