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#define _GNU_SOURCE
#include <ftw.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <unistd.h>
#include <archive.h>
#include <archive_entry.h>
#include <sys/acl.h>
#include "vis-single-payload.inc"
int copy_data(struct archive *ar, struct archive *aw) {
int r;
const void *buff;
size_t size;
int64_t offset;
for (;;) {
if ((r = archive_read_data_block(ar, &buff, &size, &offset)) == ARCHIVE_EOF)
return ARCHIVE_OK;
if (r != ARCHIVE_OK) {
fprintf(stderr, "archive_read_data_block() failed: %s\n", archive_error_string(ar));
return r;
}
if ((r = archive_write_data_block(aw, buff, size, offset)) != ARCHIVE_OK) {
fprintf(stderr, "archive_write_data_block() failed: %s\n", archive_error_string(aw));
return r;
}
}
return ARCHIVE_OK;
}
int extract(const char *path) {
struct archive *a;
struct archive_entry *entry;
struct archive *ext;
char * abs_path = NULL;
const char * term;
char * termenv;
int r = ARCHIVE_FAILED;
if ((a = archive_read_new()) == NULL)
return ARCHIVE_FAILED;
if ((r = archive_read_support_filter_xz(a)) != ARCHIVE_OK)
goto out10;
if ((r = archive_read_support_format_tar(a)) != ARCHIVE_OK)
goto out10;
if ((ext = archive_write_disk_new()) == NULL) {
r = ARCHIVE_FAILED;
goto out10;
}
if ((r = archive_read_open_memory(a, vis_single_payload, sizeof(vis_single_payload))) != ARCHIVE_OK) {
fprintf(stderr, "archive_read_open_memory() failed: %s\n", archive_error_string(a));
goto out20;
}
while (archive_read_next_header(a, &entry) == ARCHIVE_OK) {
if (asprintf(&abs_path, "%s/%s", path, archive_entry_pathname(entry)) == -1)
goto out20;
archive_entry_set_pathname(entry, abs_path);
free(abs_path);
if ((r = archive_write_header(ext, entry)) != ARCHIVE_OK) {
fprintf(stderr, "archive_write_header() failed: %s\n", archive_error_string(ext));
goto out20;
}
if ((r = copy_data(a, ext)) != ARCHIVE_OK)
goto out20;
if ((r = archive_write_finish_entry(ext)) != ARCHIVE_OK) {
fprintf(stderr, "archive_write_finish_entry() failed: %s\n", archive_error_string(ext));
goto out20;
}
}
out20:
archive_write_close(ext);
archive_write_free(ext);
out10:
archive_read_close(a);
archive_read_free(a);
return ARCHIVE_OK;
}
int unlink_cb(const char *fpath, const struct stat *sb, int typeflag, struct FTW *ftwbuf) {
return remove(fpath);
}
int main(int argc, char **argv) {
char tmp_dirname_template[] = "/tmp/.vis-single-XXXXXX";
const char *tmp_dirname;
char *abs_path = NULL;
const char *term;
char *termenv = NULL;
int child_pid, statval, rc = EXIT_FAILURE;
if ((tmp_dirname = mkdtemp(tmp_dirname_template)) == NULL) {
perror ("mkdtemp: Could not create tmp directory");
goto out10;
}
if (extract(tmp_dirname) != ARCHIVE_OK)
goto out20;
if (asprintf(&abs_path, "%s/vis", tmp_dirname) == -1)
goto out20;
child_pid = fork();
if (child_pid == -1) {
fprintf(stderr, "could not fork!\n");
goto out30;
} else if (child_pid == 0) {
if ((term = getenv("TERM")) == NULL) {
puts("TERM is not defined!");
goto out30;
}
if (asprintf(&termenv, "TERM=%s", term) == -1)
goto out30;
char *env[] = { termenv, NULL };
execve(abs_path, argv, env);
}
waitpid(child_pid, &statval, WUNTRACED|WCONTINUED);
rc = WEXITSTATUS(statval);
out30:
free(abs_path);
free(termenv);
out20:
nftw(tmp_dirname, unlink_cb, 64, FTW_DEPTH|FTW_PHYS);
out10:
return rc;
}
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