Function agent_tool_edit

ds4_agent.c:6267–6308

Old/new editing is intentionally conservative: exact old text must be unique. * For large replacements, old may contain one [upto] marker: the head must be * unique, and the tail must be unique after that head before the whole span is * replaced. */

        agent_buf_puts(&b, "Tool error: opendir failed: ");
        agent_buf_puts(&b, strerror(errno));
        agent_buf_puts(&b, "\n");
        return agent_buf_take(&b);
    }
    agent_buf out = {0};
    char hdr[PATH_MAX + 64];
    snprintf(hdr, sizeof(hdr), "%s:\n", path);
    agent_buf_puts(&out, hdr);
    struct dirent *de;
    int shown = 0;
    while ((de = readdir(dir)) != NULL && shown < 300) {
        if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, "..")) continue;
        char full[PATH_MAX];
        snprintf(full, sizeof(full), "%s/%s", path, de->d_name);
        struct stat st;
        if (lstat(full, &st) != 0) continue;
        char type = S_ISDIR(st.st_mode) ? 'd' :
                    S_ISLNK(st.st_mode) ? 'l' :
                    S_ISREG(st.st_mode) ? '-' : '?';
        char line[PATH_MAX + 96];
        snprintf(line, sizeof(line), "%c %10lld %s%s\n", type,
                 (long long)st.st_size, de->d_name, S_ISDIR(st.st_mode) ? "/" : "");
        agent_buf_puts(&out, line);
        shown++;
    }
    if (de) agent_buf_puts(&out, "... more entries omitted ...\n");
    closedir(dir);
    return agent_buf_take(&out);
}

/* ============================================================================
 * Edit And Search Tools
 * ============================================================================
 */

static int agent_write_file_bytes(const char *path, const char *data, size_t len,
                                  char *err, size_t errlen) {
    FILE *fp = fopen(path, "wb");
    if (!fp) {
        snprintf(err, errlen, "open %s: %s", path, strerror(errno));
        return -1;
    }
    size_t wr = fwrite(data, 1, len, fp);
    if (wr != len) {
        snprintf(err, errlen, "write %s: %s", path, strerror(errno));
        fclose(fp);