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/*
* blogc: A blog compiler.
* Copyright (C) 2014-2017 Rafael G. Martins <rafael@rafaelmartins.eng.br>
*
* This program can be distributed under the terms of the BSD License.
* See the file LICENSE.
*/
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <dirent.h>
#include <fcntl.h>
#include <unistd.h>
#include <libgen.h>
#include <errno.h>
#include <squareball.h>
#include "exec-native.h"
#include "ctx.h"
#define BM_FILE_CHUNK_SIZE 1024
int
bm_exec_native_cp(bm_filectx_t *source, bm_filectx_t *dest, bool verbose)
{
if (verbose)
printf("Copying '%s' to '%s'\n", source->path, dest->path);
else
printf(" COPY %s\n", dest->short_path);
fflush(stdout);
char *fname = sb_strdup(dest->path);
for (char *tmp = fname; *tmp != '\0'; tmp++) {
if (*tmp != '/' && *tmp != '\\')
continue;
char bkp = *tmp;
*tmp = '\0';
if ((strlen(fname) > 0) &&
(-1 == mkdir(fname, 0777)) &&
(errno != EEXIST))
{
fprintf(stderr, "blogc-make: error: failed to create output "
"directory (%s): %s\n", fname, strerror(errno));
free(fname);
exit(2);
}
*tmp = bkp;
}
free(fname);
int fd_from = open(source->path, O_RDONLY);
if (fd_from < 0) {
fprintf(stderr, "blogc-make: error: failed to open source file to copy "
" (%s): %s\n", source->path, strerror(errno));
return 3;
}
int fd_to = open(dest->path, O_WRONLY | O_CREAT | O_TRUNC, 0666);
if (fd_to < 0) {
fprintf(stderr, "blogc-make: error: failed to open destination file to "
"copy (%s): %s\n", dest->path, strerror(errno));
close(fd_from);
return 3;
}
ssize_t nread;
char buffer[BM_FILE_CHUNK_SIZE];
while (0 < (nread = read(fd_from, buffer, BM_FILE_CHUNK_SIZE))) {
char *out_ptr = buffer;
do {
ssize_t nwritten = write(fd_to, out_ptr, nread);
if (nwritten == -1) {
fprintf(stderr, "blogc-make: error: failed to write to "
"destination file (%s): %s\n", dest->path, strerror(errno));
close(fd_from);
close(fd_to);
return 3;
}
nread -= nwritten;
out_ptr += nwritten;
} while (nread > 0);
}
return 0;
}
bool
bm_exec_native_is_empty_dir(const char *dir, sb_error_t **err)
{
DIR *d = opendir(dir);
if (d == NULL) {
if (errno == ENOENT) {
return true;
}
if (err != NULL) {
*err = sb_error_new_printf(0, "failed to open directory (%s): %s\n",
dir, strerror(errno));
}
return true;
}
struct dirent *e;
size_t count = 0;
while (NULL != (e = readdir(d))) {
if ((0 == strcmp(e->d_name, ".")) || (0 == strcmp(e->d_name, "..")))
continue;
count++;
break;
}
if (0 != closedir(d)) {
if (err != NULL) {
*err = sb_error_new_printf(0, "failed to close directory (%s): %s\n",
dir, strerror(errno));
}
return true;
}
return count == 0;
}
int
bm_exec_native_rm(const char *output_dir, bm_filectx_t *dest, bool verbose)
{
if (verbose)
printf("Removing file '%s'\n", dest->path);
else
printf(" CLEAN %s\n", dest->short_path);
fflush(stdout);
if (0 != unlink(dest->path)) {
fprintf(stderr, "blogc-make: error: failed to remove file (%s): %s\n",
dest->path, strerror(errno));
return 3;
}
int rv = 0;
// blame freebsd's libc for all of those memory allocations around dirname
// calls!
char *short_dir = sb_strdup(dirname(dest->short_path));
char *dir = sb_strdup(dirname(dest->path));
sb_error_t *err = NULL;
while ((0 != strcmp(short_dir, ".")) && (0 != strcmp(short_dir, "/"))) {
bool empty = bm_exec_native_is_empty_dir(dir, &err);
if (err != NULL) {
fprintf(stderr, "blogc-make: error: %s\n", err->msg);
sb_error_free(err);
rv = 3;
break;
}
if (!empty) {
break;
}
if (verbose) {
printf("Removing directory '%s'\n", dir);
fflush(stdout);
}
if (0 != rmdir(dir)) {
fprintf(stderr,
"blogc-make: error: failed to remove directory(%s): %s\n",
dir, strerror(errno));
rv = 3;
break;
}
if (0 == strcmp(dir, output_dir)) {
break;
}
char *tmp = short_dir;
short_dir = sb_strdup(dirname(short_dir));
free(tmp);
tmp = dir;
dir = sb_strdup(dirname(dir));
free(tmp);
}
free(short_dir);
free(dir);
return rv;
}
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