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#include "fs.h"
#include "log.h"
#include "config.h"
#include <fcntl.h>
#include <stdio.h>
#include <ctype.h>
#include <unistd.h>
#include <stdint.h>
#include <stdlib.h>
#include <limits.h>
#include <dirent.h>
#include <string.h>
#include <strings.h>
#include <sys/stat.h>
#ifdef __linux__
#include <sys/sendfile.h>
#endif
#define BUFSIZE 8192
#define CONTENTDIR "content"
#define DEFAULTALBUM "unorganized"
/*
* File extensions based on which we add files to the list of images to be
* processed.
*/
static const char *img_extensions[] = {
"jpg",
"jpeg",
"png",
"tiff",
NULL,
};
const char *
rbasename(const char *path)
{
char *delim = strrchr(path, '/');
if (delim == NULL) {
return path;
}
return delim + 1;
}
bool
nmkdir(const char *path, struct stat *dstat, bool dry)
{
if (dry) {
if (stat(path, dstat)) {
if (errno == ENOENT) {
log_printl(LOG_DETAIL, "Created directory %s", path);
return true;
}
log_printl_errno(LOG_FATAL, "Can't read %s", path);
return false;
}
if (!S_ISDIR(dstat->st_mode)) {
log_printl(LOG_FATAL, "%s is not a directory", path);
return false;
}
return true;
}
if(mkdir(path, 0755) < 0) {
if (errno == EEXIST) {
if (stat(path, dstat)) {
log_printl_errno(LOG_FATAL, "Can't read %s", path);
return false;
}
if (!S_ISDIR(dstat->st_mode)) {
log_printl(LOG_FATAL, "%s is not a directory", path);
return false;
}
} else {
log_printl_errno(LOG_FATAL, "Can't make directory %s", path);
return false;
}
} else {
log_printl(LOG_DETAIL, "Created directory %s", path);
}
return true;
}
char *
joinpath(const char *restrict a, const char *restrict b)
{
char *fpath = malloc(strlen(a) + strlen(b) + 2);
joinpathb(fpath, a, b);
return fpath;
}
bool
isimage(const char *fname)
{
char *ext = strrchr(fname, '.');
if (!ext || *(ext + 1) == '\0') return false;
ext++;
for (size_t i = 0; img_extensions[i] != NULL; i++) {
if (!strcasecmp(ext, img_extensions[i])) return true;
}
return false;
}
const char *
delext(const char *restrict basename, char *restrict buf, size_t n)
{
const char *ext = strrchr(basename, '.');
size_t i = ext - basename;
if (i + 1 > n) return NULL;
memcpy(buf, basename, i);
buf[i] = '\0';
return ext;
}
int
file_is_uptodate(const char *path, const struct timespec *srcmtim)
{
struct stat dststat;
if (stat(path, &dststat)) {
if (errno != ENOENT) {
log_printl_errno(LOG_FATAL, "Can't read file %s", path);
return -1;
}
return 0;
} else if (dststat.st_mtim.tv_sec != srcmtim->tv_sec
|| dststat.st_mtim.tv_nsec != srcmtim->tv_nsec) {
return 0;
}
return 1;
}
void
setdatetime(const char *path, const struct timespec *mtim)
{
struct timespec tms[] = {
{ .tv_sec = mtim->tv_sec, .tv_nsec = mtim->tv_nsec },
{ .tv_sec = mtim->tv_sec, .tv_nsec = mtim->tv_nsec },
};
if (utimensat(AT_FDCWD, path, tms, 0) == -1) {
log_printl_errno(LOG_ERROR, "Warning: couldn't set times of %s", path);
}
}
bool
filesync(const char *restrict srcpath, const char *restrict dstpath)
{
int fdsrc;
struct stat stsrc;
fdsrc = open(srcpath, O_RDONLY);
if (fdsrc < 0) return false;
if (fstat(fdsrc, &stsrc)) goto dir_error;
if (S_ISDIR(stsrc.st_mode)) {
if (mkdir(dstpath, 0755)) {
if (errno != EEXIST) goto dir_error;
if (stat(dstpath, &stsrc)) goto dir_error;
if (!S_ISDIR(stsrc.st_mode)){
errno = ENOTDIR;
goto dir_error;
}
}
DIR *dir = fdopendir(fdsrc);
if (dir == NULL) goto dir_error;
struct dirent *ent;
while ((ent = readdir(dir))) {
if (!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..")) {
continue;
}
char entsrc[PATH_MAX], entdst[PATH_MAX];
sprintf(entsrc, "%s/%s", srcpath, ent->d_name);
sprintf(entdst, "%s/%s", dstpath, ent->d_name);
if (filesync(entsrc, entdst)) {
closedir(dir);
goto dir_error;
}
}
closedir(dir);
goto dir_success;
}
int fddst, uptodate;
if ((uptodate = file_is_uptodate(dstpath, &stsrc.st_mtim)) > 0) {
goto dir_success;
} else if (uptodate < 0) {
goto dir_error;
}
fddst = open(dstpath, O_CREAT | O_WRONLY | O_TRUNC, 0644);
if (fddst < 0) goto dir_error;
#ifdef __linux__
ssize_t nwrote = sendfile(fddst, fdsrc, NULL, stsrc.st_size);
if (nwrote != stsrc.st_size) goto copy_error;
#else
char buf[BUFSIZE];
ssize_t nread;
while ((nread = read(fdsrc, buf, BUFSIZE)) > 0) {
ssize_t nwrote = write(fddst, buf, nread);
if (nread != nwrote) goto copy_error;
}
if (nread < 0) goto copy_error;
#endif
struct timespec tms[] = {
{ .tv_sec = stsrc.st_mtim.tv_sec, .tv_nsec = stsrc.st_mtim.tv_nsec },
{ .tv_sec = stsrc.st_mtim.tv_sec, .tv_nsec = stsrc.st_mtim.tv_nsec },
};
futimens(fddst, tms);
log_printl(LOG_DETAIL, "Copied %s", srcpath);
close(fddst);
dir_success:
close(fdsrc);
return true;
copy_error:
close(fddst);
dir_error:
close(fdsrc);
return false;
}
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